About the Lenovo ThinkSystem SR650a V4
The Lenovo ThinkSystem SR650a V4 is a GPU-optimised 2U rack server built around one or two Intel Xeon 6700P or 6500P-series processors, scaling to 86 cores per socket and 8TB of TruDDR5 memory across 32 DIMM slots. Its defining feature is front-mounted accelerator capacity: up to four 400W or two 600W double-wide PCIe 5.0 GPUs, or eight single-wide cards, with supported models including NVIDIA H200 NVL, L40S and L4. The slot layout also lets two GPUs be paired over high-speed NVLink. That makes it a genuine AI training and inference platform in a mainstream 2U footprint, backed by up to eight 2.5-inch or E3.S NVMe hot-swap bays, PCIe 5.0 expansion, dual OCP 3.0 networking and optional Neptune Core direct-to-chip water cooling for the processors.
Management runs on Lenovo XClarity Controller 3 (XCC3) with TPM 2.0, Platform Firmware Resiliency and Secure Boot for a hardened firmware chain, while redundant 80 PLUS Platinum/Titanium power supplies up to 3200W feed the dense GPU load. It suits AI lifecycle, VDI, content delivery and high-density scale-out deployments. Servnet configures, prices and supplies the ThinkSystem SR650a V4 in the UK, with every specification here verified against the Lenovo Press product guide.
Lenovo ThinkSystem SR650a V4 — FAQs
How many GPUs does the ThinkSystem SR650a V4 support?
It supports up to four 400W double-wide GPUs, or two 600W double-wide GPUs, or eight single-wide GPUs, all front-mounted. Supported models include NVIDIA H200 NVL (600W), L40S (350W) and L4. The slot layout also allows two GPUs to be connected over high-speed NVLink.
Which processors and how much memory does it take?
One or two Intel Xeon 6700P or 6500P-series (Granite Rapids) CPUs, up to 86 cores and 350W TDP each. It has 32 DDR5 DIMM slots (16 per CPU, 8 channels, 2 DIMMs per channel) for up to 8TB using 256GB 3DS RDIMMs, with RDIMM speeds to 6400MHz (1DPC) and MRDIMM support to 8000MHz (1DPC).
What storage and cooling options are available?
The front supports up to 8x 2.5-inch SAS/SATA/NVMe or 8x E3.S NVMe hot-swap drives, plus 2x M.2 boot devices, reaching up to 491.52TB of raw NVMe. Cooling uses N+1 60mm hot-swap fans, with an optional Processor Neptune Core Module providing open-loop direct-to-chip water cooling for the processors.
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