SK Hynix 256GB DDR5 RDIMM
Brand: SK Hynix | Category: Memory (RAM)
SKU: HMAF32GR7AJR4N-XN | Part #: HMAF32GR7AJR4N-XN | MPN: HMAF32GR7AJR4N-XN
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About the SK Hynix 256GB DDR5 RDIMM
SK Hynix 256GB DDR5 RDIMM (part number HMAF32GR7AJR4N-XN) delivers CL40 latency at DDR5-4800 MT/s with ultra-low 1.1V operating voltage—critical specifications for high-frequency trading platforms, in-memory databases, and latency-sensitive analytics workloads. This registered DIMM combines on-die error correction (ODECC) with system-level ECC and Chipkill-level protection via x4 organization, ensuring enterprise-grade reliability across mission-critical deployments. The dual-rank, 288-pin form factor integrates seamlessly into Intel Xeon Scalable and AMD EPYC DDR5-capable architectures, delivering 72-bit bus width (64-bit data + 8-bit ECC) for maximum throughput and fault tolerance.
SK Hynix engineered this module for data center environments requiring both performance and resilience. The 10-layer PCB and JEDEC-compliant Serial Presence Detect (SPD) with RCD ensure plug-and-play compatibility and automatic BIOS configuration. Operating across 0°C to 85°C, the HMAF32GR7AJR4N-XN suits hot-aisle deployments and high-density server configurations. Storage architects and AI infrastructure teams standardize on this capacity and speed grade for large-scale memory consolidation, virtualization clusters, and real-time analytics platforms requiring sub-microsecond response times and zero undetected bit errors.
Typical Enterprise Workloads
- High-frequency trading (HFT) platforms requiring ultra-low latency and deterministic memory access patterns
- In-memory databases (Redis, Memcached) and NoSQL clusters demanding sustained throughput with ECC protection
- Machine learning inference engines and GPU-accelerated compute nodes requiring dense, error-corrected memory
- Virtualization hypervisors (ESXi, KVM) consolidating hundreds of production workloads with isolation guarantees
- Data warehouse and OLAP systems performing real-time aggregations on massive datasets
Contact Omnixon Global for an RFQ on the SK Hynix 256GB DDR5 RDIMM and bulk enterprise pricing.
Technical Specifications
| Brand | SK Hynix |
| Category | Memory (RAM) |
| SKU | HMAF32GR7AJR4N-XN |
| Part Number | HMAF32GR7AJR4N-XN |
| Condition | New |
| Capacity | 256GB |
| Form Factor | RDIMM |
| Speed | 4800 MT/s |
| Manufacturer Part Number | HMAF32GR7AJR4N-XN |
| Capacity | 256GB |
| Memory Type | DDR5 RDIMM (Registered DIMM) |
| Speed Grade | DDR5-4800 |
| Base Clock | 4800 MT/s |
| Form Factor | 288-pin RDIMM |
| Die Organization | x4 |
| Bus Width | 72-bit (64-bit data + 8-bit ECC) |
| ECC Support | On-Die ECC (ODECC) + System-level ECC |
| Operating Voltage | 1.1V (VDD/VDDQ) |
| CAS Latency | CL40 (at DDR5-4800) |
| Rank Configuration | 2Rx4 (Dual Rank) |
| Operating Temperature | 0°C to 85°C (JEDEC standard RDIMM operating range) |
| SPD | JEDEC-compliant Serial Presence Detect (SPD) with RCD |
| PCB Layers | 10-layer |
| Standard Compliance | JEDEC DDR5 RDIMM Specification |
| Compatible Platforms | Intel Xeon Scalable (DDR5-capable), AMD EPYC (DDR5-capable) |
| Error Correction | Chipkill-level correction supported via x4 organization with system ECC |
Frequently Asked Questions about SK Hynix 256GB DDR5 RDIMM
What does the SK Hynix 256GB DDR5 RDIMM do?
The SK Hynix 256GB DDR5 RDIMM is enterprise server memory designed for ECC-protected workloads — virtualization hosts, database servers, analytics platforms, and AI training rigs. SK Hynix validates this module against major server vendor compatibility matrices.
What are the headline specs of the SK Hynix 256GB DDR5 RDIMM?
Key specifications for the SK Hynix 256GB DDR5 RDIMM: new condition; memory type DDR5; memory capacity 256GB; memory speed 4800 MT/s; memory voltage 1.1V; memory form factor RDIMM. Manufacturer part number HMAF32GR7AJR4N-XN. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.