Lenovo ThinkSystem Rack Server Memory: SR630, SR650, SR665 & More

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Memory upgrades for Lenovo ThinkSystem one- and two-socket rack servers, including the GPU and AI rack platforms. 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 SR650 V2, SR630, SR665 V3 or SR670 V2. 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: SR630 V4, SR650 / SR650a V4, SR680a V4.

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

DDR5 RDIMM: SR630 V3, SR650 V3, SR680a V3, SR780a V3, HS350X V3.

AMD EPYC 9004 and 9005 (V3)

DDR5 RDIMM: SR635 V3, SR645 V3, SR655 V3, SR665 V3, SR675 V3, SR685a V3.

3rd Gen Intel Xeon Scalable (V2)

DDR4-3200 RDIMM: SR630 V2, SR650 V2, SR670 V2.

AMD EPYC 7002 and 7003

DDR4-3200 RDIMM: SR635, SR645, SR655, SR665.

1st and 2nd Gen Intel Xeon Scalable

DDR4-2933 RDIMM: SR530, SR550, SR570, SR590, SR630, SR650, SR670.

Entry, Intel Xeon E

ECC UDIMM: SR250 V3, SR250 V2, SR250.

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 rack refresh or a spares pool, or send us your Lenovo machine type and we will confirm the right module before you order.

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