Technical specifications
Lenovo ThinkSystem SR650 — Full Technical Specifications
The SR650 is Lenovo's two-socket workhorse rack server from the Skylake and Cascade Lake years — the model that carried most of the company's enterprise volume in that period and the one its later generations are all measured against. It is a capable, unfussy machine with a deserved reputation for accepting accelerators that its competitors of the same vintage would not.
We list a new build and refurbished units.
Official datasheet
Original spec sheet © Vendor. Hosted by hardwaresys for buyer reference. Specifications subject to vendor’s published documentation.
Full Specifications
The accelerator row on this sheet is longer than anything else in its generation, and that is the reason to pick this chassis over a contemporary: a rack server that takes several cards without special arrangements is still useful for work nobody had thought of when it was bought. Read the memory row carefully though, since the three module types quoted reach three different ceilings and the highest of them depends on a memory technology tied to a specific processor family. The bay row includes rear positions that are easy to overlook and useful for separating boot from data. Management is Lenovo's own controller, licensed in tiers — check which tier a unit carries.
| CPU Sockets | 2 |
| CPU Family | Intel Xeon Scalable (1st Gen Skylake / 2nd Gen Cascade Lake), LGA 3647, up to 28 cores, up to 205W TDP |
| Chipset | Intel C624 |
| Max RAM | 3 TB (RDIMM), 1.5 TB (LRDIMM), 6 TB (with DCPMM in Memory Mode) |
| DIMM Slots | 24 TruDDR4 (12 per CPU) |
| Memory Type | TruDDR4 2666/2933 MHz RDIMM, LRDIMM, 3DS RDIMM; DCPMM 128/256/512 GB |
| Drive Bays | Up to 24 x 2.5" hot-swap SAS/SATA/NVMe, or up to 12 x 3.5" hot-swap SAS/SATA; rear: up to 2 x 3.5" SAS/SATA; M.2: up to 2 |
| Storage Controller | RAID 530-8i/730-8i/930-8i/16i/940-8i/16i, HBA 430/440; Intel VROC for NVMe |
| Network | LOM up to 4x 1/10 GbE; ML2 adapters 10/25 GbE; 1 GbE management port |
| PSU | Up to 2x redundant hot-swap: 550W/750W/1100W AC 80 PLUS Platinum/Titanium |
| Form Factor | 2U rack-mount |
| Management | Lenovo XClarity Controller (Standard/Advanced/Enterprise), IPMI 2.0, Redfish |
| Dimensions | 482 x 86.5 x 763.7 mm (W x H x D) with rack latches |
| Weight | Up to 32.0 kg |
| GPU Support | Up to 5 GPUs: NVIDIA T4, A2, P4, P6, P40, P100, V100, A100, A16, A30, RTX A6000 etc. |
| Cooling | Up to 6 hot-swap dual-rotor fans (N+1 redundancy) |
| PCIe Slots | Up to 8 PCIe 3.0 slots (via risers) + 1 dedicated RAID slot |
| Operating Environment | ASHRAE A2 (10-35°C) |
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We source this chassis OEM-new or refurbished, QC-inspected and shipped door-to-door. Quote-only pricing.