Lenovo ThinkSystem SR850 V4 Server

The Lenovo ThinkSystem SR850 V4 is a 4-socket large-memory server that is densely packed into a 2U rack design. The server offers technology advances, including Intel Xeon 6700-Series P-core processors, up to 16 TB of 6400 MHz DDR5 memory, and up to 12x PCIe Gen 5 slots for adapters. 

The SR850 V4 is designed to handle a wide range of data services workloads with large memory footprint demands, such as databases including in-memory databases, data lakes, big data analytics, business intelligence, and OLTP.

Figure 1. Lenovo ThinkSystem SR850 V4 with optional security bezel

The Lenovo ThinkSystem SR850 V4 provides the advanced capabilities of four of the new Intel Xeon 6 processors with Performance cores (P-cores), however if you wish, you can start with two processors and 32 DIMM slots and then easily expand up to four processors and 64 DIMMs.

The SR850 V4 has space for 24x 2.5-inch drive bays at the front of the server, and all bays can be configured as NVMe drive bays to maximize storage performance. The server also supports the new E3.S drive type, with up to 32x E3.S 1T drive bays at the front of the server.

The flexible ThinkSystem SR850 V4 server supports Intel Xeon 6 P-core processors and can scale from two to four processors. Built for standard workloads like general business applications and server consolidation, it can also accommodate high-growth areas such as databases and virtualization. The SR850 V4’s agile design permits rapid upgrades for processors and memory, and its large, flexible storage capacity helps to keep pace with data growth.

With the capability to support up to 64 DIMMs, four sockets, up to 32 drives for internal storage, up to 12 PCIe slots, plus two dedicated OCP 3.0 slots for up to 400 GbE networking, the SR850 V4 provides unmatched features and capabilities in a dense 2U rack-mount design.

Scalability and performance

The ThinkSystem SR850 V4 offers numerous features to boost performance, improve scalability and reduce costs:

• Supports two or four Intel Xeon 6700-series processors with Performance-cores (P-cores)
  • Up to 86 cores and 172 threads
  • Core speeds of up to 4 GHz
  • TDP ratings of up to 350 W
• Support for DDR5 memory DIMMs to maximize the performance of the memory subsystem:
  • Up to 64 DDR5 memory DIMMs, 16 DIMMs per processor
  • 8 memory channels per processor (2 DIMMs per channel)
  • Supports 1 DIMM per channel operating at 6400 MHz
  • Supports 2 DIMMs per channel operating at 5200 MHz
  • Using 256GB 3D RDIMMs, the server supports up to 16TB of system memory
• Support for Compute Express Link (CXL) memory DIMMs in an E3.S 2T form factor, up to 16x CXL DIMMs with two processors. With CXL 2.0 for next-generation workloads, you can reduce compute latency in the data center and lower TCO. CXL is a protocol that runs across the standard PCIe physical layer and can support both standard PCIe devices as well as CXL devices on the same link.
• Up to 24x 2.5-inch drive bays -- supporting combinations of SAS or SATA HDDs, SAS or SATA SSDs, and NVMe PCIe SSDs -- provide a flexible and scalable all-in-one platform to meet your increasing demands. Up to 24x NVMe drives are supported, maximizing drive I/O performance in terms of throughput, bandwidth, and latency.
• As an alternative to 2.5-inch drive bays, the server supports up to 32x E3.S 1T NVMe drives, a new form factor drive for high-density and high-performance NVMe storage.
• The server has up to two dedicated industry-standard OCP 3.0 slots supporting a variety of Ethernet network adapters. A simple-swap mechanism with a thumbscrew and pull-tab enables tool-less installation and removal of the adapter. The adapter supports shared BMC network sideband connectivity to enable out-of-band systems management.
• Up to 12 PCIe slots in addition to the two OCP 3.0 Ethernet slots to maximize I/O capabilities.
• Supports up to 4x single-width GPUs or 2x double-wide GPUs, for accelerated processing power in a 2U system. For support for more GPUs in a 4-socket server, consider the ThinkSystem SR860 V4 server.
• Supports high-speed RAID controllers providing 12 Gb SAS connectivity to the drive backplanes. A variety of PCIe 3.0 and PCIe 4.0 RAID adapters are available.
• Supports M.2 drives for convenient operating system boot functions or data storage. M.2 drives can be internally mounted or can be mounted at the rear of the server as hot-swap drives. Optional RAID-0 or RAID-1.
• Supports Intel VROC (Virtual RAID on CPU) which enables basic RAID functionality on the onboard NVMe ports of the server, with no additional adapter needed.
• The server offers PCI Express 5.0 I/O expansion capabilities that doubles the theoretical maximum bandwidth of PCIe 4.0 (32GT/s in each direction for PCIe Gen 5, compared to 16 GT/s with PCIe Gen 4 and 8 GT/s with PCIe Gen 3). A PCIe 5.0 x16 slot provides 128 GB/s bandwidth, enough to support a dual-port 200GbE network connection or a single-port 400GbE connection.

Availability and serviceability

The SR850 V4 provides many features to simplify serviceability and increase system uptime:

• Designed to run 24 hours a day, 7 days a week
• The server offers Single Device Data Correction (SDDC, also known as Chipkill), Adaptive Double-Device Data Correction (ADDDC, also known as Redundant Bit Steering or RBS), and memory mirroring for redundancy in the event of a non-correctable memory failure.
• The server offers hot-swap drives, supporting RAID redundancy for data protection and greater system uptime.
• Available M.2 boot adapters support RAID-1 (using onboard hardware RAID or using Intel VROC) which can enable two M.2 drives to be configured as a redundant pair.
• The server has up to two hot-swap redundant power supplies and up to six hot-swap redundant fans to provide availability for business-critical applications.
• The light path diagnostics feature uses LEDs to lead the technician to failed (or failing) components, which simplifies servicing, speeds up problem resolution, and helps improve system availability.
• Solid-state drives (SSDs) offer more reliability and performance than traditional mechanical HDDs for greater uptime.
• Proactive Platform Alerts (including PFA and SMART alerts): Processors, voltage regulators, memory, internal storage (SAS/SATA HDDs and SSDs, NVMe SSDs, M.2 storage), fans, power supplies, RAID controllers, server ambient and subcomponent temperatures. Alerts can be surfaced through the XClarity Controller to managers such as Lenovo XClarity Administrator, VMware vCenter, and Microsoft System Center. These proactive alerts let you take appropriate actions in advance of possible failure, thereby increasing server uptime and application availability.
• The built-in XClarity Controller continuously monitors system parameters, triggers alerts, and performs recovery actions in case of failures to minimize downtime.
• Built-in diagnostics in UEFI, using Lenovo XClarity Provisioning Manager, speed up troubleshooting tasks to reduce service time.
• Lenovo XClarity Provisioning Manager supports diagnostics and can save service data to a USB key drive or remote CIFS share folder for troubleshooting and reduce service time.
• Auto restart in the event of a momentary loss of AC power (based on power policy setting in the XClarity Controller service processor)
• Offers a diagnostics port on the front of the server to allow you to attach an external diagnostics handset for enhanced systems management capabilities.
• Support for the XClarity Administrator Mobile app running on a supported smartphone or tablet and connected to the server through the service-enabled USB port, enables additional local systems management functions.
• Three-year or one-year customer-replaceable unit and onsite limited warranty (varies by geography), 9 x 5 next business day. Optional service upgrades are available.

Manageability and security

Systems management features simplify local and remote management of the SR850 V4:

• The server includes XClarity Controller 3 (XCC3) to monitor server availability. Optional upgrade to XCC3 Premier to provide remote control (keyboard video mouse) functions, support for the mounting of remote media files (ISO and IMG image files), boot capture and power capping. XCC3 Premier also offers additional features such as Neighbor Groups, System Guard, a CNSA-compliant security mode, a FIPS 140-3-compliant mode, and enhanced NIST 800-193 support.
• Dedicated Ethernet port at the rear of the server for remote management (BMC management).
• Lenovo XClarity Administrator offers comprehensive hardware management tools that help to increase uptime, reduce costs and improve productivity through advanced server management capabilities.
• UEFI-based Lenovo XClarity Provisioning Manager, accessible from F1 during boot, provides system inventory information, graphical UEFI Setup, platform update function, RAID Setup wizard, operating system installation function, and diagnostic functions.
• Support for Lenovo XClarity Energy Manager which captures real-time power and temperature data from the server and provides automated controls to lower energy costs.
• An integrated industry-standard Unified Extensible Firmware Interface (UEFI) enables improved setup, configuration, and updates, and simplifies error handling.
• Support for industry standard management protocols, IPMI 2.0, SNMP 3.0, Redfish REST API, serial console via IPMI
• Enhanced security for storage connectivity with Fibre Channel adapters such as the Emulex SecureHBA, which provides autonomous in-flight encryption with integrated post-quantum cryptography (PQC) algorithms and CNSA 1.0 and 2.0 compliance.
• An integrated hardware Trusted Platform Module (TPM) supporting TPM 2.0 enables advanced cryptographic functionality, such as digital signatures and remote attestation.
• Administrator and power-on passwords help protect from unauthorized access to the server.
• Supports Secure Boot to ensure only a digitally signed operating system can be used. Supported with HDDs and SSDs, as well as M.2 drives.
• Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
• Intel Execute Disable Bit functionality can prevent certain classes of malicious buffer overflow attacks when combined with a supported operating system.
• Intel Trusted Execution Technology provides enhanced security through hardware-based resistance to malicious software attacks, allowing an application to run in its own isolated space, protected from all other software running on a system.
• Additional physical security features are an available chassis intrusion switch and available lockable front bezel.

Energy efficiency

The SR850 V4 offers the following energy-efficiency features to save energy, reduce operational costs, and increase energy availability:

• The server supports advanced Lenovo Neptune Core direct-water cooling (DWC) capabilities, where heat from the processors is removed from the rack and the data center using an open loop and coolant distribution units, resulting in lower energy costs.
• Energy-efficient system board components help lower operational costs.
• High-efficiency power supplies with 80 PLUS Titanium certifications
• Solid-state drives (SSDs) consume as much as 80% less power than traditional spinning 2.5-inch HDDs.
• Support for Lenovo XClarity Energy Manager provides advanced data center power notification, analysis, and policy-based management to help achieve lower heat output and reduced cooling needs.
• The server uses hexagonal ventilation holes, which can be grouped more densely than round holes, providing more efficient airflow through the system and thus keeping your system cooler.

The ThinkSystem SR850 V4 improves on the previous generation SR850 V3, as summarized in the following table.

For details on the front ports, including the optional front USB and Mini DP video port, see the Local management section.

This section shows the architectural block diagrams of the SR850 V4, showing the major components and their connections. The connections of the slots depends on the PCIe riser and drive drives configurations.

The following table lists the standard specifications.

ThinkSystem SR850 V4 models can be configured by using the Lenovo Data Center Solution Configurator (DCSC).

Topics in this section:

• CTO models
• Base feature codes

CTO models

ThinkSystem SR850 V4 models can be configured by using the Lenovo Data Center Solution Configurator (DCSC).

Preconfigured server models may also be available for the SR850 V4, however these are region-specific; that is, each region may define their own server models, and not all server models are available in every region.

The following table lists the base CTO models of the ThinkSystem SR850 V4 server.

Base feature codes

Models of the SR850 V4 are defined based on the configuration of front drives. The feature codes for these chassis bases are as listed in the following table.

The SR850 V4 supports 2 or 4 of the following Intel processors:

• Intel Xeon 6700-series with P-cores (formerly "Granite Rapids SP" or GNR SP)

Quantities of 1 or 3 processors are not supported.

Topics in this section:

• Processor options
• Processor features
• Intel On Demand feature licensing
• Two-processor configurations
• Processor cooling
• Lenovo Processor Neptune Core Module - Open-loop liquid cooling
• UEFI operating modes

• Intel Dynamic Load Balancer (Intel DLB)

  Improve the system performance related to handling network data on multi-core Intel Xeon Scalable processors. Intel Dynamic Load Balancer (Intel DLB) enables the efficient distribution of network processing across multiple CPU cores/threads and dynamically distributes network data across multiple CPU cores for processing as the system load varies. Intel DLB also restores the order of networking data packets processed simultaneously on CPU cores.

• Intel Data Streaming Accelerator (Intel DSA)

  Drive high performance for storage, networking, and data-intensive workloads by improving streaming data movement and transformation operations. Intel Data Streaming Accelerator (Intel DSA) is designed to offload the most common data movement tasks that cause overhead in data center-scale deployments. Intel DSA helps speed up data movement across the CPU, memory, and caches, as well as all attached memory, storage, and network devices.

• Intel In-Memory Analytics Accelerator (Intel IAA)

  Run database and analytics workloads faster, with potentially greater power efficiency. Intel In-Memory Analytics Accelerator (Intel IAA) increases query throughput and decreases the memory footprint for in-memory database and big data analytics workloads. Intel IAA is ideal for in-memory databases, open source databases and data stores like RocksDB, Redis, Cassandra, and MySQL.

The processors also support a separate and encrypted memory space, known as the SGX Enclave, for use by Intel Software Guard Extensions (SGX). The size of the SGX Enclave supported varies by processor model. Intel SGX offers hardware-based memory encryption that isolates specific application code and data in memory. It allows user-level code to allocate private regions of memory (enclaves) which are designed to be protected from processes running at higher privilege levels.

The following table summarizes the key features of the Intel Xeon 6 P-core processors that are supported in the SR850 V4.

Intel On Demand feature licensing

Intel Xeon 6 processors do not support Intel On Demand feature licensing for Accelerators.

Ordering information is listed in the following table.

With the Processor Neptune Core Module, all heat generated by the processors is removed from the server using water. This means that the server fans and data center air conditioning units only need to remove the heat generated by the other components. This results in lower air conditioning costs and it enables the use of slower fans which results in lower overall power consumption.

The following figure shows the Lenovo Processor Neptune Core Module.

Figure 10. Lenovo Processor Neptune Core Module

The Processor Neptune Core Module also includes a leak detection module which can detect a leakage of more than 0.5ml (about 10 drops) along the length of the tube and then issue an event to the XClarity Controller. XCC will then post an error to the System Event Log and enable further actions. Once the liquid evaporates, a further event is issue to XCC.

The Processor Neptune Core Module is only available in CTO orders, not as a field upgrade. Ordering information is listed in the following table.

The SR850 V4 uses Lenovo TruDDR5 memory operating at up to 6400 MHz. The server supports up to 64 DIMMs with 4 processors. The processors have 8 memory channels and support 2 DIMMs per channel (DPC). The server supports up to 16TB of memory using 64x 256GB RDIMMs and two processors. The server also supports up to 16x CXL memory DIMMs (4 processors are required) which are installed in E3.S 2T drive bays.

DIMMs operate at the following speeds, up to the memory bus speed of the processor selected. See the Processor features section for specifics.

• RDIMMs and 3DS RDIMMs:
  • 1 DIMM per channel: Up to 6400 MHz
  • 2 DIMMs per channel using RDIMMs: Up to 5200 MHz
• CXL 2.0 memory modules - install in E3.S 2T front drive bays
  • 16 CXL modules (4 processors; 4 memory modules per processor)

Lenovo TruDDR5 memory uses the highest quality components that are sourced from Tier 1 DRAM suppliers and only memory that meets the strict requirements of Lenovo is selected. It is compatibility tested and tuned to maximize performance and reliability. From a service and support standpoint, Lenovo TruDDR5 memory automatically assumes the system warranty, and Lenovo provides service and support worldwide.

• RDIMM memory
• CXL memory
• Memory rules

RDIMM memory

The following table lists the RDIMMs and 3DS RDIMMs that are currently supported by the SR850 V4. These DIMMs are installed in the DIMM slots adjacent to the processors. The table also lists the supported quantities.

For more information on this memory, see the Lenovo Press paper, Introduction to DDR5 Memory.

CXL memory

The following table lists the CXL memory that are currently supported by the SR850 V4. These memory options are installed in the front E3.S 2T drive bays at the front of the server.

For servers that have a combination of DDR5 memory and CXL memory, you can specify how you want to the memory spaces to be presented to the operating system. For CTO orders, you can specify the factory to set the memory mode, as described in the table below. The memory mode can also be changed in UEFI at a later stage.

For more information, see the Lenovo Press paper, Introduction to CXL 2.0 Memory.

Memory rules

The following rules apply when specifying the memory configuration:

• The tables above list the supported quantities. Other quantities are not supported.
• All installed DIMMs, except for CXL memory, must be identical part numbers; mixing not supported
• The use of CXL memory requires 4 processors (the use of 2 processors may be supported via Special Bid)
• CXL memory can be mixed with the following RDIMMs
  • ThinkSystem 64GB TruDDR5 6400MHz (2Rx4) RDIMM, 4X77A90966
  • ThinkSystem 96GB TruDDR5 6400MHz (2Rx4) RDIMM, 4X77A90997
  • ThinkSystem 128GB TruDDR5 6400MHz (2Rx4) RDIMM, 4X77A90993
• CXL memory is installed in E3.S 2T drive bays, however hot-swap functionality is not supported
• CXL heterogenous mode (feature C8VB) is not supported with processors with an LCC die. See the Processor features section to see which processors have an LCC die.

For best performance, consider the following:

See the Lenovo Press article "RAS Features of the Lenovo ThinkSystem Intel Servers" for more information about memory RAS features: https://lenovopress.lenovo.com/lp1711-ras-features-of-the-lenovo-thinksystem-intel-servers

If memory channel mirroring is used, then DIMMs must be installed in pairs (minimum of one pair per processor), and both DIMMs in the pair must be identical in type and size. 50% of the installed capacity is available to the operating system.

Memory rank sparing is implemented using ADDDC/ADC-SR/ADDDC-MR to provide DRAM-level sparing feature support.

The SR850 V4 supports up to 24x 2.5-inch drive bays or up to 32x E3.S 1T drive bays. All drive bays are hot-swap and all front-accessible. 

The server also supports one or two M.2 drives, in the following possible locations, configuration dependent:

• Installed in an M.2 adapter internal to the server (non-hot-swap)
• Hot-swap in the rear of the server (configurations with full-height slots only)

In this section:

• NVMe drive support
• Front drive bays
• Tri-Mode support - RAID 940 adapters
• Storage configurations
• Field upgrades
• M.2 drives
• SED encryption key management with SKLM

NVMe drive support

The SR850 V4 supports up to 24x 2.5-inch NVMe drives or up to 32x E3.S 1T NVMe drives to maximize storage performance, each with a direct connection to the processors. All connections are made using onboard connectors; no NVMe retimer adapters are needed or supported. There is no oversubscription: each x4 drive has a full x4 (four PCIe Gen5 lanes) connection to the processor.

These drive bays are shown in the figure below.

Figure 11. SR850 V4 drive bays

The following table lists the supported backplanes.

The SR850 V4 offers a variety of controller options for internal drives:

• For 2.5-inch drives:
  • RAID adapters and HBAs for SAS/SATA drives (PCIe slot-based)
  • RAID adapters and HBAs for SAS/SATA drives (cabled in a dedicated space)
  • Onboard NVMe ports with RAID support using Intel VROC NVMe RAID
  • Tri-Mode support using RAID 940 adapters for NVMe drives, with RAID provided by the RAID adapter
• For E3.S EDSFF drives:
  • Onboard NVMe ports with RAID support using Intel VROC NVMe RAID
• For M.2 drives (see M.2 drives section)
  • SATA controller integrated on the M.2 adapters
  • NVMe controller integrated on the M.2 adapters

As well as supporting RAID adapters and HBAs that install in a PCIe slot, the SR850 V4 with 2.5-inch front drive bays supports a custom form factor (CFF) adapter that is mounted in the server and cabled to one of the onboard NVMe ports.

The following table lists the adapters used for the internal storage of the server. For VROC ordering information, see the Intel VROC section.

Configuration notes:

• Supercap support: The table lists whether the adapter includes a power module (supercap) to power the flash memory. The server supports 2 supercaps, mounted on the air baffle. The number of supercaps supported also determines the maximum number of RAID adapters with flash that can be installed in the server, both with internal ports and with external ports. 

The onboard NVMe support has the following features:

• Support integrated into the Intel processor
• Each drive has PCIe 5.0 x4 host interface
• Supports JBOD
• Supports RAID using Intel VROC

For specifications about the RAID adapters and HBAs supported by the SR850 V4, see the ThinkSystem RAID Adapter and HBA Comparison, available from:
https://lenovopress.com/lp1288-lenovo-thinksystem-raid-adapter-and-hba-reference#sr850-v4-support=SR850%2520V4

For details about these adapters, see the relevant product guide:

• SAS HBAs: https://lenovopress.com/servers/options/hba
• RAID adapters: https://lenovopress.com/servers/options/raid

On the SR850 V4, Intel VROC provides RAID functions for the onboard NVMe controller (Intel VROC NVMe RAID).

VROC NVMe RAID offers RAID support for any NVMe drives directly connected to the ports on the server's system board or via adapters such as NVMe retimers or NVMe switch adapters. On the SR850 V4, RAID levels implemented are based on the VROC feature selected as indicated in the following table. RAID 1 is limited to 2 drives per array, and RAID 10 is limited to 4 drives per array. Hot-spare functionality is also supported.

The SR850 V4 supports the VROC NVMe RAID offerings listed in the following table.

Configuration notes:

• If a feature code is ordered in a CTO build, the VROC functionality is enabled in the factory. For field upgrades, order a part number and it will be fulfilled as a Feature on Demand (FoD) license which can then be activated via the XCC management processor user interface.
• Intel VROC NVMe is supported on all Intel Xeon Scalable processors

The following tables list the drive options for internal storage of the server.

The server does not supports any internal backup units, such as tape drives or RDX drives. External backup units are available as described in the External backup units section.

The server supports the external USB optical drive listed in the following table.

The drive is based on the Lenovo Slim DVD Burner DB65 drive and supports the following formats: DVD-RAM, DVD-RW, DVD+RW, DVD+R, DVD-R, DVD-ROM, DVD-R DL, CD-RW, CD-R, CD-ROM.

The SR850 V4 supports up to 14 PCIe slots: up to 12x regular PCIe slots – either Gen4 or Gen5 – plus two OCP 3.0 slots with Gen5 interfaces. The slot configurations are shown in the figure below - the server supports either 4 risers all with low-profile slots, or 3 risers with a mix of low-profile and full-height.

Figure 15. Slots in the SR850 V4

Topics in this section:

• Riser & slot support
• Riser ordering information
• Serial port
• OCP slot filler

Riser & slot support

The SR850 V4 server supports Low Profile-only slot configurations, or a mix of Low Profile and Full Height slots, to suit the needs of installed applications.

• Maximum slots config: 12x Low Profile + 2x OCP slots (4 risers)
• Full height slot configs: 6x Full Height slots + 3x Low Profile slots + 2x OCP slots (3 risers)
• Lower-cost x8 config: 4x Full Height x8 slots + 3x Low Profile slots + 2x OCP slots (3 risers)

Maximum slots config: 12x Low Profile + 2x OCP slots (4 risers)

For applications that require as many slots as possible, the SR850 V4 supports a configuration with 12x Low Profile slots plus 2x OCP slots.

The following figure shows the two 12x Low Profile configurations. Blue slots are Gen4 and green slots are Gen5.

The processor that each slot is connected to is also shown in the figure as P1, P2, P3 or P4:

• P1 means the slot is connected to processor 1, etc
• Slots 4, 5 and 12 indicate "P1/4" or "P2/3" which means the following:
  • The first number indicates which processor connected in 2.5-inch drive configurations
  • The second number indicates which processor connected in E3.S drive configurations

Figure 16. SR850 V4 with 12x Low Profile slots + 2x OCP slots

Full height slot configs: 6x Full Height slots + 3x Low Profile slots + 2x OCP slots (3 risers)

For applications that require full-height half-length (FHHL) slots or full-height full-length (FHFL) slots (including double-wide GPUs), the SR850 V4 supports a configuration with 6x Full Height slots + 3x Low Profile slots plus 2x OCP slots.

Two configurations are supported, as shown in the following figure.

The following figure shows the two configurations. Green slots are Gen5 and blue slots are Gen4. The red shading indicates where the double-wide GPUs can be installed. The processor that each slot is connected to is also shown in the figure as P1, P2, P3 or P4.

Figure 17. SR850 V4 with 6x Full Height slots + 3x Low Profile slots

Lower-cost x8 config: 4x Full Height x8 slots + 3x Low Profile slots + 2x OCP slots (3 risers)

As an alternative lower-cost configuration, the server also supports 7x Gen5 slots, however 6 of them are x8 slots. 

Figure 18. SR850 V4 with 6x Full Height x8 slots + 3x Low Profile slots

Riser ordering information

The riser cards supported are listed in the following table. The table also lists the total slots and what type of slots each riser card includes. All of the x8 slots have a physical x16 connector.

Ordering information is shown in the following table.

The bracket is shown in the following figure. The option part number includes both Low Profile and Full Height brackets.

Figure 19. ThinkSystem V4 1U/2U COM Port Upgrade Kit

This section lists the supported network adapters:

• OCP network adapters
• PCIe network adapters
• Adapters with Generic firmware

OCP network adapters

The server has two dedicated OCP 3.0 SFF slots each with either a PCIe x8 or x16 host interface. The OCP slots are both located at the rear of the server. See Figure 3 for the location of the OCP slots.

The following table lists the supported OCP adapters. One port can optionally be shared with the XCC management processor for Wake-on-LAN and NC-SI support.

PCIe network adapters

The following table lists additional supported network adapters that can be installed in the regular PCIe slots.

The table indicates quantities and slot locations based on the riser configuration of the server (specified by the Base feature code):

• 4-riser config (12 slots, all Low Profile): base C947 or C94E
• 3-riser config (9 slots, mix of LP and FH): base C946 or C94D

For more information, including the transceivers and cables that each adapter supports, see the list of Lenovo Press Product Guides in the Networking adapters category:
https://lenovopress.com/servers/options/ethernet

Adapters with Generic firmware

As indicated in the tables of supported adapters, some adapters are now offered by Lenovo with standard vendor firmware (look for "Generic FW" or "Generic" in the adapter names). These adapters are supported in Lenovo servers however there are currently limitations on the use of Lenovo management tools.

Support in Lenovo XClarity management tools for adapters with generic firmware is per the following table.

This section describes the supported GPUs.

• GPU part numbers
• GPU configuration rules
• GPU Full Length Thermal Option Kit
• GPU cable kit

GPU part numbers

The SR850 V4 supports the following graphics processing units (GPUs).

The table indicates quantities and slot locations based on the riser configuration of the server (specified by the Base feature code):

• 4-riser config (12 slots, all Low Profile): base C947 or C94E
• 3-riser config (9 slots, mix of LP and FH): base C946 or C94D

For information about these GPUs, see the ThinkSystem GPU Summary, available at:
https://lenovopress.com/lp0768-thinksystem-thinkagile-gpu-summary

GPU configuration rules

The following configuration requirements must be met when installing GPUs:

• The table includes a Controlled GPU column. If a GPU is listed as Controlled, that means the GPU is not offered in certain markets, as determined by the US Government. If a GPU is listed as No, that means the GPU is not controlled and is available in all markets.
• GPUs are only supported in a 3-riser configuration (base feature codes C946 or C94D)
• The use of a DW GPU requires Riser ThinkSystem SR850 V4 FHHL E/x16/x16 Gen5 PCIe Riser (feature C95G)
• All GPUs installed must be identical

GPU Full Length Thermal Option Kit

When installing any full-length GPU as a field upgrade, you will also need to order the GPU Enablement Kit as listed in the following table. This kit is only required for full-length GPUs and is not required for low profile GPUs such as the NVIDIA L4. See the GPU part number table above for GPU form factors.

GPU cable kit

The following cable kit is offered to provide auxiliary power cables for GPUs that require one. See the GPU part numbers section to see which GPUs require an auxiliary power cable.

Configuration notes:

• This cable kit is only required for field upgrades; factory (CTO) orders will automatically include any required cables.
• This cable kit is only required for GPUs that require an auxilary power cable. See the GPU part number table.
• The cable kit is only required if you are adding additional GPUs to a server that already has one GPU installed from a CTO order. If you are doing a field upgrade to install the first DW GPU to a server, order the ThinkSystem SR850 V4 Full Length GPU Thermal Option Kit (4XH7B08885) instead, since 4XH7B08885 includes the necessary power cable.

The following table lists the Fibre Channel HBAs supported by the SR850 V4.

The table indicates quantities and slot locations based on the riser configuration of the server (specified by the Base feature code):

• 4-riser config (12 slots, all Low Profile): base C947 or C94E
• 3-riser config (9 slots, mix of LP and FH): base C946 or C94D

For more information, see the list of Lenovo Press Product Guides in the Host bus adapters category:
https://lenovopress.com/servers/options/hba

The following table lists SAS HBAs supported by SR850 V4 server for use with external storage.

The table indicates quantities and slot locations based on the riser configuration of the server (specified by the Base feature code):

• 4-riser config (12 slots, all Low Profile): base C947 or C94E
• 3-riser config (9 slots, mix of LP and FH): base C946 or C94D

For a comparison of the functions of the supported storage adapters, see the ThinkSystem RAID Adapter and HBA Reference:
https://lenovopress.lenovo.com/lp1288#sr850-v4-support=SR850%2520V4&internal-or-external-ports=External

For more information, see the list of Lenovo Press Product Guides in the Host bus adapters and RAID adapters categories:
https://lenovopress.com/servers/options/hba
https://lenovopress.com/servers/options/raid

The SR850 V4 optionally supports open-loop water cooling to remove heat from the processors. For details of available cooling methods, see the Processor cooling section.

The SR850 V4 server has six 60 mm hot-swap variable-speed fans, and all fans are standard in all models. The server offers N+1 rotor redundancy. The server also has an additional fan integrated in each of the two power supplies.

System fan selection is automatically derived by the configurator tool based on the configuration selected. Fan choices are as follows:

• Standard fans, single-rotor 24K RPM
• Performance fans, dual-rotor, 20K RPM
• Ultra performance fans, dual-rotor, 21K RPM

Ordering information for the fans is listed in the following table. Option part numbers are offered in case customers wish to have spare parts readily available to minimize disruption in the event a fan develops a fault.

The SR850 V4 supports two redundant hot-swap power supplies.

Topics in this section:

• Power supply ordering information
• Power supply LEDs
• Zero-output mode
• Power cords
• Power cords (C19 connectors)
• -48V DC power cord
• HVAC/HVDC power cord

Power supply ordering information

The power supply choices are listed in the following table. If two power supplies are installed, both power supplies used in server must be identical.

Supported voltage ranges are as follows:

• AC power supplies listed as 230V support high-range (200-240V 50/60 Hz) power. 
• For China customers, all AC power supplies also support 240V DC.
• The -48V DC power supply supports voltage range -44V to -54V DC.
• The HVAC/HVDC power supply supports voltage ranges 200-277V AC single phase, and 240-380V DC

For inlet current requirements, see the Physical and electrical specifications section.

Power supply options do not include a line cord. See the tables below for details about supported line cords, including the power cords for the DC power supplies. For server configurations, the inclusion of a power cord is model dependent. Configure-to-order models can be configured without power cords if desired.

The SR850 V4 supports both CRPS and CRPS Premium power supplies. CRPS Premium power supplies offer the following additional features:

• Over-subscription
• More accurate power metering
• Virtual reseat
• Enhanced fault detection
• System cooling assist (fan override)
• Fault LEDs
• VPD support
• Zero-output mode support (cold redundancy mode) (see the Zero-output mode section)

When Zero-output mode is configured in XCC and the server power load is sufficiently low, one of the installed power supplies enters into the Standby state while the other one delivers entire load. When the power load increases, the standby power supply will switch to Active state to provide sufficient power to the server.

Zero-output mode can be enabled or disabled in the XClarity Controller web interface, Server Configuration > Power Policy. If you select Disable, then both power supplies will be in the Active state.

-48V DC power cord

For the -48V DC Power Supply, the following power cable is supported.

The following figure shows the power cable.

Figure 20. -48V DC power cord

HVAC/HVDC power cord

For the HVDC Power Supply, the following power cable is supported.

The following figure shows the power cable.

Figure 21. HVDC power cord

The SR850 V4 contains an integrated service processor, XClarity Controller 3 (XCC3), which provides advanced control, monitoring, and alerting functions. The XCC3 is based on an OpenBMC design, using the AST2600 baseboard management controller (BMC) with a dual-core ARM Cortex A7 32-bit RISC service processor running at 1.2 GHz.

Topics in this section:

• System I/O Board (DC-SCM)
• Local management
• System status with XClarity Mobile
• Remote management
• MicroSD for XCC local storage
• XCC3 Premier
• Lenovo XClarity Provisioning Manager
• Lenovo XClarity One
• Lenovo XClarity Administrator
• Lenovo XClarity Integrators
• Lenovo XClarity Essentials
• Lenovo XClarity Energy Manager
• Lenovo Capacity Planner

Note: The NMI (non-maskable interrupt) button is no longer present on the board. Lenovo recommends using the NMI function that is part of the XCC user interfaces instead.

Figure 22. System I/O Board

The board also has the following components:

• XClarity Controller 3, implemented using the ASPEED AST2600 baseboard management controller (BMC).
• Root of Trust (RoT) module - implements Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) which enables the server to be NIST SP800-193 compliant. For more details about PFR, see the Security section.
• MicroSD card port to enable the use of a MicroSD card for additional storage for use with the XCC3 controller. XCC3 can use the storage as a Remote Disc on Card (RDOC) device (up to 4GB of storage). It can also be used to store firmware updates (including N-1 firmware history) for ease of deployment.

  Tip: Without a MicroSD card installed, the XCC controller will have 100MB of available RDOC storage.

Ordering information for the supported Micro SD cards are listed in the MicroSD for XCC local storage section.

The steps to connect the mobile device are as follows:

1. Enable USB Management on the server, by holding down the ID button for 3 seconds (or pressing the dedicated USB management button if one is present)
2. Connect the mobile device via a USB cable to the server's USB port with the management symbol
3. In iOS or Android settings, enable Personal Hotspot or USB Tethering
4. Launch the Lenovo XClarity Mobile app

Configuration notes:

• The use of XClarity Mobile requires front USB ports. If your server doesn't already include front USB ports, order the field upgrade 4XF7B08886 (2.5-inch drives) or 4XF7B08887 (E3.S drives) as described in the Local management section

Remote management

The server offers a dedicated RJ45 Ethernet port at the rear of the server for remote management via the XClarity Controller management processor. The port supports 10/100/1000 Mbps speeds.

Remote server management is provided through industry-standard interfaces:

• Intelligent Platform Management Interface (IPMI) Version 2.0
• Simple Network Management Protocol (SNMP) Version 3 (no SET commands; no SNMP v1)
• Common Information Model (CIM-XML)
• Representational State Transfer (REST) support
• Redfish support (DMTF compliant)
• Web browser - HTML 5-based browser interface (Java and ActiveX not required) using a responsive design (content optimized for device being used - laptop, tablet, phone) with NLS support

MicroSD for XCC local storage

The server includes a MicroSD card port to enable the use of a MicroSD card for additional storage for use with the XCC controller. XCC can use the storage as a Remote Disc on Card (RDOC) device (up to 4GB of storage). It can also be used to store firmware updates (including N-1 firmware history) for ease of deployment.

Tip: Without a MicroSD card installed, the XCC controller will have 100MB of available RDOC storage.

Ordering information for the supported Micro SD cards is listed in the following table.

XCC3 Premier includes the following functions:

• System Guard - Monitor hardware inventory for unexpected component changes, and simply log the event or prevent booting
• Neighbor Group - Enables administrators to manage and synchronize configurations and firmware level across multiple servers
• Syslog alerting
• Lenovo SED security key management
• Boot video capture and crash video capture
• Virtual console collaboration - Ability for up to 6 remote users to be log into the remote session simultaneously
• Remote console Java client
• System utilization data and graphic view
• Single sign on with Lenovo XClarity Administrator
• Update firmware from a repository
• Enterprise Strict Security mode - Enforces CNSA 1.0 level security
• Remotely viewing video with graphics resolutions up to 1600x1200 at 75 Hz with up to 23 bits per pixel, regardless of the system state
• Remotely accessing the server using the keyboard and mouse from a remote client
• International keyboard mapping support
• Redirecting serial console via SSH
• Component replacement log (Maintenance History log)
• Access restriction (IP address blocking)
• Displaying graphics for real-time and historical power usage data and temperature
• Mapping the ISO and image files located on the local client as virtual drives for use by the server
• Mounting the remote ISO and image files via HTTPS, SFTP, CIFS, and NFS
• Power capping
• License for XClarity Energy Manager

Topics in this section:

• Security features
• Platform Firmware Resiliency - Lenovo ThinkShield
• Security standards

Security features

The SR850 V4 server offers the following electronic security features:

• Secure Boot function of the Intel Xeon processor
• Support for Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) - see the Platform Firmware Resiliency section
• Firmware signature processes compliant with FIPS and NIST requirements
• System Guard (part of XCC3 Premier) - Proactive monitoring of hardware inventory for unexpected component changes
• Administrator and power-on password
• Integrated Trusted Platform Module (TPM) supporting TPM 2.0
• For China users, optional Nationz TPM 2.0 module
• Self-encrypting drives (SEDs) with support for enterprise key managers - see the SED encryption key management section

The server is NIST SP 800-147B compliant.

The SR850 V4 server also offers the following optional physical security features:

• Optional chassis intrusion switch
• Optional lockable front security bezel

The optional lockable front security bezel is shown in the following figure and includes a key that enables you to secure the bezel over the drives and system controls thereby reducing the chance of unauthorized or accidental access to the server.

Figure 25. Lockable front security bezel

The following table lists the security options for the SR850 V4.

Platform Firmware Resiliency - Lenovo ThinkShield

Lenovo's ThinkShield Security is a transparent and comprehensive approach to security that extends to all dimensions of our data center products: from development, to supply chain, and through the entire product lifecycle.

The ThinkSystem SR850 V4 includes Platform Firmware Resiliency (PFR) hardware Root of Trust (RoT) which enables the system to be NIST SP800-193 compliant. This offering further enhances key platform subsystem protections against unauthorized firmware updates and corruption, to restore firmware to an integral state, and to closely monitor firmware for possible compromise from cyber-attacks.

PFR operates upon the following server components:

• UEFI image – the low-level server firmware that connects the operating system to the server hardware
• XCC image – the management “engine” software that controls and reports on the server status separate from the server operating system
• FPGA image – the code that runs the server’s lowest level hardware controller on the motherboard

The Lenovo Platform Root of Trust Hardware performs the following three main functions:

• Detection – Measures the firmware and updates for authenticity
• Recovery – Recovers a corrupted image to a known-safe image
• Protection – Monitors the system to ensure the known-good firmware is not maliciously written

These enhanced protection capabilities are implemented using a dedicated, discrete security processor whose implementation has been rigorously validated by leading third-party security firms. Security evaluation results and design details are available for customer review – providing unprecedented transparency and assurance.

The SR850 V4 includes support for Secure Boot, a UEFI firmware security feature developed by the UEFI Consortium that ensures only immutable and signed software are loaded during the boot time. The use of Secure Boot helps prevent malicious code from being loaded and helps prevent attacks, such as the installation of rootkits. Lenovo offers the capability to enable secure boot in the factory, to ensure end-to-end protection. Alternatively, Secure Boot can be left disabled in the factory, allowing the customer to enable it themselves at a later point, if desired.

The following table lists the relevant feature code(s).

Security standards

The SR850 V4 supports the following security standards and capabilities:

• Industry Standard Security Capabilities
  • Intel CPU Enablement
    • Intel Trust Domain Extensions (Intel TDX)
    • Intel Crypto Acceleration
    • Intel QuickAssist Software Acceleration
    • Intel Platform Firmware Resilience Support
    • Intel Control-Flow Enforcement Technology
    • Intel Total Memory Encryption - Multi Key
    • Intel Total Memory Encryption
    • Intel AES New Instructions (AES-NI)
    • Intel OS Guard
    • Execute Disable Bit (XD)
    • Intel Boot Guard
    • Mode-based Execute Control (MBEC)
    • Intel Virtualization Technology (VT-x)
    • Intel Virtualization Technology for Directed I/O (VT-d)
  • Microsoft Windows Security Enablement
    • Credential Guard
    • Device Guard
    • Host Guardian Service
  • TCG (Trusted Computing Group) TPM (Trusted Platform Module) 2.0
  • UEFI (Unified Extensible Firmware Interface) Forum Secure Boot
• Hardware Root of Trust and Security
  • Independent security subsystem providing platform-wide NIST SP800-193 compliant Platform Firmware Resilience (PFR)
  • Management domain RoT supplemented by the Secure Boot features of XCC
• Platform Security
  • Boot and run-time firmware integrity monitoring with rollback to known-good firmware (e.g., “self-healing”)
  • Non-volatile storage bus security monitoring and filtering
  • Resilient firmware implementation, such as to detect and defeat unauthorized flash writes or SMM (System Management Mode) memory incursions
  • Patented IPMI KCS channel privileged access authorization (USPTO Patent# 11,256,810)
  • Host and management domain authorization, including integration with CyberArk for enterprise password management
  • KMIP (Key Management Interoperability Protocol) compliant, including support for IBM SKLM and Thales KeySecure
  • Reduced “out of box” attack surface
  • Configurable network services
  • FIPS 140-3 (in progress) validated cryptography for XCC
  • CNSA Suite 1.0 Quantum-resistant cryptography for XCC
  • Lenovo System Guard

  For more information on platform security, see the paper “How to Harden the Security of your ThinkSystem Server and Management Applications” available from https://lenovopress.com/lp1260-how-to-harden-the-security-of-your-thinksystem-server.

• Standards Compliance and/or Support
  • NIST SP800-131A rev 2 “Transitioning the Use of Cryptographic Algorithms and Key Lengths”
  • NIST SP800-147B “BIOS Protection Guidelines for Servers”
  • NIST SP800-193 “Platform Firmware Resiliency Guidelines”
  • ISO/IEC 11889 “Trusted Platform Module Library”
  • Common Criteria TCG Protection Profile for “PC Client Specific TPM 2.0”
  • European Union Commission Regulation 2019/424 (“ErP Lot 9”) “Ecodesign Requirements for Servers and Data Storage Products” Secure Data Deletion
  • Optional FIPS 140-2 validated Self-Encrypting Disks (SEDs) with external KMIP-based key management
• Product and Supply Chain Security
  • Suppliers validated through Lenovo’s Trusted Supplier Program
  • Developed in accordance with Lenovo’s Secure Development Lifecycle (LSDL)
  • Continuous firmware security validation through automated testing, including static code analysis, dynamic network and web vulnerability testing, software composition analysis, and subsystem-specific testing, such as UEFI security configuration validation
  • Ongoing security reviews by US-based security experts, with attestation letters available from our third-party security partners
  • Digitally signed firmware, stored and built on US-based infrastructure and signed on US-based Hardware Security Modules (HSMs)
  • Manufacturing transparency via Intel Transparent Supply Chain (for details, see https://lenovopress.com/lp1434-introduction-to-intel-transparent-supply-chain-on-lenovo-thinksystem-servers)
  • TAA (Trade Agreements Act) compliant manufacturing, by default in Mexico for North American markets with additional US and EU manufacturing options
  • US 2019 NDAA (National Defense Authorization Act) Section 889 compliant

The following table lists the rack installation options that are available for the SR850 V4.

For supported racks, see the Rack cabinets section.

See the Rail Kit comparison for the specifications of each rail kit:
https://lenovopress.lenovo.com/lp1838-thinksystem-and-thinkedge-rail-kit-reference#availability=Available&sr850-v4-support=SR850%2520V4

The SR850 V4 supports the following operating systems:

• Microsoft Windows Server 2022
• Microsoft Windows Server 2025
• Red Hat Enterprise Linux 9.6
• Red Hat Enterprise Linux 10.0
• SUSE Linux Enterprise Server 15 SP7
• Ubuntu 22.04 LTS 64-bit
• Ubuntu 24.04 LTS 64-bit
• VMware ESXi 9.0

For a complete list of supported, certified and tested operating systems, plus additional details and links to relevant web sites, see the Operating System Interoperability Guide: https://lenovopress.lenovo.com/osig#servers=sr850-v4-xeon-6-p-cores-7djt-7djs-7dju&support=all

For configure-to-order configurations, the SR850 V4 can be preloaded with VMware ESXi. Ordering information is listed in the following table.

Configuration rule:

• An ESXi preload cannot be selected if the configuration includes an NVIDIA GPU (ESXi preload cannot include the NVIDIA driver)

You can download supported VMware vSphere hypervisor images from the following web page and install it using the instructions provided:
https://vmware.lenovo.com/content/custom_iso/

The SR850 V4 has the following overall physical dimensions, excluding components that extend outside the standard chassis, such as EIA flanges, front security bezel (if any), and power supply handles:

• 2.5-inch chassis:
  • Width: 447 mm (17.6 inches)
  • Height: 87 mm (3.4 inches)
  • Depth: 906 mm (35.7 inches)
• E3.S chassis:
  • Width: 447 mm (17.6 inches)
  • Height: 87 mm (3.4 inches)
  • Depth: 946 mm (37.2 inches)

The following table lists the detailed dimensions. See the figure below for the definition of each dimension.

Figure 26. Server dimensions

The server has the following weight:

• Maximum weight: 42 kg (92.6 lb)

The server has the following electrical specifications for AC input power supplies:

• Input voltage:
  • 200 to 240 (nominal) Vac, 50 Hz or 60 Hz
  • 180 to 300 Vdc (China only)
• Inlet current: see the following table.

Electrical specifications for -48V DC input power supply, 4P57A88625:

• Input voltage: -48 to -60 Vdc
• Inlet current: 29.8 A

Electrical specifications for HVAC/HVDC power supply, 4P57A88627:

• Input voltage ranges:
  • 200-277V AC single phase
  • 240-380V DC
• Inlet current:
  • AC: 7.2 A
  • DC: 6.2 A

The SR850 V4 server complies with ASHRAE Class A2 specifications with most configurations, and depending on the hardware configuration, also complies with ASHRAE Class A3 and Class A4 specifications. System performance may be impacted when operating temperature is outside ASHRAE A2 specification.

Depending on the hardware configuration, the SR850 V4 server also complies with ASHRAE Class H1 specification. System performance may be impacted when operating temperature is outside ASHRAE H1 specification.

Topics in this section:

• Temperature and humidity
• Acoustical noise emissions
• Shock and vibration
• Particulate contamination

Water requirements

The SR850 V4 has the following requirements for open-loop liquid cooling:

• Maximum pressure: 3 bars
• Water inlet temperature and flow rates for Compute Complex Neptune Core Module:
  • 45°C (113°F) inlet temperature: 1 liter per minute (lpm) per server
• Water inlet temperature and flow rates for Processor Neptune Core Module:
  • 50°C (122°F) inlet temperature: 1.5 liters per minute (lpm) per server
  • 45°C (113°F) inlet temperature: 1 liter per minute (lpm) per server
  • 40°C (104°F) or lower inlet temperature: 0.5 liters per minute (lpm) per server

The water required to initially fill the system side cooling loop must be reasonably clean, bacteria-free water (<100 CFU/ml) such as de-mineralized water, reverse osmosis water, de-ionized water, or distilled water. The water must be filtered with an in-line 50 micron filter (approximately 288 mesh). The water must be treated with anti-biological and anti-corrosion measures. Environment quality must be maintain over the lifetime of the system to receive warranty and support on affecting components. For more information, see Lenovo Neptune Direct Water-Cooling Standards.

Temperature and humidity

The server is supported in the following environment:

• Air temperature:
  • Operating:
    • ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient temperature decreases by 1°C for every 300 m (984 ft) increase in altitude above 900 m (2,953 ft).
    • ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient temperature decreases by 1°C for every 175 m (574 ft) increase in altitude above 900 m (2,953 ft).
    • ASHRAE Class A4: 5°C to 45°C (41°F to 113°F); the maximum ambient temperature decreases by 1°C for every 125 m (410 ft) increase in altitude above 900 m (2,953 ft).
    • ASHRAE Class H1: 5 °C to 25 °C (41 °F to 77 °F); Decrease the maximum ambient temperature by 1°C for every 500 m (1640 ft) increase in altitude above 900 m (2,953 ft).
  • Server off: -10°C to 60°C (14°F to 140°F)
  • Shipment/storage: -40°C to 70°C (-40°F to 158°F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
  • Operating
    • ASHRAE Class A2: 8% to 80%; maximum dew point: 21°C (70°F)
    • ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
    • ASHRAE Class A4: 8% to 90%; maximum dew point: 24°C (75°F)
    • ASHRAE Class H1: 8% to 80%; Maximum dew point: 17°C (63°F)
  • Shipment/storage: 8% to 90% 

Acoustical noise emissions

The server has the following acoustic noise emissions declaration.

• Sound power level (L_WAd) (Statistical adder for verification, Kv (B) = 0.4):
  • Idling: Typical: 6.5 Bel, Max: 6.5 Bel
  • Operating 1: Typical: 7.0 Bel, Max: 7.7 Bel
  • Operating 2: Typical: 7.7 Bel, Max: 8.3 Bel
• Sound pressure level (L_pAm) (Bystander position):
  • Idling: Typical: 53 dBA, Max: 53 dBA
  • Operating 1: Typical: 57 dBA, Max: 65 dBA
  • Operating 2: Typical: 65 dBA, Max: 71 dBA

Modes:

• Idle mode is the steady state in which the server is powered on but not operating any intended function
• Operating mode 1 is 50% CPU TDP
• Operating mode 2 is 100% CPU TDP.

The declared acoustic sound levels are based on the following configurations, which may change depending on configuration/conditions:

• Typical configuration: four 270W processors, thirty-two 64GB RDIMMs, eight SAS hard disk drives, one RAID 545-8i, one Intel E610-T4 10GBASE-T 4-port OCP, two 2000W power supply units.
• Max configuration: four 350W processors, sixty-four 64GB RDIMMs, twenty-four SAS hard disk drives, one RAID 545-32i, two Intel E610-T4 10GBASE-T 4-port OCPs, two 3200W power supply units.

Notes:

• These sound levels were measured in controlled acoustical environments according to procedures specified by ISO7779 and are reported in accordance with ISO 9296.
• The declared sound levels may change depending on configuration/conditions.
• Government regulations (such as those prescribed by OSHA or European Community Directives) may govern noise level exposure in the workplace and may apply to you and your server installation. The actual sound pressure levels in your installation depend upon a variety of factors, including the number of racks in the installation; the size, materials, and configuration of the room; the noise levels from other equipment; the room ambient temperature, and employee's location in relation to the equipment. Further, compliance with such government regulations depends on a variety of additional factors, including the duration of employees' exposure and whether employees wear hearing protection. Lenovo recommends that you consult with qualified experts in this field to determine whether you are in compliance with the applicable regulations.

The following specifications indicate the limits of particulates that the system can tolerate:

• Reactive gases:
  • The copper reactivity level shall be less than 200 Angstroms per month (Å/month)
  • The silver reactivity level shall be less than 200 Å/month
• Airborne particulates:
  • The room air should be continuously filtered with MERV 8 filters.
  • Air entering a data center should be filtered with MERV 11 or preferably MERV 13 filters.
  • The deliquescent relative humidity of the particulate contamination should be more than 60% RH
  • Environment must be free of zinc whiskers

For additional information, see the Specifications section of the documentation for the server, available from the Lenovo Documents site, https://pubs.lenovo.com/

The Lenovo Processor Neptune Core Module is the liquid-based processor cooling offering for the SR850 V4, as described in the Lenovo Processor Neptune Core Module section.

The open-loop cooling module requires the following water infrastructure components in the rack cabinet and data center:

• Supported 42U or 48U rack cabinet

  The 42U or 48U Heavy Duty Rack Cabinet (machine types 7D6D or 7D6E) are supported. Two 0U mounting points are required for the water manifolds, at the rear of the rack cabinet, one either side.

  For information about the 42U and 48U Heavy Duty Rack Cabinets, see the product guide:
  https://lenovopress.lenovo.com/lp1498-lenovo-heavy-duty-rack-cabinets

• 38-port water manifold (machine type 7DE6), installed in the rear of the rack cabinet

  The manifold provides quick-disconnect couplings that each server in the rack are connected to. Ordering information is in the table below.

• Coolant distribution unit (CDU), either in-rack or in-row

  In-rack CDUs are installed at the bottom of the rack cabinet. The supported in-rack CDU is as follows:

  • Lenovo Neptune DWC RM100 In-Rack CDU; see the RM100 In-Rack Coolant Distribution Unit section

  In-row CDUs are separate cabinets that are typically installed at the end of a row of rack cabinets. Examples of suitable in-row CDUs include (but not limited to):

  • CoolTera FS400 310KW CDU
  • Vertiv Liebert XDU60 60KW CDU
• Hose kit to connect to the CDU to the manifold

  Ordering information is in the table below.

The following figure shows the major components of the solution.

Figure 27. Water manifold connections

Configuration requirements:

• Maximum number of SR850 V4 servers supported in a rack:
  • 48U rack: 19 servers
  • 42U rack with in-rack CDU: 18 servers
  • 42U rack without in-rack CDU: 19 servers
• Inlet water flow rate:
  • 0.5 LPM: Maximum 40°C inlet water temperature
  • 1.0 LPM: Maximum 45°C inlet water temperature
  • 1.5 LPM: Maximum 50°C inlet water temperature
• Water pressure requirement:
  • Maximum operating node inlet pressure = 43.5 psi (3 bars)

The 38-drop water manifold and hoses can be ordered as listed in the following table.

Configuration notes:

• This water connection solution described here cannot be used with the DW612S and N1380 enclosures as the water requirements are different.
• The hoses for in-row CDUs that are listed in the table above have Eaton FD83 quick-disconnect couplings

The SR850 V4 has a 1-year or 3-year warranty based on the machine type of the system:

• 7DJT,  - 1 year warranty
• 7DJS, 7DJU - 3 year warranty

For more information, consult the brochure Lenovo Operational Support Services for Data Centers Services.

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  Protect sensitive data and maintain compliance with corporate retention and disposal policies to ensure your data is always under your control, regardless of the number of drives that are installed in your Lenovo server.

• Technical Account Manager (TAM)

  Your single point of contact to expedite service requests, provide status updates, and furnish reports to track incidents over time, ensuring smooth operations and optimized performance as your business grows.

• Enterprise Software Support (ESS)

  Gain comprehensive, single-source, and global support for a wide range of server operating systems and Microsoft server applications.

For more information, consult the brochure Lenovo Operational Support Services for Data Centers.

Lenovo Managed Services

Achieve peak efficiency, high security, and minimal disruption with Lenovo's always-on Managed Services. Our real-time monitoring, 24x7 incident response, and problem resolution ensure your infrastructure operates seamlessly. With quarterly health checks for ongoing optimization and innovation, Lenovo's remote active monitoring boosts end-user experience and productivity by keeping your data center's hardware performing at its best.

Lenovo Managed Services provides continuous 24x7 remote monitoring (plus 24x7 call center availability) and proactive management of your data center using state-of-the-art tools, systems, and practices by a team of highly skilled and experienced Lenovo services professionals.

Quarterly reviews check error logs, verify firmware & OS device driver levels, and software as needed. We’ll also maintain records of latest patches, critical updates, and firmware levels, to ensure you systems are providing business value through optimized performance.

Lenovo Sustainability Services

• Asset Recovery Services

  Lenovo Asset Recovery Services (ARS) provides a secure, seamless solution for managing end-of-life IT assets, ensuring data is safely sanitized while contributing to a more circular IT lifecycle. By maximizing the reuse or responsible recycling of devices, ARS helps businesses meet sustainability goals while recovering potential value from their retired equipment. For more information, see the Asset Recovery Services offering page.

• CO2 Offset Services

  Lenovo’s CO2 Offset Services offer a simple and transparent way for businesses to take tangible action on their IT footprint. By integrating CO2 offsets directly into device purchases, customers can easily support verified climate projects and track their contributions, making meaningful progress toward their sustainability goals without added complexity.

• Lenovo Certified Refurbished

  Lenovo Certified Refurbished offers a cost-effective way to support IT circularity without compromising on quality and performance. Each device undergoes rigorous testing and certification, ensuring reliable performance and extending its lifecycle. With Lenovo’s trusted certification, you gain peace of mind while making a more sustainable IT choice.

Lenovo TruScale XaaS is your set of flexible IT services that makes everything easier. Streamline IT procurement, simplify infrastructure and device management, and pay only for what you use – so your business is free to grow and go anywhere.

Lenovo TruScale is  the unified solution that gives you simplified access to:

• The industry’s broadest portfolio – from pocket to cloud – all delivered as a service
• A single-contract framework for full visibility and accountability
• The global scale to rapidly and securely build teams from anywhere
• Flexible fixed and metered pay-as-you-go models with minimal upfront cost
• The growth-driving combination of hardware, software, infrastructure, and solutions – all from one single provider with one point of accountability.

For information about Lenovo TruScale offerings that are available in your region, contact your local Lenovo sales representative or business partner.

The SR850 V4 conforms to the following standards:

• ANSI/UL 62368-1
• CE, UKCA Mark (EN55032 Class A, EN62368-1, EN55035, EN61000-3-11, EN61000-3-12, (EU) 2019/424, and EN IEC 63000 (RoHS))
• FCC - Verified to comply with Part 15 of the FCC Rules, Class A
• Canada ICES-003, issue 7, Class A
• CISPR 32, Class A, CISPR 35
• Korea KS C 9832 Class A, KS C 9835
• Japan VCCI, Class A
• Taiwan BSMI CNS15936, Class A; CNS15598-1; Section 5 of CNS15663
• Australia/New Zealand AS/NZS CISPR 32, Class A; AS/NZS 62368.1
• China CELP certificate, HJ 2507-2011

The server supports attachment to external drive enclosures using a RAID controller with external ports or a SAS host bus adapter. Adapters supported by the server are listed in the SAS adapters for external storage section.

Note: Information provided in this section is for ordering reference purposes only. For the operating system and adapter support details, refer to the interoperability matrix for a particular storage enclosure that can be found on the Lenovo Data Center Support web site:
http://datacentersupport.lenovo.com

Lenovo offers the ThinkSystem DE Series, ThinkSystem DG Series and ThinkSystem DM Series external storage systems for high-performance storage. See the DE Series, DG Series and DM Series product guides for specific controller models, expansion enclosures and configuration options:

• ThinkSystem DE Series Storage
  https://lenovopress.com/storage/thinksystem/de-series#rt=product-guide
• ThinkSystem DM Series Storage
  https://lenovopress.com/storage/thinksystem/dm-series#rt=product-guide
• ThinkSystem DG Series Storage
  https://lenovopress.com/storage/thinksystem/dg-series#rt=product-guide

The following table lists the external backup options that are offered by Lenovo.

For more information, see the list of Product Guides in the Backup units category:
https://lenovopress.com/servers/options/backup

Lenovo offers the ThinkSystem DB Series of Fibre Channel SAN switches for high-performance storage expansion. See the DB Series product guides for models and configuration options:

• ThinkSystem DB Series SAN Switches:
  https://lenovopress.com/storage/switches/rack#rt=product-guide

The following table lists the uninterruptible power supply (UPS) units that are offered by Lenovo.

For more information, see the list of Product Guides in the UPS category:
https://lenovopress.com/servers/options/ups

The following table lists the power distribution units (PDUs) that are offered by Lenovo.