Lenovo ThinkSystem SR635 V3 — supported memory

1U 1S, AMD EPYC 9004 (Genoa/Bergamo) or EPYC 9005 (Turin). 12 DIMM slots (12 memory channels per CPU, 1 DIMM per channel). TruDDR5 RDIMMs incl. 3DS, 10x4 and 9x4 variants (no LRDIMM/MRDIMM listed). Speeds CPU-dependent: up to 4800 MHz with 4th Gen EPYC 9004, up to 6400 MHz with 5th Gen EPYC 9005 (6400 requires specific DIMMs + latest firmware); a 5600 MHz-rated 128GB RDIMM is offered but runs at 4800 with 9004. Up to 256 GB per DIMM / up to 3 TB total (12x 256 GB 3DS RDIMM).

Confirmed = listed in the vendor's memory documentation for this server. Vendor match = the vendor's own part cross-reference matches the module and its speed is validated for the platform; not taken from this server's memory list. Spec match = meets this platform's JEDEC requirements (generation, form factor, validated speed); interchangeability is spec-based, not per-server testing. How we verify →