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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 64 GB |
| Memory Technology | DDR5 |
| RAM Speed | 6400 MHz |
| RAM Standard | DDR5-6400/PC5-51200 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL52 |
| Rank | Dual Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
Designed specifically for server-class platforms, this 64GB DDR5-6400 Registered DIMM with ECC ensures rock-solid data integrity and stability for memory-intensive workloads such as virtualization, in-memory databases, and enterprise analytics. Its dual-rank x4 organization maximizes interleaving efficiency to sustain high bandwidth even under heavy concurrent access, while the registered signal type enables robust operation in high-density, multi-DIMM configurations.
1. ECC memory actively corrects single-bit errors, safeguarding transactional databases and financial computations from silent data corruption that could otherwise cascade into critical outages.
2. Registered signal buffering stabilizes command and address lines, allowing dense server configurations to scale memory capacity without compromising signal integrity under heavy multi-socket workloads.
3. DDR5-6400 doubled burst length pumps massive bandwidth into each memory channel, accelerating in-memory analytics and real-time inference engines that choke on slower generations.
4. Dual Rank x4 organization interleaves bank groups across ranks, saturating the memory bus during high thread concurrency and keeping virtual machine response times predictable under dense consolidation.
5. A dense module capacity eliminates the need to sacrifice memory slots for future scaling, giving hypervisors room to pack more tenant VMs per node while maintaining comfortable memory headroom.
The M321R8GA0PB2-CCPEC is an enterprise DDR5 RDIMM that transforms technical specifications into real-world resilience. With 6400MT/s, it delivers 51.2 GB/s of bandwidth, a must for in-memory databases like Redis or SAP HANA where faster throughput means instant analytics and quicker customer responses. The 64GB capacity and Dual Rank x4 architecture let you consolidate more virtual machines per server without hitting a performance wall, because rank interleaving keeps the memory pipeline full and responsive. Registered buffering ensures signal integrity across all populated DIMM slots, so a fully loaded dual-socket EPYC or Xeon board stays stable under 24/7 operation—no more troubleshooting mysterious memory errors during peak loads. And integrated ECC silently corrects single-bit errors caused by cosmic rays, turning what could be a corrupted financial ledger or a rogue hypervisor crash into a non-event. For virtualized clusters and data-heavy applications, this module means unshakeable data integrity and maximum uptime.
Capacity Planning Guide for DDR5-6400 Registered ECC Memory
This 64GB DDR5-6400 RDIMM with ECC and dual-rank x4 organization is purpose‑built for enterprise servers. Its high capacity and signal integrity under registered clocking suit dense, mission‑critical workloads. Below are recommendations for common server scenarios.
General Virtualization
Populate modules symmetrically across all processor memory channels to maximise interleaving and avoid NUMA imbalances. In a dual‑socket server with eight channels per CPU, installing one 64GB DIMM per channel (total 1TB) provides balanced bandwidth and capacity for 50–100 typical virtual machines. Always use identical modules to maintain stable memory speed and consistent latency.
In‑Memory Database
Fill every DIMM slot with matching 64GB RDIMMs to reach the platform’s maximum capacity, often 2TB–4TB per node. While two DIMMs per channel may reduce speed to 5600 MT/s, the ability to fit entire datasets in RAM for SAP HANA or Redis far outweighs the modest speed trade‑off. The dual‑rank modules enhance bank‑level parallelism, boosting transaction throughput.
High Performance Computing
For bandwidth‑sensitive simulations, install only one DIMM per channel (e.g., eight modules on an 8‑channel board for 512GB) to sustain the full 6400 MT/s data rate. Should the workload demand massive capacity to keep large models memory‑resident, scale to two DIMMs per channel and accept the speed step‑down; the performance gain from avoiding disk I/O will dominate the cluster’s runtime.
Rigorously tested server memory validated for Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.
Q: Can I mix this M321R8GA0PB2-CCPEC with other memory modules of different brands or speeds?
A: Mixing RDIMMs of different brands, speeds, or ranks is not recommended. It can lead to instability and performance degradation. Use identical modules per channel for guaranteed compatibility and reliable operation in server environments.
Q: Is this memory compatible with my system? (Intel Xeon Scalable / AMD EPYC platforms)
A: This DDR5-6400 64GB RDIMM is validated for current-generation Intel Xeon Scalable (Sapphire Rapids/Emerald Rapids) and AMD EPYC 9004 Series platforms. Verify your motherboard's QVL or chipset support for registered ECC DDR5 modules.
Q: What is the recommended DIMM population order for optimal performance?
A: Populate memory channels symmetrically, starting with the primary slot for each channel (e.g., A1, B1, C1). For dual-socket systems, balance total capacity across sockets as per your platform's memory population guide to maximize bandwidth.
Q: Does this module support overclocking or XMP profiles?
A: No. Server-class registered ECC memory adheres strictly to JEDEC standards for maximum reliability. Overclocking and XMP profiles are not supported; this module operates at its specified timings of DDR5-6400 CL52.
Q: What warranty and typical failure rate can I expect?
A: This module includes a one-year limited warranty covering manufacturing defects. Enterprise-grade registered DIMMs exhibit very low annualized failure rates (AFR), typically well under 1% under normal server operating conditions.