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Catalog/Samsung/DDR4 RDIMM/M393AAG40M3B-CYF
Samsung · Server memory

M393AAG40M3B-CYF

Verified

128 GB DDR4-2933 ECC Registered DIMM (RDIMM), quad-rank ×4.

independent sources How we verify →
Specifications JEDEC / manufacturer data
Memory typeDDR46 sources
Module typeRDIMM · ECC Registered DIMMdatasheet + 6 more
Capacity128 GB6 sources
SpeedDDR4-2933 · PC4-234646 sources
Organization / rank4Rx45 sources
CAS latency24datasheet + 5 more
Voltage1.2 VJEDEC standard for DDR4
Form factor288-pin DIMMstandard for DDR4 RDIMM
Fits these servers 12 of 111 platforms
ServerFit
Cisco UCS B200 M4Spec match
Cisco UCS B200 M5Spec match
Dell PowerEdge C6420Spec match
Dell PowerEdge C6520Spec match
Fujitsu PRIMERGY RX2530 M4Spec match
Fujitsu PRIMERGY RX2530 M5Spec match
HPE Apollo 6500 Gen10 Plus (XL675d)Spec match
HPE ProLiant BL460c Gen10Spec match
Lenovo ThinkSystem SD530Spec match
Lenovo ThinkSystem SN550Spec match
Supermicro H11 generation (DDR4, AMD EPYC 7001/7002)Spec match
Supermicro H12 generation (DDR4, AMD EPYC 7002/7003)Spec match
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
SamsungM393AAG40M32-CYF128 GB · DDR4-2933 · RDIMM · 4Rx4
SamsungM393AAG40M3B-CYFC0128 GB · DDR4-2933 · RDIMM · 4Rx4
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.
Frequently asked
Can I use a Samsung module instead?
In most servers, yes: M393AAG40M32-CYF (Samsung), M393AAG40M3B-CYFC0 (Samsung) match this module on every key specification (128 GB, DDR4-2933, RDIMM, 4Rx4). Keep vendors consistent within a memory bank, and check your server's qualified parts list for edge cases.