Lenovo ThinkSystem Mission-Critical Server Memory: SR850, SR860 & SR950

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Memory upgrades for Lenovo ThinkSystem four- and eight-socket mission-critical servers, built for SAP HANA, in-memory databases and large consolidation projects. Each listing covers one server model and generation, using the memory type, speed and module sizes Lenovo specifies for it. The fastest way to find yours is to type the Lenovo model into the search bar at the top of the page, for example SR850 V2, SR860, SR950 or SR860 V4. The model name is on the front bezel or pull-out label, and the machine type (a four-character code such as 7X06) is on the system label and in Lenovo XClarity.

Intel Xeon 6 (V4)

DDR5-6400 RDIMM: SR850 V4, SR860 V4.

4th and 5th Gen Intel Xeon Scalable (V3)

DDR5 RDIMM: SR850 V3 / SR860 V3, SR950 V3.

3rd Gen Intel Xeon Scalable (V2)

DDR4-3200 RDIMM: SR850 V2, SR860 V2.

1st and 2nd Gen Intel Xeon Scalable

DDR4-2933 RDIMM: SR850, SR860, SR950.

Total capacity on these systems depends on the processor: on 1st and 2nd Gen Intel Xeon Scalable, more than 768GB or 1TB per processor needs an M- or L-suffix processor, and each listing states the platform maximum.

Memory rules across ThinkSystem servers

Match the generation: DDR5 servers (V3 and V4) take only DDR5 RDIMMs; DDR4 servers (V2 and earlier) take only DDR4. The modules are keyed differently and will not seat.
Registered or unbuffered, never both: rack, mission-critical and dense servers take registered memory (RDIMM, 3DS RDIMM or LRDIMM); the Xeon E entry servers (SR250, ST250, ST50, ST45) take ECC unbuffered UDIMMs.
Use one module size and type per server and populate the matched channel groups Lenovo specifies for each processor: six or eight channels per processor on Intel Xeon Scalable, eight or twelve on AMD EPYC.
Each listing names the speeds Lenovo rates for that system; faster modules clock down automatically.

Buying in volume direct from NEMIX RAM

NEMIX RAM is a US-based server memory specialist, in business since 1993. Every module is researched, matched, and compatibility-tested by NEMIX RAM, is JEDEC-compliant, and is backed by a lifetime warranty. Purchase orders, net terms and volume pricing are available for data centers, HPC sites, universities, government buyers and resellers. Request a quote for a full four- or eight-socket memory set, or send us your Lenovo machine type and we will confirm the right module before you order.

More Lenovo memory: all Lenovo server memory · rack servers · tower servers · dense and HPC servers · ThinkEdge edge servers · Lenovo OEM part numbers · ThinkStation workstations