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| Model | ThinkSystem SR635 V3 |
| Customization Intention | Customers Can Freely Choose Specific Configurations |
| Form Factor | 1U rack server |
| 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. |
| Chipset | Not applicable (platform controller hub functions are integrated into the processor) |
| 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 |
| 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 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). |
| Maximum internal storage | * 2.5-inch drives: * 368.64TB using 12x 30.72TB 2.5-inch SAS/SATA SSDs * 737.28TB using 12x 61.44TB 2.5-inch NVMe SSDs * 28.8TB using 12x 2.4TB 2.5-inch HDDs * 7.68TB using 2x 3.84TB 7mm SSDs * EDSFF drives * 122.88TB using 16x 7.68TB E1.S EDSFF NVMe SSDs |
| Storage controller | * Onboard NVMe (no RAID) - 16 drives, each x4 * Onboard SATA (no RAID) - 12 drives * 12 Gb SAS/SATA RAID adapters * 8 or 16 ports * Up to 8GB flash-backed cache * PCIe 4.0 or PCIe 3.0 host interface * 12 Gb SAS/SATA HBA (non-RAID) * 8-port and 16-port * PCIe 4.0 or PCIe 3.0 host interface |
| Optical drive bays | No internal optical drive. |
| Tape drive bays | No internal backup drive. |
| 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. |
| PCIe 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 4x single-wide GPUs |
| 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 2nd XCC remote management port (installs in OCP slot). Optional DB-9 COM serial port (installs in slot 3). Internal: 1x USB 3.1 G1 (5 Gb/s) connector for operating system or license key purposes. |
| 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. |
| Video | Embedded video graphics with 16 MB memory with 2D hardware accelerator, integrated into the XClarity Controller. Maximum resolution is 1920x1200 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 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 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 | Chassis intrusion switch, Power-on password, administrator's password, Root of Trust module supporting TPM 2.0 and Platform Firmware Resiliency (PFR). Optional lockable front security bezel. |
| Operating systems supported | Microsoft Windows Server, Microsoft Windows 10 & 11, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi, Ubuntu Server. See the Operating system support section for specifics. |
| Limited warranty | Three-year 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. |
| Weight | Maximum: 20.2 kg (44.6 lb) |
| Size | Width: 440 mm (17.3 in.), height: 43 mm (1.7 in.), depth: 773 mm (30.4 in.). |
The Lenovo ThinkSystem SR635 V3 is a 1-socket 1U server that features the 5th Gen AMD EPYC 9005 Series "Turin" family of processors. With up to 160 processor cores and support for the PCIe Gen5 standard for I/O, the SR635 V3 offers the ultimate in one-socket server performance in a 1U form factor.
This product guide provides essential pre-sales information to understand the ThinkSystem SR635 V3 server, its key features and specifications, components and options, and configuration guidelines. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the SR635 V3 and consider its use in IT solutions.
