- CTO base part number
- 7D9GCTOHWW
- Ordering-code scope
- Machine Type/Model for AI and HPC
- Documented ordering description
- ThinkSystem SR635 V3 - 3yr Warranty for AI
- Platform in this guide
- ThinkSystem SR635 V3
- Form factor
- 1U rack.
- Processor
- One AMD EPYC processor, either 5th Gen 9005 ("Turin") or 4th Gen 9004 ("Genoa"). Supports processors up to 160 cores, core speeds of up to 4.1 GHz, and TDP ratings of up to 400W. Supports PCIe 5.0 for high performance I/O.
- Memory
- 12 DIMM slots. The processor has 12 memory channels, with 1 DIMM per channel (DPC). Lenovo TruDDR5 RDIMMs, 3DS RDIMMs, and 9x4 RDIMMs are supported. Memory speeds up to 6400 MHz with 5th Gen AMD EPYC processors.
- Memory maximum
- Up to 3TB with 12x 256GB 3DS RDIMMs
- 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 12x 2.5-inch hot-swap drive bays: Front bays can be one of the following: 4x 2.5-inch hot-swap SAS/SATA or NVMe 8x 2.5-inch hot-swap SAS/SATA 10x 2.5-inch hot-swap SAS/SATA, AnyBay or NVMe, or combinations 16x E1.S hot-swap EDSFF NVMe Rear can be one of the following: 2x 2.5-inch hot-swap SAS/SATA bays 2x 2.5-inch hot-swap NVMe bays 2x 7mm 2.5-inch hot-swap SATA bays 2x 7mm 2.5-inch hot-swap NVMe bays Internal M.2 module supporting up to two M.2 drives, for OS boot and drive storage support Note: The SR635 V3 does not offer 3.5-inch drive bays. See Storage configurations for details. AnyBay bays support SAS, SATA or NVMe drives. NVMe bays only support NVMe drives. Rear drive bays can be used in conjunction with 2.5-inch front drive bays. The server supports up to 12x NVMe drives all with direct connections (no oversubscription).
- Network interfaces
- Dedicated OCP 3.0 SFF slot with PCIe 5.0 x16 host interface, either at the rear of the server (rear-accessible) or the front of the server (front-accessible). 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 2 (XCC2) management processor for Wake-on-LAN and NC-SI support. Additional PCIe network adapters supported in PCIe slots.
- PCI Expansion slots
- Up to 5x PCIe slots: Rear: Up to 3x PCIe slots plus a slot dedicated to an OCP adapter. Slot availability is based on riser selection and rear drive bay selection. Front: Two PCIe slots plus a slot dedicated to an OCP adapter. Front OCP slot is mutually exclusive with rear OCP slot. Four choices for rear-access slots: 3x PCIe x16 low-profile slots 1x PCIe x16 full-height half-length slot + 1x PCIe x16 low-profile slot 1x PCIe x16 low-profile slot (also supports 2x rear 2.5-inch drive bays) 2x PCIe x16 low-profile slot (also supports 2x rear 7mm 2.5-inch drive bays) For 2.5-inch front drive configurations, the server supports the installation of a CFF RAID adapter or HBA in a dedicated area that does not consume any of the PCIe slots. PCIe slots at the front of the server: OCP slot (mutually exclusive with rear OCP slot) 1x PCIe x16 full-height half-length slot + 1x PCIe x16 low-profile slot
- GPU support
- Supports up to 5x single-wide GPUs
- Cooling
- Up to 7x N+1 redundant hot swap 40 mm fans, configuration dependent. One fan integrated in each power supply. For high-performance CPUs, the SR635 V3 also offers a closed-loop liquid-cooled heatsink design to more effectively remove heat from the processors. For customers with water infrastructure in their data center, the SR635 V3 also offers Lenovo Neptune Core open-loop water cooling for efficient heat removal.
- Power supply
- Up to two hot-swap redundant AC power supplies, 80 PLUS Platinum or 80 PLUS Titanium certification. 750 W, 1100 W and 1800 W AC options, supporting 220 V AC. 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.
- Systems management
- Operator panel with status LEDs. Optional External Diagnostics Handset with LCD display. Models with 8x 2.5-inch front drive bays can optionally support an Integrated Diagnostics Panel. 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. Optional 2nd redundant XCC2 remote port supported, installs in the OCP slot. XClarity One 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.
- Dimensions
- Width: 440 mm (17.3 in.), height: 43 mm (1.7 in.), depth: 773 mm (30.4 in.). See Physical and electrical specifications for details.
- Weight
- Maximum: 20.2 kg (44.6 lb)
- Selection qualification
- CTO is a configuration base code, not a fixed installed BOM. Platform limits do not mean simultaneously installed CPU, RAM, drives or GPUs. Verify machine type, CPU count, memory, backplane, cooling and power. AI/HPC denotes an ordering scope, not included accelerators. Confirm local warranty and supply separately.
Specification schematic, not a product photograph or installation drawing.
Specification schematic, not a product photograph or installation drawing.
Specification schematic, not a product photograph or installation drawing.
Specification schematic, not a product photograph or installation drawing.