[ REGISTERED ECC SERVER MODULE // MEMORY / RAM ]
SK hynix HMA84GR7CJR4N-XN
SK hynix HMA84GR7CJR4N-XN is a 32 GB DDR4-3200 dual-rank x4 registered ECC module for supported server memory channels.
PART ID: HMA84GR7CJR4N-XN. This is a specific manufacturer module, not a generic DIMM standard. Verify full label, revision and SPD data on the specimen before using it for a service or compatibility decision.
Module specifications
| Manufacturer / part number | SK hynix HMA84GR7CJR4N-XN |
|---|---|
| Module class | 288-pin DDR4 ECC Registered DIMM (RDIMM) |
| Capacity | 32 GB per module |
| Memory generation / data rate | DDR4-3200 (3200 MT/s; PC4-25600) |
| Error correction / buffering | System-level ECC module; registered/buffered command-address interface (RDIMM) |
| Rank / device organization | 2Rx4 (dual rank, x4 DRAM organization); x4 DRAM organization; dual-rank module |
| Timing / voltage | CL22, per module listing; nominal module voltage 1.2 V |
| Form factor | 288-pin DDR4 ECC Registered DIMM (RDIMM); contact count and keying are generation-specific |
| Compatibility | Use only in a DDR4 server/workstation whose CPU, firmware and board explicitly support 32 GB ECC RDIMMs and the module density/rank. The 3200 MT/s label is a module rating, not a guarantee of the configured host rate. |
Platform compatibility & service notes
Use only in a DDR4 server/workstation whose CPU, firmware and board explicitly support 32 GB ECC RDIMMs and the module density/rank. The 3200 MT/s label is a module rating, not a guarantee of the configured host rate.
- Match DDR generation, ECC and registered buffering independently; a mechanically similar UDIMM or LRDIMM is not interchangeable unless the host documentation explicitly allows it.
- Confirm CPU memory-controller capability, firmware, supported rank and DRAM density, maximum capacity per slot, and channel population rules in the server service manual and qualified-memory list.
- The printed transfer rate is a module rating. The configured rate can be lower because of the CPU, number of DIMMs per channel, ranks, firmware policy or other installed modules.
- Power down and follow the host service procedure. Use ESD precautions, handle by the edges and keep the original label and SPD record with the archived specimen.
Archival fields
Record the complete SKU, suffix and revision/date code; photograph both module sides; preserve SPD data, host model and CPU, BIOS/BMC version, socket/channel location, memory-test results and any ECC event counters. Reconfirm all traits against the physical sample because component revisions may vary.
Product sources & compatibility reference
- SK hynix HMA84GR7CJR4N-XN — NewEgg listingProduct listing identifies the 32 GB 3200 MT/s 2Rx4 ECC RDIMM SKU.
- CoreWave Labs — HMA84GR7CJR4N-XN specificationsIndependent module-level specification and server RDIMM classification.
- Intel Xeon E5 processor families — memory system referenceExample host-platform reference for server memory. It does not qualify this exact SKU; the platform vendor’s service manual and QVL determine actual compatibility.
Model facts are taken from the linked part listings/datasheet. Server compatibility is conditional and must be checked against the actual CPU, board, firmware and server population guide.