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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 256 GB |
| Memory Technology | DDR5 |
| Product Voltage | 1.1 V |
| RAM Speed | 6400 MHz |
| RAM Standard | DDR5-6400/PC5-51200 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL40 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | DIMM |
This is a high-capacity 256GB DDR5-6400 registered DIMM with ECC, purpose-built for enterprise servers running memory-intensive workloads such as virtualization and in-memory databases, where data integrity is paramount. Its quad-rank x4 configuration and registered signal topology ensure robust signal integrity at high speeds, while the CL40 latency at 1.1V delivers a balance of performance and power efficiency in dense multi-DIMM deployments.
1. ECC protection continuously detects and corrects memory errors, preventing silent data corruption in mission-critical database and financial transaction servers.
2. Registered signal buffering stabilizes command and address integrity across densely populated memory channels, essential for large-scale virtualization hosts.
3. 256GB capacity per module enables massive in-memory datasets and high VM density per server node without sacrificing performance to disk swapping.
4. DDR5-6400 bandwidth fuels real-time analytics and AI inference pipelines, keeping multiple CPU cores fed with minimal latency under parallel workloads.
5. Quad Rank x4 organization maximizes channel interleaving and utilization, delivering predictable throughput even under extreme memory consolidation pressure.
The M321RBJA0M22-CLPYL is a 256GB DDR5-6400 Registered DIMM designed for demanding data-center workloads. In virtualized clusters and in-memory databases, its ECC support means silent bit errors cannot slip through—every bit is actively validated, safeguarding transactions in VMware or Redis where integrity is critical. The registered buffer re-drives signals, eliminating degradation in fully-populated servers and letting you max out DIMM slots without stability fears when hosting hundreds of VMs. Its quad-rank x4 design delivers 256GB in one stick, maximizing density and leaving room for growth. Paired with 6400MT/s bandwidth, it feeds memory-hungry analytics databases with low-latency throughput, preventing CPU stalls during fast data retrieval. Finally, operating at just 1.1V, this module trims power and cooling costs across a fleet while maintaining balanced CL40 performance.
This module is server memory: a 256GB DDR5-6400 registered ECC DIMM with quad-rank x4 organization.
General Virtualization
Populate one module per memory channel to balance bandwidth and capacity. For a dual-socket server with 16 channels, this yields 4TB, comfortably running hundreds of VMs. Overcommitted deployments can double capacity to 8TB by using two modules per channel, though speed may drop to 4800MT/s.
In-Memory Database
Maximize capacity by filling all channels with one 256GB RDIMM each; this retains full 6400MT/s speed. A 24-slot platform delivers 6TB, ideal for large in-memory databases like Redis or SAP HANA. Use memory mirroring or rank sparing for high availability.
High Performance Computing
For bandwidth-critical HPC workloads, install identical DIMMs across all memory channels—usually 8 per socket for 2TB. This symmetric configuration guarantees peak DDR5-6400 throughput essential for simulation and modeling. Choose 1DPC or 2DPC based on required capacity per core.
Always consult your server platform’s population guidelines for best performance.
Strictly tested for server compatibility: validated for Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.
Q: Can I mix this M321RBJA0M22-CLPYL with other memory modules of different brands or speeds?
A: Mixing is not recommended. Registered ECC modules require identical part numbers, ranks, and timings to ensure signal integrity and system stability. Mixed configurations often cause POST failures or unpredictable errors.
Q: Is this memory compatible with my system?
A: This DDR5-6400 Registered ECC DIMM is designed for server platforms supporting DDR5 RDIMMs, such as Intel Xeon Scalable (Sapphire Rapids) or AMD EPYC 9004/9005 series. Verify your motherboard’s qualified vendor list.
Q: What is the recommended DIMM population order for optimal performance?
A: Follow your server motherboard manual. Typically, populate the farthest slot per channel first. For this quad-rank module, balanced loading across all memory channels maximizes throughput and minimizes latency.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a server-grade Registered ECC module operating at JEDEC standard DDR5-6400. It does not support XMP or manual overclocking, as mission-critical reliability demands strictly validated speeds and timings.
Q: What warranty and typical failure rate can I expect?
A: It comes with a one-year warranty. These enterprise modules exhibit a very low annualized failure rate (typically below 0.5%), ensuring durable, long-term reliability in 24/7 data center environments.