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Catalog/SK hynix/DDR5 RDIMM/HMCT04AGERA199N
SK hynix · Server memory

HMCT04AGERA199N

Verified

128 GB DDR5-5600 ECC Registered DIMM (RDIMM), quad-rank ×4. Sold by Dell and Lenovo under their own part numbers, all cross-referenced below.

independent sources How we verify →
Specifications JEDEC / manufacturer data
Memory typeDDR53 sources
Module typeRDIMM · ECC Registered DIMM3 sources
Capacity128 GB3 sources
SpeedDDR5-5600 · PC5-448003 sources
Organization / rank4Rx4catalog
CAS latency52datasheet + 2 more
Voltage1.1 VJEDEC standard for DDR5
Form factor288-pin DIMMstandard for DDR5 RDIMM
OEM part numbers same module, OEM-branded
VendorOEM part numberVerification
DellSNPGD7H7C/128G✓ verified
Lenovo4X77A92112✓ verified
OEM cross-references are compiled from distributor cross-reference data and OEM documentation. Verify against your vendor's parts list before ordering.
Fits these servers 34 of 65 platforms
Spec match covers every DDR5 RDIMM platform we track, so the spec-match rows above are a sample across vendors: 31 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
SK hynixHMCT04AGERA128 GB · DDR5-5600 · 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
Is Dell SNPGD7H7C/128G the same module as HMCT04AGERA199N?
Yes. Dell resells this SK hynix module under part number SNPGD7H7C/128G; Lenovo does the same as 4X77A92112. The physical module is identical: OEM part numbers are branding, not different hardware.
Can I use a SK hynix module instead?
In most servers, yes: HMCT04AGERA (SK hynix) match this module on every key specification (128 GB, DDR5-5600, RDIMM, 4Rx4). Keep vendors consistent within a memory bank, and check your server's qualified parts list for edge cases.
What servers take HMCT04AGERA199N?
Dell PowerEdge C6620, Dell PowerEdge MX760c, Dell PowerEdge R660, Dell PowerEdge R660xs, among others, match it through the vendor's own part cross-reference (e.g. Dell SNPGD7H7C/128G) with a validated speed. Other DDR5 RDIMM platforms generally accept it too; verify against the server's qualified parts list.