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2U Rack AMD Servers

ThinkSystem SR665


The Lenovo ThinkSystem SR665 is a 2-socket 2U server that features the AMD EPYC 7002 “Rome” and AMD EPYC 7003 “Milan” families of processors. With up to 64 cores per processor and support for the new PCIe 4.0 standard for I/O, the SR665 offers the ultimate in two-socket server performance in a 2U form factor. The server is ideal for dense workloads that can take advantage of GPU processing and high-performance NVMe drives.

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SKU 09-ThinkSystem-SR665 Categories , , , , ,

2U Rack AMD Servers

ThinkSystem SR665


The Lenovo ThinkSystem SR665 is a 2-socket 2U server that features the AMD EPYC 7002 “Rome” and AMD EPYC 7003 “Milan” families of processors. With up to 64 cores per processor and support for the new PCIe 4.0 standard for I/O, the SR665 offers the ultimate in two-socket server performance in a 2U form factor. The server is ideal for dense workloads that can take advantage of GPU processing and high-performance NVMe drives.

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Walkthrough video with David Watts and Russ Resnick

Did you know?

The SR665 server is a very configuration-rich offering, supporting 28 different drive bay configurations in the front, middle and rear of the server and 5 different slot configurations at the rear of the server. This level of flexibility ensures that you can configure the server exactly the way your workload requires.

The server has been designed to take advantage of the features of the EPYC 7002 and EPYC 7003 processors, such as the full performance of 280W 64-core processors, support for 3200 MHz memory and PCIe Gen 4.0 support. Competitive servers that are based on the older EPYC 7001 “Naples” designs may not be able to offer these performance features.

Key features

Combining performance and flexibility, the SR665 server is a great choice for enterprises of all sizes. The server offers a broad selection of drive and slot configurations and offers high performance features that industries such as finance, healthcare and telco need. Outstanding reliability, availability, and serviceability (RAS) and high-efficiency design can improve your business environment and can help save operational costs.

Scalability and performance

The SR665 offers numerous features to boost performance, improve scalability and reduce costs:

  • Supports the AMD EPYC 7002 and EPYC 7003 families family of processors
  • Supports processors with up to 64 cores and 128 threads, core speeds of up to 4.1 GHz, and TDP ratings of up to 280W.
  • Support for up to 32 TruDDR4 memory DIMMs with two processors (16 DIMMs per processor). Each processor has 8 memory channels and 2 DIMMs per channel. With 1 DIMM installed per channel (8 DIMMs total), memory operates at 3200 MHz. Using Performance+ RDIMMs, the server supports 2 DIMMs per channel (16 DIMMs total) operating at 3200 MHz.
  • Using 256GB 3DS RDIMMs, the server supports up to 8TB of system memory.
  • Supports up to eight single-width GPUs or three double-wide GPUs, for substantial processing power in a 2U system.
  • Supports up to 40x 2.5-inch hot-swap drive bays, by using combinations of front-accessible (up to 24 bays), mid bays (8 bays) and rear-accessible (8 bays).
  • Supports 20x 3.5-inch drive bays for lower-cost high-capacity HDD storage. 2.5-inch and 3.5-inch drive bays can be mixed if desired.
  • Supports 16x NVMe drives without oversubscription of PCIe lanes (1:1 connectivity), or up to 32 NVMe drives with a 1:2 oversubscription. The use of NVMe drives maximizes drive I/O performance, in terms of throughput, bandwidth, and latency.
  • Supports 12x SATA drives using the onboard SATA controller (no additional adapter needed), enabling lower cost, high capacity storage solution for cold storage workloads.
  • Supports high-speed RAID controllers from Broadcom providing 12 Gb SAS connectivity to the drive backplanes. A variety of PCIe 3.0 and PCIe 4.0 RAID adapters are available.
  • Supports up to two externally accessible 7mm hot-swap drives with RAID functionality for operating system boot functions or data storage
  • Supports M.2 drives for convenient operating system boot functions or data storage. Available M.2 adapters support either one M.2 drive or two M.2 drives in a RAID 1 configuration for performance and reliability.
  • The server has a dedicated industry-standard OCP 3.0 small form factor (SFF) slot, with a PCIe 4.0 x16 interface, supporting a variety of Ethernet network adapters. Simple-swap mechanism with thumbscrews and pull-tab enables tool-less installation and removal of the adapter. Supports shared BMC network sideband connectivity to enable out-of-band systems management.
  • The server offers PCI Express 4.0 I/O expansion capabilities that doubles the theoretical maximum bandwidth of PCIe 3.0 (16GT/s in each direction for PCIe 4.0, compared to 8 GT/s with PCIe 3.0). A PCIe 4.0 x16 slot provides 64 GB/s bandwidth, enough to support a 200GbE network connection.
  • Up to eight PCIe 4.0 slots, all with rear access, plus an internal bay for a cabled RAID adapter or HBA, plus a slot dedicated to the OCP adapter.

Availability and serviceability

The SR665 provides many features to simplify serviceability and increase system uptime:

  • The server uses ECC memory and supports memory RAS features including Single Device Data Correction (SDDC, also known as Chipkill), Patrol/Demand Scrubbing, DRAM Address Command Parity with Replay, and DRAM Uncorrected ECC Error Retry.
  • The server offers hot-swap drives, supporting RAID redundancy for data protection and greater system uptime.
  • Available M.2 RAID Boot Adapters support RAID-1 which can enable two SATA or two NVMe 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 power-source-independent light path diagnostics 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 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, flash storage adapters), 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 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, 9 x 5 next business day. Optional service upgrades are available.

Manageability and security

Systems management features simplify local and remote management of the SR665:

  • The server includes an XClarity Controller (XCC) to monitor server availability. Optional upgrade to XCC Advanced to provide remote control (keyboard video mouse) functions. Optional upgrade to XCC Enterprise enables the additional support for the mounting of remote media files (ISO and IMG image files), boot capture, and power capping.
  • 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
  • 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 AMD Secure Root-of-Trust, Secure Run and Secure Move features to minimize potential attacks and protect data as the OS is booted, as applications are run and as applications are migrated from server to server.
  • Supports Secure Boot to ensure only a digitally signed operating system can be used.
  • Industry-standard Advanced Encryption Standard (AES) NI support for faster, stronger encryption.
  • Additional physical security features are a chassis intrusion switch (standard in all models) and a lockable front bezel (optional).

Energy efficiency

The SR665 offers the following energy-efficiency features to save energy, reduce operational costs, and increase energy availability:

  • Energy-efficient planar components help lower operational costs.
  • High-efficiency power supplies with 80 PLUS Platinum and Titanium certifications
  • Low-voltage 1.2 V DDR4 memory offers energy savings compared to 1.35 V and 1.5 V DDR3 DIMMs.
  • Solid-state drives (SSDs) consume as much as 80% less power than traditional spinning 2.5-inch HDDs.
  • 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.
  • Optional Lenovo XClarity Energy Manager provides advanced data center power notification and analysis to help achieve lower heat output and reduced cooling needs.

Components and connectors

The following figure shows the front of the server.

Front view of the Lenovo ThinkSystem SR665
Figure 2. Front view of the Lenovo ThinkSystem SR665

The following figure shows the components visible from the rear of the server. The figure shows one configuration, with eight PCIe slots, however there are additional rear configurations which include 3.5-inch drive bays, 2.5-inch drive bays, or 7mm drive bays.

Rear view of the Lenovo ThinkSystem SR665
Figure 3. Rear view of the Lenovo ThinkSystem SR665 (configuration with eight PCIe slots)

The following figure shows the locations of key components inside the server.

Internal view of the Lenovo ThinkSystem SR665
Figure 4. Internal view of the Lenovo ThinkSystem SR665

System architecture

The following figure shows the architectural block diagram of the SR665, showing the major components and their connections.

SR665 system architectural block diagram
Figure 5. SR665 system architectural block diagram

Standard specifications

The following table lists the standard specifications.

Table 1. Standard specifications
Components Specification
Machine types 7D2W – 1 year warranty
7D2V – 3 year warranty
Form factor 2U rack.
Processor One or two AMD EPYC 7002 Series processors (formerly codenamed “Rome”) or AMD EPYC 7003 Series processors (formerly codenamed “Milan”). Supports processors up to 64 cores, core speeds of up to 4.1 GHz, and TDP ratings of up to 280W.
Chipset Not applicable (platform controller hub functions are integrated into the processor)
Memory 32 DIMM slots with two processors (16 DIMM slots per processor). Each processor has 8 memory channels, with 2 DIMMs per channel (DPC). Lenovo TruDDR4 RDIMMs and 3DS RDIMMs are supported:

  • Performance+ RDIMMs: 1 DPC at 3200 MHz, 2 DPC at 3200 MHz
  • RDIMMs: 1 DPC at 3200 MHz, 2 DPC at 2933 MHz
  • 3DS RDIMMs: 1 DPC at 2933 MHz, 2 DPC at 2666 MHz
Memory maximum Up to 8TB with 32x 256GB 3DS RDIMMs
Persistent memory Not supported.
Memory protection ECC, SDDC, Patrol/Demand Scrubbing, DRAM Address Command Parity with Replay, DRAM Uncorrected ECC Error Retry, Post Package Repair
Disk drive bays Up to 20x 3.5-inch or 40x 2.5-inch hot-swap drive bays:

  • Front bays can be 3.5-inch (8 or 12 bays) or 2.5-inch (8, 16 or 24 bays)
  • Middle bays can be 3.5-inch (4 bays) or 2.5-inch (8 bays)
  • Rear bays can be 3.5-inch (2 or 4 bays) or 2.5-inch (4 or 8 bays)
  • Combinations of SAS/SATA, NVMe, or AnyBay (supporting SAS, SATA or NVMe) are available

The server also supports these drives for OS boot or drive storage:

  • Two 7mm drives at the rear of the server (in addition to any 2.5-inch or 3.5-inch drive bays)
  • Internal M.2 module supporting up to two M.2 drives

See Supported drive bay combinations for details.

Maximum internal storage
  • 2.5-inch drives:
    • 614.4TB using 40x 15.36TB 2.5-inch SAS/SATA SSDs
    • 491.52TB using 32x 15.36TB 2.5-inch NVMe SSDs
    • 96TB using 40x 2.4TB 2.5-inch HDDs
  • 3.5-inch drives:
    • 400TB using 20x 20TB 3.5-inch HDDs
    • 153.6TB using 20x 7.68TB 3.5-inch SAS/SATA SSDs
    • 76.8TB using 12x 6.4TB 3.5-inch NVMe SSDs
Storage controller
  • Onboard NVMe and NVMe Switch Adapters (no RAID)
  • Onboard SATA (no RAID)
  • 12 Gb SAS/SATA RAID adapters:
    • RAID 530i-8i (cacheless) supports RAID 0, 1, 10, 5, 50
    • RAID 530i-16i (cacheless) supports RAID 0, 1, 10
    • RAID 930-8i with 2GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
    • RAID 930-16i with 4GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
    • RAID 940-8i with 4GB or 8GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
    • RAID 940-16i with 4GB or 8GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
    • RAID 940-32i with 8GB flash-backed cache supports RAID 0, 1, 10, 5, 50, 6, 60
  • 12 Gb SAS/SATA non-RAID:
    • 430-8i or 440-8i HBAs
    • 430-16i or 440-16i HBAs
Optical drive bays No internal optical drive.
Tape drive bays No internal backup drive.
Network interfaces Dedicated OCP 3.0 SFF slot with PCIe 4.0 x16 host interface. Supports a variety of 2-port and 4-port adapters with 1GbE, 10GbE and 25GbE network connectivity. One port can optionally be shared with the XClarity Controller (XCC) management processor for Wake-on-LAN and NC-SI support.
PCI Expansion slots Up to 8x PCIe 4.0 slots, all full height slots and with rear access, plus a slot dedicated to the OCP adapter. Slot availability is based on riser selection and rear drive bay selection. Slots 4-8 require two processors.

Slots are configured using three riser cards. Riser 1 (slots 1-3) and Riser 2 (slots 4-6) are installed in slots in the system board, Riser 3 (slots 7-8) is cabled to ports on the system board.

A variety of riser cards are available. See the I/O expansion for details.

For 2.5-inch front drive configurations, the server supports the installation of a RAID adapter or HBA in a dedicated area that does not consume any of the PCIe slots.

Ports Front: 1x USB 3.1 G1 (5 Gb/s) port, 1x USB 2.0 port (also for XCC local management), External diagnostics port, optional VGA port.

Rear: 3x USB 3.1 G1 (5 Gb/s) ports, 1x VGA video port, 1x RJ-45 1GbE systems management port for XCC remote management. Optional DB-9 COM serial port (installs in slot 3).

Internal: 1x USB 3.1 G1 connector for operating system or license key purposes

Cooling Up to 6x N+1 redundant hot swap 60 mm fans, configuration dependent. One fan integrated in each power supply.
Power supply Up to two hot-swap redundant AC power supplies, 80 PLUS Platinum or 80 PLUS Titanium certification. 500 W, 750 W, 1100 W and 1800 W AC options, supporting 220 V AC. 500 W, 750 W and 1100 W options also support 110V input supply. In China only, all power supply options support 240 V DC. Also available is a 1100W power supply with a -48V DC input.
Video G200 graphics with 16 MB memory with 2D hardware accelerator, integrated into the XClarity Controller. Maximum resolution is 1920×1200 32bpp at 60Hz.
Hot-swap parts Drives, power supplies, and fans.
Systems management Operator panel with status LEDs. Optional External Diagnostics Handset with LCD display. Models with 8x or 16x 2.5-inch front drive bays can optionally support an Integrated Diagnostics Panel. XClarity Controller (XCC) embedded management, XClarity Administrator centralized infrastructure delivery, XClarity Integrator plugins, and XClarity Energy Manager centralized server power management. Optional XClarity Controller Advanced and Enterprise to enable remote control functions.
Security features Chassis intrusion switch, Power-on password, administrator’s password, Trusted Platform Module (TPM), supporting TPM 2.0. Servers with EPYC 7002 processors also support TPM 1.2. In China only, optional Nationz TPM 2.0. Optional lockable front security bezel.
Operating systems supported Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi. See the Operating system support section for specifics.
Limited warranty Three-year or one-year (model dependent) customer-replaceable unit and onsite limited warranty with 9×5 next business day (NBD).
Service and support Optional service upgrades are available through Lenovo Services: 4-hour or 2-hour response time, 6-hour fix time, 1-year or 2-year warranty extension, software support for Lenovo hardware and some third-party applications.
Dimensions Width: 445 mm (17.5 in.), height: 87 mm (3.4 in.), depth: 764 mm (30.1 in.). See Physical and electrical specifications for details.
Weight Maximum: 38.8 kg (85.5 lb)

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