SK hynix · HMCG94AHBRA486N
SK hynix 64GB DDR5-6400 ECC RDIMM Server Memory
SK hynix HMCG94AHBRA486N is a 64GB DDR5-6400 ECC Registered DIMM with a 2Rx4 organization. For servers and professional workstations that explicitly support DDR5 RDIMM. Actual speed depends on the CPU, motherboard, BIOS and DIMMs-per-channel configuration. Confirm the exact part and platform compatibility list before ordering.
- 64GB per module / DDR5-6400
- 2Rx4 rank and DRAM organization
- ECC Error correction + RDIMM Registered design
- 1.1V nominal / 288-pin DDR5 RDIMM
- Verify exact part, motherboard QVL and channel population
Published model specifications describe available options, not the delivered configuration.
Configurations & prices
Listed price: $2,609.67
Listed prices are indicative; confirm tax, stock, compatibility, lead time and service in a written quotation.
Specifications & selection notes
Core Specifications
| Manufacturer part number | HMCG94AHBRA486N |
|---|---|
| Module capacity | 64 GB |
| Memory generation | DDR5 SDRAM |
| Module type | ECC RDIMM（Registered DIMM / Registered DIMM） |
| Rated data rate | 6400 MT/s；Operating speed depends on platform and population rules。 / Actual rate depends on platform and DIMM population. |
| Rank and DRAM width | 2Rx4（2 Rank，x4 DRAM） |
| ECC Error correction ECC | Supports / Supported |
| Registered design | Supports；RDIMM / Supported; RDIMM |
| Nominal voltage | 1.1 V（Manufacturer/Authorized catalog family documentation；Platform conditions require confirmation / Manufacturer or authorized family literature; confirm platform conditions） |
| Connector pins | 288 pins（DDR5 RDIMM Family specifications / DDR5 RDIMM family specification） |
| Module organization | 8G x 80（Authorized catalog for the applicable part-number family / Corresponding family in the authorized catalog） |
Specification Notes
| Rated-speed note | 5600 / 6400 Means million transfers per second（MT/s），Not the memory clock MHz。 / 5600 / 6400 denotes mega-transfers per second (MT/s), not clock frequency in MHz. |
|---|---|
| Unverified exact-part details | Manufacturer data for this exact part number has not been obtained for CL、Dimensions、Weight and operating-temperature data，No assumption is made；Enquire for confirmation if required。 / Exact-part CAS latency, dimensions, weight and operating temperature have not been verified; confirm if required. |
Platform Compatibility and Installation
| Supported platform | Only for platforms that explicitly support DDR5 ECC RDIMM Servers or professional workstations。 / Only for servers or professional workstations explicitly supporting DDR5 ECC RDIMM. |
|---|---|
| BIOS CPU and BIOS | Check the processor memory controller、BIOS Version and system manufacturer QVL。 / Check the processor memory controller, BIOS version and system-vendor QVL. |
| Rank Capacity and rank | Check the individual module 64GB、2Rx4 And per-slot platform/Total capacity limits。 / Verify 64GB per module, 2Rx4, and platform per-slot/total capacity limits. |
| Channel population | Check DIMMs per channel against the system manual、Slot order and mixed-population restrictions；DIMM population may reduce operating speed。 / Follow DIMMs-per-channel, slot-order and mixing rules; additional DIMMs may reduce operating speed. |
| Non-interchangeable types | Do not treat DDR4、UDIMM、SO-DIMM Or MRDIMM As this model RDIMM Direct replacement。 / DDR4, UDIMM, SO-DIMM and MRDIMM are not direct substitutes for this RDIMM. |
| Ordering details | Provide the system/Motherboard Model、CPU Model、Exact part numbers of existing memory、Quantity and target capacity。 / Provide the system or motherboard, CPU, current memory part numbers, DIMM count and target capacity. |
Sources and Service Notes
| Source checked | 2026-09-17 |
|---|---|
| Evidence scope | Complete part number、Capacity、Data rate and Rank By the server manufacturer AVL Verify；General family parameters come from the memory manufacturer or an authorized catalog。AVL Applies only to the platform and conditions specified in the list。 / Exact part, capacity, rate and rank are verified against server-vendor AVLs. Family specifications come from manufacturer or authorized literature; AVL scope is platform-specific. |
| Manufacturer family page | https://product.skhynix.com/products/dram/module/rdimm.go |
| Platform AVL | https://download-2.msi.com/archive/mnu_exe/server/S4051D270RAU6-X2-AVL.pdf |
| Manufacturer family brochure | https://mis-prod-koce-producthomepage-cdn-01-blob-ep.azureedge.net/web/SK-20230504101812082.pdf |
| Image disclosure | Official DDR5 RDIMM Series illustration；Does not represent the label of this exact part number、Chip layout or shipping appearance。The specification card is a website-created information graphic。 / Official family illustration, not an exact-part label or shipment photo. Specification cards are website-produced explanatory graphics. |
| Compatibility | Verify the full part number before ordering、CPU、Motherboard QVL、BIOS And DIMMs-per-channel population rules。 / Confirm the exact part, CPU, motherboard QVL, BIOS and DIMMs-per-channel rules before ordering. |
| Availability and quotation | Price、Stock、Lead time and exact shipping part number require confirmation。 / Confirm price, stock, lead time and the exact supplied part. |
| Warranty and delivery | Warranty、Packaging、Condition and service scope are subject to the written quotation and contract。 / Warranty, packaging, condition and service scope are subject to the written quotation and contract. |
Product images
Images are references. Components, interfaces and the delivered configuration are specified in the quotation.
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