Lenovo ThinkSystem SR655 V3 2U Rack Server
PRODUCT DESCRIPTION
Lenovo ThinkSystem SR655 V3 2U Rack Server (Configure-to-Order) - Local Warranty
2U, Single-Socket AMD EPYC Performance
The Lenovo ThinkSystem SR655 V3 is a 2U, one-socket rack server built on a single AMD EPYC processor: 5th Gen EPYC 9005 with up to 160 cores and 400 W TDP, or 4th Gen EPYC 9004 with up to 128 cores. 12 DDR5 DIMM slots take up to 3 TB of memory at up to 6400 MHz with 5th Gen EPYC.
Storage and GPU Capacity From One Socket
Front, mid and rear bays give up to 20 x 3.5-inch or 40 x 2.5-inch hot-swap drives. Up to 10 PCIe slots, most of them PCIe 5.0, plus an OCP 3.0 slot, and support for up to three double-wide or eight single-width GPUs make it a fit for AI inference, VDI, OLTP, analytics and software-defined storage.
Managed by Lenovo XClarity
XClarity Controller 2 (XCC2) provides embedded out-of-band management, with an optional XCC Platinum upgrade. TPM 2.0, Platform Firmware Resiliency and an optional lockable bezel secure the platform.
Lenovo ThinkSystem SR655 V3 Datasheet — Technical Specifications
General
| Product Name | Lenovo ThinkSystem SR655 V3 Rack Server |
| Machine Types | 7D9E (3-year warranty), 7D9F (1-year warranty) |
| Form Factor | 2U rack server |
| Order Type | Configure-to-Order (CPU, memory, drives, RAID, NIC, PSU and support term chosen per order) |
| Warranty | Three-year or one-year (depending on machine type) customer-replaceable unit and onsite limited warranty, 9x5 next business day; service upgrades selected at configuration |
Processor & Memory
| Processor | One AMD EPYC processor: 5th Gen 9005 (up to 160 cores, up to 400 W TDP) or 4th Gen 9004 (up to 128 cores, up to 360 W TDP) |
| Chipset | None (platform controller functions integrated into the processor) |
| Memory Slots | 12 DDR5 DIMM slots (12 channels, 1 DIMM per channel) |
| Maximum Memory | 3 TB (12 x 256 GB 3DS RDIMMs) |
| Memory Speed | Up to 6400 MHz (5th Gen EPYC); up to 4800 MHz (4th Gen EPYC) |
| Memory Protection | ECC, SDDC, Patrol/Demand Scrubbing, Bounded Fault, DRAM Address Command Parity with Replay |
Storage
| Front Drive Bays | Up to 12 x 3.5" or 24 x 2.5" hot-swap |
| Mid Drive Bays | 4 x 3.5" or 8 x 2.5" hot-swap (optional) |
| Rear Drive Bays | Up to 4 x 3.5" or 8 x 2.5" hot-swap (optional) |
| Total Drive Bays | Up to 20 x 3.5" or 40 x 2.5" hot-swap |
| Maximum Internal Storage | 3,932 TB (32 x 122.88 TB 2.5" NVMe SSDs); 480 TB (20 x 24 TB 3.5" HDDs) |
| Storage Controllers | Onboard SATA and NVMe ports, NVMe retimer/switch adapters, 12 Gb SAS/SATA RAID adapters |
| Optical Drive | No internal optical drive |
Expansion & Networking
| PCIe Slots | Up to 10 PCIe slots (10 rear, or 6 rear + 2 front) plus a dedicated OCP 3.0 slot; up to 9 are PCIe 5.0 |
| GPU Support | Up to 8 x single-width or 3 x double-wide GPUs |
| Network | Dedicated OCP 3.0 SFF slot, PCIe 4.0 x16 interface; 1GbE, 10GbE and 25GbE adapters |
| Front Ports | 1 x USB 3.2 Gen 1, 1 x USB 2.0, diagnostics port |
| Rear Ports | 3 x USB 3.2 Gen 1, 1 x VGA, 1 x RJ-45 management port |
| Video | Embedded graphics with 16 MB memory, up to 1920x1200 32 bpp at 60 Hz |
Management & Security
| Embedded Management | Lenovo XClarity Controller 2 (XCC2); optional XCC Platinum upgrade |
| Security | TPM 2.0, Platform Firmware Resiliency (PFR), chassis intrusion switch, optional lockable bezel |
Power, Cooling & Physical
| Power Supplies | Hot-swap redundant AC PSUs, 80 PLUS Platinum or Titanium: 750 W, 1100 W, 1800 W, 2400 W, 2600 W; -48 V DC option |
| Cooling | Up to 6 x N+1 redundant hot-swap 60 mm fans; optional Lenovo Neptune water cooling |
| Hot-Swap Parts | Drives, power supplies and fans |
| Dimensions (H x W x D) | 87 x 445 x 766 mm |
| Weight | Up to 38.8 kg |
How to Configure Your Server — Sizing Checklist
Servers are built to order. Answer the questions below so we can size the right configuration for you.
Step 1: Hardware Requirements
- Which server form factor do you need: tower or rackmount?
- How many CPU cores, how much RAM and how much usable storage capacity do you require?
- How many processors: single-socket (1S), dual-socket (2S) or four-socket (4S)?
- Which RAID configuration do you need? Any specific HDD or SSD type, such as 7.2K or 10K rpm drives?
- Which network interface is required: 1GbE Base-T, SFP+ or Fibre Channel?
- How many years of maintenance support do you need? (Minimum 3 years)
Step 2: Deployment & Services
- How many server units are required?
- Will you run virtual machine workloads? Do you need a VMware licence, or Windows Server with Hyper-V?
- How do you store data today? Do you have existing NAS or SAN storage?
- How do you back up today? Would you like a backup proposal, such as an IDPA 8TB appliance?
- Do you require burn-in test services?
- Do you need hard disk retention services?
Operating Systems, Management & Workloads
Operating Systems & Hypervisors
Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi and Canonical Ubuntu. Check Lenovo's OS Interoperability Guide for the versions certified on your chosen processor.
Management Tools
XClarity Controller 2 gives out-of-band console, monitoring and alerting from day one, and the XClarity portfolio scales management across multiple ThinkSystem servers.
Typical Workloads
AI inference, VDI, OLTP databases, analytics and software-defined storage.
Package Contents & Lenovo ThinkSystem Servers Ordering Information
What Is Supplied
The SR655 V3 is built to order: chassis with the processor, memory, drives, storage controller, network adapters and power supplies specified on your quotation, plus rail kit, bezel and power cords where ordered.
Lenovo ThinkSystem Servers
| Model | Key feature |
| ThinkSystem ST650 V3 | Tower, 2-socket 4th/5th Gen Intel Xeon |
| ThinkSystem SR250 V3 | 1U, 1-socket Intel Xeon E-2400 |
| ThinkSystem SR630 V3 | 1U, 2-socket 4th/5th Gen Intel Xeon |
| ThinkSystem SR650 V3 | 2U, 2-socket 4th/5th Gen Intel Xeon |
| ThinkSystem SR630 V4 | 1U, 2-socket Intel Xeon 6 |
| ThinkSystem SR650 V4 | 2U, 2-socket Intel Xeon 6 |
| ThinkSystem SR650a V4 | 2U, 2-socket Intel Xeon 6, up to 4 double-wide GPUs |
| ThinkSystem SR645 V3 | 1U, 2-socket AMD EPYC |
| ThinkSystem SR655 V3 (this listing) | 2U, 1-socket AMD EPYC |
| ThinkSystem SR665 V3 | 2U, 2-socket AMD EPYC |
| ThinkSystem SR675 V3 | 3U GPU server, up to 8 GPUs |
| ThinkSystem SR680a V3 | 8U, 8 x NVIDIA SXM GPUs |
| ThinkSystem SR685a V3 | 8U, 8 x NVIDIA SXM or AMD Instinct GPUs |
| ThinkSystem SR780a V3 | 5U, 8 x NVIDIA SXM GPUs, Neptune liquid cooling |
Datasheet & Downloads
| Product guide | Lenovo ThinkSystem SR655 V3 Server Product Guide (Lenovo Press) |
| Datasheet | Lenovo ThinkSystem SR655 V3 Datasheet (Lenovo Press) |
| 3D tour | ThinkSystem SR655 V3 interactive 3D tour |
| Lenovo product page | ThinkSystem SR655 V3 on lenovo.com |
Frequently Asked Questions — Lenovo ThinkSystem SR655 V3
Is this a fixed configuration?
No. The SR655 V3 is configure-to-order. Processor, memory, drives, storage controller, network adapters, power supplies and the support term are specified to your workload; use the sizing checklist above to brief us.
How much memory can it take?
12 DDR5 DIMM slots for up to 3 TB, running at up to 6400 MHz with a 5th Gen AMD EPYC processor.
Why choose a single-socket server?
A single 5th Gen AMD EPYC processor provides up to 160 cores and 12 DDR5 memory channels, so many virtualisation, VDI, database and storage workloads run on one socket.
Does it support GPUs?
Yes, up to three double-wide or eight single-width GPUs.
SR655 V3 or SR665 V3?
Both are 2U AMD EPYC servers with the same drive bay options. The SR655 V3 takes one processor and up to 3 TB of memory; the SR665 V3 takes two processors and up to 6 TB.
