32 GB DDR4-2133 ECC Registered DIMM (RDIMM), dual-rank ×4. Sold by Lenovo, Cisco, Supermicro and Dell under their own part numbers, all cross-referenced below.
OEM cross-references are compiled from distributor cross-reference data and OEM documentation. Verify against your vendor's parts list before ordering.
Spec match covers every DDR4 RDIMM platform we track, so the spec-match rows above are a sample across vendors: 69 further platforms also match this module on spec. A server missing from this table is not a compatibility limit. Browse all servers →
Confirmed = listed in the vendor's memory documentation for that server. Vendor match = the vendor's own part cross-reference matches this module and its speed is validated for the platform; the module is not taken from that server's memory list. Spec match = this module meets the platform's JEDEC requirements (generation, form factor, validated speed); interchangeability is spec-based, not per-server testing. Confirm against your server's qualified parts list before ordering.
Compatible alternatives any brand · same JEDEC specification
Modules match on all key specifications (type, form factor, capacity, speed, rank organization) and are generally interchangeable in servers that accept this spec.
Interchangeability is based on matching JEDEC specifications, not per-server testing. Confirm against your server vendor's qualified parts list.View the full family →
Frequently asked
Is Lenovo 95Y4808 the same module as M393A4K40BB0-CPB0Q?
Yes. Lenovo resells this Samsung module under part number 95Y4808; Cisco does the same as UCS-MR-1X322RU-A, Supermicro does the same as MEM-DR432L-SL01-ER21, Dell does the same as SNPPR5D1C/32G. The physical module is identical: OEM part numbers are branding, not different hardware.
Can I use a Micron or Samsung module instead?
In most servers, yes: MTA36ASF4G72PZ-2G1 (Micron), MTA36ASF4G72PZ-2G1B1RK (Micron), M393A4K40BB0-CPB (Samsung) match this module on every key specification (32 GB, DDR4-2133, RDIMM, 2Rx4). Keep vendors consistent within a memory bank, and check your server's qualified parts list for edge cases.
What servers take M393A4K40BB0-CPB0Q?
Cisco UCS B200 M4, Cisco UCS B200 M5, Cisco UCS C220 M4, Cisco UCS C240 M4, among others, match it through the vendor's own part cross-reference (e.g. Lenovo 95Y4808) with a validated speed. Other DDR4 RDIMM platforms generally accept it too; verify against the server's qualified parts list.
