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Catalog/Samsung/DDR4 RDIMM/M393A8G40MB2-CTD7Q
Samsung · Server memory

M393A8G40MB2-CTD7Q

Verified

64 GB DDR4-2666 ECC Registered DIMM (RDIMM), dual-rank ×4.

independent sources How we verify →
Specifications JEDEC / manufacturer data
Memory typeDDR43 sources
Module typeRDIMM · ECC Registered DIMM3 sources
Capacity64 GB3 sources
SpeedDDR4-2666 · PC4-213283 sources
Organization / rank2Rx43 sources
CAS latency193 sources
Voltage1.2 VJEDEC standard for DDR4
Form factor288-pin DIMMstandard for DDR4 RDIMM
Fits these servers 12 of 111 platforms
Spec match covers every DDR4 RDIMM platform we track, so the spec-match rows above are a sample across vendors: 99 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
ManufacturerPart numberSpec
KingstonKSM26RD4/64HAR64 GB · DDR4-2666 · RDIMM · 2Rx4
KingstonKSM26RD4/64HCR64 GB · DDR4-2666 · RDIMM · 2Rx4
KingstonKSM26RD4/64MER64 GB · DDR4-2666 · RDIMM · 2Rx4
KingstonKSM26RD4/64MFR64 GB · DDR4-2666 · RDIMM · 2Rx4
SamsungM393A8G40MB2-CTD64 GB · DDR4-2666 · RDIMM · 2Rx4
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
Can I use a Kingston or Samsung module instead?
In most servers, yes: KSM26RD4/64HAR (Kingston), KSM26RD4/64HCR (Kingston), KSM26RD4/64MER (Kingston) match this module on every key specification (64 GB, DDR4-2666, RDIMM, 2Rx4). Keep vendors consistent within a memory bank, and check your server's qualified parts list for edge cases.