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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 for server environments, this 64GB DDR5-6400 Registered DIMM with ECC delivers the data integrity and signal stability essential for memory-intensive workloads such as virtualization and in-memory databases. Its dual-rank x4 configuration enhances rank interleaving for improved throughput under heavy load, while the registered architecture ensures reliable operation in high-density multi-DIMM configurations.
1. DDR5 technology doubles the prefetch depth over previous generations, feeding modern server CPUs with the sustained throughput needed for large-scale AI inference and containerized microservices.
2. The elevated transfer rate accelerates interleaved memory access across populated channels, shrinking the response time of in-memory caches that anchor high-frequency trading platforms.
3. ECC error correction silently resolves single-bit flips caused by cosmic radiation, safeguarding long-running genomic sequencing pipelines from silent data corruption.
4. Registered logic buffers address and command signals to maintain signal integrity across fully loaded 2DPC configurations, a foundation for dense virtualization hosts that cannot tolerate memory-related downtime.
5. Dual Rank x4 organization leverages bank group interleaving to keep data buses active, delivering predictable latency and bandwidth under the heavy VM consolidation ratios typical of private cloud deployments.
When deploying virtualization clusters or running in-memory databases like SAP HANA, every calculation must be flawless. The M321R8GA0PB2-CCPKF is a 64GB DDR5-6400 Registered DIMM engineered precisely for these workloads, and its four core attributes translate directly into operational resilience. The onboard ECC silently corrects single-bit memory errors before they corrupt transactional data—meaning no silent data corruption during a critical financial batch or a patient record update. Its Registered architecture and 288-pin form factor with a buffer re-drive signals cleanly across fully loaded servers, which lets you populate all 24 DIMM slots without signal degradation, maintaining 6400MT/s bandwidth under maximum density. That 64GB capacity on a single dual-rank x4 module doubles the memory footprint per channel, allowing a virtualized host to run twice the VM instances without throttling. And at PC5-51200 speeds with CL52 latency, the dual-rank interleaving ensures that a large in-memory dataset is accessed with predictable, low-jitter throughput—essential when an analytics query must sweep billions of rows in seconds. This isn't just a module; it's insurance that your scale-out infrastructure keeps processing, keeps auditing, and keeps your customers connected.
This module is a 64GB DDR5-6400 Registered ECC DIMM designed for servers. Below are capacity planning recommendations for typical workload scenarios.
General Virtualization
For a dual‑socket virtualization host, populate at least one DIMM per memory channel to balance capacity and bandwidth. A common configuration is 8 x 64GB (512GB total), leaving room for growth. Always install identical RDIMMs in matched channels to maintain NUMA symmetry and reliable ECC operation.
In‑Memory Database
Maximize capacity and interleaving by fully populating all memory channels with identical modules. For a typical dual‑processor server with 16 slots, install 16 x 64GB (1TB) to keep large datasets resident in memory. Uniform population avoids performance hot‑spots and delivers the sustained low latency that in‑memory engines demand.
High‑Performance Computing
Bandwidth is critical for HPC codes. Use a balanced configuration with one 64GB DIMM per channel—for example, 8 x 64GB per socket—to achieve peak memory bandwidth without exceeding CPU memory rank limits. This yields 512GB–1TB total while keeping dual‑rank x4 modules running at the full 6400MT/s speed for maximum throughput.
Validated for server use: rigorously tested and compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.
Q: Can I mix this M321R8GA0PB2-CCPKF with other memory modules of different brands or speeds?
A: Mixing RDIMMs of different brands, speeds, or ranks may cause system instability or POST failure. For mission-critical servers, we strongly recommend identical modules to ensure signal integrity and validated reliability.
Q: Is this memory compatible with my system?
A: This 64GB DDR5-6400 ECC Registered DIMM is designed for modern server platforms such as 4th Gen Intel Xeon Scalable (Sapphire Rapids) or AMD EPYC 9004 series. Please verify your server board's qualified vendor list.
Q: What is the recommended DIMM population order for optimal performance?
A: Install identical DIMMs in balanced configurations across all available memory channels. Typically, populate the farthest slots from the CPU per channel first, such as slot 1 in each channel, referencing your server's population guidelines for balanced interleaving.
Q: Does this module support overclocking or XMP profiles?
A: No. This JEDEC-compliant DDR5-6400 RDIMM does not support XMP or overclocking. It operates at standard timings (CL52) to deliver maximum data integrity and uptime for enterprise workloads.
Q: What warranty and typical failure rate can I expect?
A: This module includes a 1-year limited warranty. Enterprise-grade RDIMMs are engineered for 24/7 operation with an extremely low AFR, typically delivering millions of hours MTBF in well-cooled environments.