64 GB DDR5-5600 ECC Registered DIMM (RDIMM), dual-rank ×4. Sold by Dell, HPE, Lenovo and Cisco 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 DDR5 RDIMM platform we track, so the spec-match rows above are a sample across vendors: 24 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 Dell SNP58F8NC/64G the same module as M321R8GA0PB0-CWMCJ?
Yes. Dell resells this Samsung module under part number SNP58F8NC/64G; HPE does the same as P64707-B21, Lenovo does the same as 4X77A88052, Cisco does the same as UCSX-MRX64G2RE3. The physical module is identical: OEM part numbers are branding, not different hardware.
Can I use a Kingston or Micron module instead?
In most servers, yes: 9965788-052.A00G (Kingston), KSM56R46BD4-64HA (Kingston), KSM56R46BD4-64MD (Kingston) match this module on every key specification (64 GB, DDR5-5600, RDIMM, 2Rx4). Keep vendors consistent within a memory bank, and check your server's qualified parts list for edge cases.
What servers take M321R8GA0PB0-CWMCJ?
Cisco UCS C220 M7, Cisco UCS C240 M7, Cisco UCS X210c M7 Compute Node, Dell PowerEdge C6620, among others, match it through the vendor's own part cross-reference (e.g. Dell SNP58F8NC/64G) with a validated speed. Other DDR5 RDIMM platforms generally accept it too; verify against the server's qualified parts list.
