About the Lenovo ThinkSystem SR650 V4
The Lenovo ThinkSystem SR650 V4 is the mainstream 2U, two-socket rack server built around Intel's latest Xeon 6 (6700/6500-series) Performance-core processors, scaling to 86 cores per socket — 172 cores and 172 threads across a fully populated system — at up to 350W each. With 32 DDR5 DIMM slots across eight channels per CPU it reaches 8TB of memory, and uniquely supports MRDIMMs at up to 8000 MHz plus CXL 2.0 memory expansion (up to 12 CXL DIMMs in E3.S 2T bays) for bandwidth-hungry databases, virtualisation and in-memory workloads. Three drive-bay zones deliver up to 40x 2.5-inch, 16x 3.5-inch or 32x E3.S hot-swap bays, backed by Intel VROC, tri-mode and 12Gb SAS/SATA RAID.
Expansion is generous for a 2U chassis: up to 10 PCIe 5.0 slots, two OCP 3.0 slots driving up to 400 GbE, and support for up to 10 single-width or 2 double-width GPUs. Cooling ranges from five or six hot-swap 60mm fans to Lenovo's Neptune open-loop liquid cooling for the processors — or the Compute Complex module that also cools memory and voltage regulators. Management runs on XClarity Controller 3 with OpenBMC, secured by a Root of Trust module with TPM 2.0 and Platform Firmware Resiliency, and powered by redundant 800W to 3200W Platinum/Titanium supplies. Servnet configures, prices and supplies the SR650 V4 in the UK, with every specification here verified against the Lenovo Press product guide.
Lenovo ThinkSystem SR650 V4 — FAQs
How many processor cores does the SR650 V4 support?
It takes one or two Intel Xeon 6700/6500-series P-core processors, up to 86 cores each — so a fully populated dual-socket system reaches 172 cores and 172 threads, with TDP up to 350W per CPU.
What is the maximum memory and does it support MRDIMM or CXL?
The server has 32 DDR5 DIMM slots (16 per CPU, 8 channels each) for up to 8TB using 256GB 3DS RDIMMs. It also supports MRDIMMs at up to 8000 MHz for extra bandwidth and CXL 2.0 memory expansion in E3.S 2T bays.
How much storage and how many GPUs can it hold?
Across front, mid and rear zones it supports up to 40x 2.5-inch, 16x 3.5-inch or 32x E3.S hot-swap drives, plus up to 10 single-width or 2 double-width GPUs and up to 10 PCIe 5.0 slots.
Request a quote for the Lenovo ThinkSystem SR650 V4
Tell us your workload and we’ll spec and price it — or build it yourself in the configurator.
Talk to a UK specialist
Get expert advice or a no-obligation quote — servers, storage, networking, maintenance, finance and cloud. We reply the same working day.