The SK hynix HMCG88AHBRA472N is a high-performance 64GB DDR5-6400 ECC Registered DIMM (RDIMM) designed for compatible enterprise servers, data-center platforms, and professional computing environments. The exact part number is identified as a 64GB DDR5-6400B RDIMM with 2Rx8 organization and a 288-pin form factor.
With a rated data transfer speed of 6400 MT/s, the HMCG88AHBRA472N provides high memory bandwidth for modern server platforms. Its DDR5 architecture makes it suitable for workloads that require fast and reliable access to system memory, including virtualization, cloud computing, databases, enterprise applications, analytics, and other demanding workloads.
The module provides 32GB of memory capacity in a single DIMM, allowing compatible servers to increase their total memory capacity while preserving additional DIMM slots for future upgrades. This makes the HMCG88AHBRA472N a practical choice for enterprise systems where both memory capacity and bandwidth are important.
ECC Registered Server Memory
The HMCG88AHBRA472N uses ECC (Error-Correcting Code) technology, which is designed to detect and correct certain types of memory errors. ECC memory is commonly used in enterprise servers and data-center systems where data integrity, system stability, and reliable operation are important.
It is also a Registered DIMM (RDIMM). Registered memory uses register circuitry to help manage the electrical load between the memory controller and the DRAM devices. RDIMM architecture is intended for compatible server platforms and should not be confused with standard desktop UDIMM or laptop SO-DIMM memory.
DDR5-6400 Performance
The HMCG88AHBRA472N is rated at DDR5-6400 / 6400 MT/s, corresponding to PC5-51200. Exact-MPN listings identify it as a 32GB PC5-51200B-R DDR5-6400B Registered ECC module. It is also listed with CL52 latency and 1.1V operating voltage.
The actual memory speed achieved in a server can depend on the processor, BIOS, server generation, number of installed DIMMs, DIMM population configuration, and other platform limitations.
2Rx8 Dual-Rank Architecture
The HMCG88AHBRA472N uses a 2Rx8 dual-rank organization. This is an important technical specification when determining server compatibility and planning DIMM population.
The exact SK hynix part number is listed as DDR5-6400B 2Gx80 RDIMM 2Rx8 (32GB).
Enterprise Server Applications
The HMCG88AHBRA472N is well suited for compatible systems used in:
- Enterprise servers
- Data centers
- Cloud computing
- Server virtualization
- Database servers
- Application servers
- Web servers
- Enterprise software
- Data analytics
- Virtual desktop infrastructure
- High-performance computing
- Professional computing
- Business-critical applications
- Memory-intensive workloads
The exact HMCG88AHBRA472N has been documented in real-world enterprise server configurations. SPEC benchmark records show this exact 32GB SK hynix module operating at 6400 MT/s in systems including HPE ProLiant Compute DL380 Gen12, as well as HPE ProLiant DL345 Gen11 and Lenovo ThinkSystem platforms.
High-Speed DDR5 Memory for Modern Servers
DDR5-6400 provides substantially higher memory bandwidth than many previous-generation server memory configurations. For compatible platforms, this can help support workloads involving large datasets, virtualization, enterprise applications, and high-throughput computing.
The 32GB capacity also makes this module useful when configuring servers with multiple DIMMs to achieve larger overall memory capacities.
Compatibility
Because the HMCG88AHBRA472N is a DDR5 ECC Registered RDIMM, it should only be installed in systems specifically designed to support DDR5 RDIMM memory.
Before purchasing, customers should verify:
- Server model
- Processor generation
- DDR5 RDIMM support
- 32GB DIMM support
- 2Rx8 configuration
- DDR5-6400 support
- Maximum supported system memory
- DIMM population requirements
- BIOS and firmware compatibility
The server may operate the module at a lower frequency depending on its processor, DIMM population, and platform configuration.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | SK hynix |
| Manufacturer Part Number | HMCG88AHBRA472N |
| Capacity | 32GB |
| Memory Generation | DDR5 |
| Memory Type | ECC Registered DIMM |
| Module Type | RDIMM |
| Speed | 6400 MT/s |
| Memory Standard | DDR5-6400 |
| Bandwidth | PC5-51200 |
| Organization | 2Rx8 / Dual Rank |
| ECC | Yes |
| Registered | Yes |
| CAS Latency | CL52 |
| Voltage | 1.1V |
| Pin Count | 288-pin |
| Form Factor | DIMM |
| Application | Enterprise Server / Data Center |
| Condition | Refurbished |
| Warranty | 1 Year |
| Availability | In Stock |
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