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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 256 GB |
| Memory Technology | DDR5 |
| Product Voltage | 1.1V |
| RAM Speed | 4800MHz |
| RAM Standard | DDR5-4800/PC5-38400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL4 |
| Rank | Octal Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
Designed for enterprise-class servers, this 256GB DDR5-4800 Registered ECC module delivers exceptional data integrity and stability for memory-intensive workloads such as large-scale virtualization and in-memory databases. Its octal rank x4 configuration maximizes capacity density per channel while the low CAS latency of CL4 and registered signal architecture ensure reliable, high-bandwidth operation under heavy concurrent access.
1. A single 256GB module capacity compacts massive in-memory datasets into fewer DIMM slots, directly raising virtual machine density per server without sacrificing upgrade headroom.
2. ECC error correction continually detects and repairs single-bit memory faults, preserving transactional integrity for financial processing and long-running scientific simulations.
3. Registered signal buffering isolates the command and address bus from heavy load, making it possible to populate all memory channels fully while sustaining rock-solid signal stability under 24/7 uptime.
4. Octal Rank x4 organization stacks eight independent ranks on one RDIMM, satisfying extreme memory footprints in hyperconverged clusters where terabytes of resilient capacity are non-negotiable.
5. 4800MT/s transfer rate feeds each CPU core a higher throughput pipeline, slashing latency in virtualized database queries and real-time analytics workloads.
The M321RBGA0B40-CWKZH is unmistakably a server-grade RDIMM, and its four defining characteristics directly address the most critical pain points in enterprise data centers. First, the 256GB capacity on a single module eliminates the need to populate excessive DIMM slots, preserving precious board real estate for dense virtualization clusters where hosting hundreds of VMs per node demands maximum memory headroom. Second, ECC error correction is non-negotiable for data integrity. In an in-memory database like SAP HANA processing financial transactions, even a single undetected bit flip can cause silent data corruption and catastrophic decision-making failures; this module’s ECC actively prevents that. Third, the Registered signal architecture buffers the command and address buses, ensuring rock-solid electrical stability when you deploy 16 or more such high-capacity sticks per server—meaning the memory controller isn’t overwhelmed, and your hypervisor remains stable under full load. Finally, the DDR5-4800 speed paired with Octal Rank x4 design delivers enormous parallel bandwidth. For a real-time analytics engine batch-processing terabytes of data, this translates to drastically faster data throughput and lower query latency, keeping your insights timely rather than bottlenecked.
General Virtualization
Deploy these 256GB DDR5 registered RDIMMs to maximize VM density per host. Populate all memory channels symmetrically—one DIMM per channel in balanced configurations—to preserve full 4800MT/s throughput and avoid NUMA penalties. Plan for a minimum of 8 modules (2TB) on a typical dual-socket server to comfortably run dozens of mixed workloads.
In-Memory Database
Achieve terabyte-scale footprints by fully loading all available DIMM slots with these high-capacity Octal Rank x4 modules. Although rank count slightly impacts command rates, the ECC and registered design guarantee data integrity for mission-critical in-memory stores. Distribute modules evenly across memory controllers to prevent latency imbalance between sockets.
High-Performance Computing
Combine these 256GB RDIMMs with the CPU’s maximum memory channels to deliver both large capacity and strong aggregate bandwidth. Use one DIMM per channel configuration to maintain 4800MHz speeds, which is crucial for bandwidth-sensitive HPC codes. For memory-bound simulations, scaling to a fully populated system with 4-8 such modules per node provides a deep, high-performance working set without resorting to slower storage tiers.
Rigorously tested server DDR5 RDIMM, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3, and Supermicro.
Q: Can I mix this M321RBGA0B40-CWKZH with other memory modules of different brands or speeds?
A: Mixing this Registered ECC RDIMM with modules of different brands, speeds, or ranks is not recommended. It may cause unstable operation, memory errors, or prevent the server from POSTing.
Q: Is this memory compatible with my system?
A: This DDR5-4800 Registered ECC DIMM is designed for servers using Intel Xeon Scalable 4th Gen or AMD EPYC 9004 series platforms. Please verify your server model's qualified vendor list for full compatibility assurance.
Q: What is the recommended DIMM population order for optimal performance?
A: For optimal performance, populate identical x4 Octal Rank DIMMs according to your server platform's memory population guidelines, typically filling 1 DIMM per channel first, then balance across CPU memory controllers.
Q: Does this module support overclocking or XMP profiles?
A: No. As a server-grade Registered ECC module, it adheres to JEDEC DDR5-4800 standards and does not support overclocking or XMP. Server memory prioritizes data integrity and stability over speed.
Q: What warranty and typical failure rate can I expect?
A: This module includes a one-year warranty. Server ECC DIMMs generally exhibit very low failure rates due to rigorous testing and error correction, with an expected AFR well under 1% under normal operating conditions.