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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 128 GB |
| Memory Technology | DDR5 |
| Product Voltage | 1.1 V |
| RAM Speed | 4800 MHz |
| RAM Standard | DDR5-4800/PC5-38400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL40 |
| Rank | Quad Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
Designed for enterprise servers, this 128GB DDR5-4800 RDIMM with ECC and registered signal technology ensures exceptional data integrity and signal stability under heavy loads, making it ideal for memory-intensive workloads such as virtualization, in-memory databases, and large-scale data analytics. Its quad-rank x4 configuration enables high-density memory configurations with reduced electrical loading on the memory bus, while the CL40 CAS latency provides a balanced profile of responsive performance and reliability in multi-DIMM server deployments.
1. 128GB capacity per module allows dense memory configurations that maximize virtual machine counts per server without sacrificing guest performance.
2. ECC protection actively corrects single-bit errors, preserving data integrity for financial databases and mission-critical enterprise applications.
3. Registered signal type stabilizes command and address lines under heavy loads, ensuring reliable operation when all DIMM slots are populated in a multi-socket platform.
4. Quad Rank x4 organization interleaves multiple internal bank groups to sustain high throughput, helping in-memory analytics queries complete faster.
5. DDR5-4800 speed delivers substantial bandwidth headroom that accelerates concurrent data streams in content delivery nodes and large-scale inference servers.
When you deploy a dense virtualization cluster or run an in‑memory database like SAP HANA, the M321RAGA0B20‑CWKZH RDIMM isn’t just another component—it’s the foundation that keeps your services consistent and your data accurate. The 128 GB capacity means you can pack more VMs into a single host without immediately hitting a capacity wall, reducing hardware sprawl and licensing costs. Behind that scale, the registered architecture and quad‑rank design buffer command signals and interleave access across ranks, letting you populate all channels at full speed without overloading the memory controller—critical when a host supports dozens of DIMMs. While the modules are busy feeding hundreds of virtual machines, the integrated ECC continuously corrects single‑bit errors caused by background radiation or electrical noise; for a financial database processing millions of transactions, one silent bit flip could mean a corrupted record or a crashed instance, so ECC directly protects revenue. DDR5‑4800 bandwidth then ensures that even under heavy simultaneous query loads, latency stays within acceptable bounds, keeping real‑time analytics responsive. Every one of these features translates directly into fewer outages, higher consolidation ratios, and stronger data trust for your enterprise workloads.
General Virtualization
This 128GB DDR5-4800 RDIMM is purpose-built for dense virtualization hosts. Deploy a balanced population of one DIMM per channel (1 DPC) across all memory channels—typically eight identical modules in a dual-socket server—to maximize bandwidth while leaving room for future expansion. This configuration easily supports 200+ moderate VMs, keeping guest memory fully reserved without swapping.
In-Memory Database
In-memory databases like SAP HANA or Redis demand both large capacity and uncompromising data integrity. Populate all channels with these 128GB Quad Rank x4 ECC RDIMMs at 1 DPC to achieve terabyte-scale footprints with the lowest latency profile. Strictly avoid mixing ranks or speeds; uniform quad-rank modules per channel maintain stable signal timing and prevent throttling under sustained 100% load.
High-Performance Computing (HPC)
For memory-bandwidth-bound HPC workloads, capacity must be balanced against peak throughput. Equip each CPU’s memory channels symmetrically with one 128GB RDIMM per channel, delivering the full eight-channel DDR5 width. Quad-rank modules at 1 DPC offer an optimal sweet spot: maximum per-socket bandwidth near 307 GB/s and sufficient headroom for large simulation datasets, without the clock-speed penalty of 2 DPC configurations.
Rigorously tested, guaranteed compatible with Dell PowerEdge R760, HPE DL380 Gen11, Lenovo SR650 V3, and more.
Q: Can I mix this M321RAGA0B20-CWKZH with other memory modules of different brands or speeds?
A: Mixing RDIMMs of different brands or speeds is strongly discouraged. It may cause signal integrity issues, preventing the system from POSTing or forcing all modules to the lowest common speed.
Q: Is this memory compatible with my system? Does it support Intel Xeon or AMD EPYC servers?
A: This DDR5-4800 ECC Registered DIMM is designed for server platforms supporting the standard, such as 4th Gen Intel Xeon Scalable and AMD EPYC 9004 series. Please consult your motherboard’s qualified vendor list for exact support.
Q: What is the recommended DIMM population order for optimal performance?
A: For optimal performance, populate identical DIMMs per channel starting with the furthest slot from the CPU. Typically, populate slots A1, B1, C1, D1 first to balance memory across all memory controllers.
Q: Does this module support overclocking or XMP profiles?
A: No. As a JEDEC-compliant server RDIMM, this module operates at fixed standard timings with ECC. It does not support overclocking or XMP, ensuring maximum stability in 24/7 mission-critical environments.
Q: What warranty and typical failure rate can I expect?
A: This product includes a one-year warranty. Server-grade RDIMMs have a very low annualized failure rate, typically under 0.5%, due to rigorous screening and ECC error correction.