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The Lenovo ThinkSystem SR685a V3 is a powerful 8U server that features the 5th Gen AMD EPYC 9005 “Turin” family of processors and eight high-performance GPUs. This air-cooled server is the ultimate Generative AI server, with advanced GPU-to-GPU communications and high-speed PCIe 5.0 connectivity between the GPUs, CPUs, and networking. It was designed fully in-house by Lenovo from ground up to provide best-in-class modularity, thermal performance and reliability.
| Machine types | 7DHC - 3 year warranty |
|---|---|
| Form factor | 8U rack. |
| Processor | Two AMD EPYC processors, either 5th Gen 9005 ("Turin") or 4th Gen 9004 ("Genoa"). Supports processors up to 128 cores, core speeds of up to 3.65 GHz, and TDP ratings of up to 400W. Supports PCIe 5.0 for high performance I/O. |
| GPUs | Choice of: Eight AMD MI300X 750W OAM GPUs with 192GB HBM3 GPU memory per GPU Eight NVIDIA H100 700W SXM5 GPUs with 80GB HBM3 GPU memory per GPU Eight NVIDIA H200 700W SXM5 GPUs with 141GB HBM3 GPU memory per GPU |
| Memory | 24 DIMM slots with two processors (12 DIMM slots per processor). Each processor has 12 memory channels, with 1 DIMM per channel (DPC). Lenovo TruDDR5 RDIMMs and 3DS RDIMMs are supported. Memory speeds up to 6400 MHz with 5th Gen AMD EPYC processors. |
| Memory maximum | Up to 3TB with 24x 128GB RDIMMs or 3DS RDIMMs |
| Persistent memory | Not supported. |
| Memory protection | ECC, SDDC, Patrol/Demand Scrubbing, Bounded Fault, DRAM Address Command Parity with Replay, DRAM Uncorrected ECC Error Retry, On-die ECC, ECC Error Check and Scrub (ECS), Post Package Repair |
| Disk drive bays | Up to 16x 2.5-inch hot-swap drive bays, supporting PCIe 5.0 NVMe drives. |
| OS boot drives | Support for an M.2 adapter with integrated RAID-1; support for 2x NVMe M.2 drives for OS boot and data storage functions |
| Maximum internal storage | 245.76TB using 16x 15.36TB 2.5-inch NVMe SSDs |
| Storage controller | Onboard NVMe (non-RAID) |
| Network interfaces | Supports 8x high-performance network adapters up to 400 Gb/s connectivity with GPU Direct support. Supports a NVIDIA BlueField-3 2-port 200Gb adapter for the User/Control Plane and a choice of OCP network adapter for Management. OCP 3.0 slot has a PCIe 5.0 x16 host interface with one port optionally be shared with the XClarity Controller 2 (XCC2) management processor for Wake-on-LAN and NC-SI support. |
| PCI Expansion slots | 10x PCIe 5.0 x16 slots: Front: 8x PCIe 5.0 x16 FHHL slots with GPU Direct support Rear, choice of: 2x PCIe 5.0 x16 FHHL slots or 1x PCIe 5.0 x16 FHHL slot + 1x OCP 3.0 slot with PCIe 5.0 x16 interface |
| Ports | Front: 1x USB 3.2 G1 (5 Gb/s) port, 1x USB 2.0 port (also for XCC local management), 1x VGA video port. Rear: 3x USB 3.2 G1 (5 Gb/s) ports, 1x VGA video port, 1x RJ-45 1GbE systems management port for XCC remote management. |
| Cooling | 5x front-mounted dual-rotor fans for the CPU and storage subsystem, N+1 redundant. 10x rear-mounted dual-rotor fans for the GPU subsystem, N+1 redundant. One fan integrated in each power supply. Front-to-rear airflow. |
| Power supply | Up to eight hot-swap redundant AC power supplies with up to N+N redundancy. 80 PLUS Titanium certification. 2600 W AC power supplies requiring 220 V AC supply. |
| Video | Embedded video graphics with 16 MB memory with 2D hardware accelerator, integrated into the XClarity Controller. Two video ports (front VGA and rear VGA) however they cannot be used simultaneously; use of the front VGA port disables the rear VGA port. Maximum resolution is 1920x1200 32bpp at 60Hz. |
| Hot-swap parts | Drives, power supplies, and fans. |
| Systems management | Integrated Diagnostics Panel with status LEDs and pull-out LCD display. XClarity Controller 2 (XCC2) embedded management based on the ASPEED AST2600 baseboard management controller (BMC). Dedicated rear Ethernet port for XCC2 remote access for management. XClarity Administrator for centralized infrastructure management, XClarity Integrator plugins, and XClarity Energy Manager centralized server power management. Optional XCC Platinum to enable remote control functions and other features. |
| Security features | Power-on password, administrator's password, Root of Trust module supporting TPM 2.0 and Platform Firmware Resiliency (PFR). |
| Operating systems supported | Ubuntu Server. 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 9x5 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: 447 mm (17.6 in.), height: 351 mm (13.8 in.), depth: 924 mm (36.3 in.). See Physical and electrical specifications for details. |
| Weight | Maximum: 109.4 kg (241 lbs) |
| C1EJ | ThinkSystem SR685a V3 MI300X GPU Base |
|---|---|
| C1EH | ThinkSystem SR685a V3 H100 GPU Base |
| C1EX | ThinkSystem SR685a V3 H200 GPU Base |
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