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| Product Type | Memory Module |
|---|---|
| Compliance Standards | |
| Memory Capacity | 16 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2 V |
| RAM Speed | 2933 MHz |
| RAM Standard | DDR4-2933/PC4-23400 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL21 |
| Rank | Single Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
This 16GB DDR4-2933 registered ECC RDIMM (PC4-23400, CL21) is engineered for server platforms, delivering robust data integrity and reliability for virtualization, in-memory databases, and enterprise workloads where error correction is critical. Its single-rank x4 design with registered buffering ensures superior signal stability at higher densities, enabling wider memory population without sacrificing access speed.
1. ECC error correction silently repairs single-bit faults in real time, preventing silent data corruption during continuous financial processing and database operations.
2. Registered signal buffering isolates the memory command bus, enabling fully populated server motherboards to maintain rock‑stable operation without signal degradation.
3. The 2933 MT/s data rate supplies the sustained throughput required to feed multi‑core server CPUs, keeping virtualized workloads and in‑memory analytics free from memory‑starvation bottlenecks.
4. A 16GB module capacity delivers the optimal density for hosting numerous containerized services per node, balancing consolidation ratios with room for future DIMM expansion.
5. Single Rank x4 organization uses narrow‑channel DRAMs to confine physical failures to a single device, strengthening resilience against multi‑bit errors and maximizing uptime in critical infrastructure.
When deploying a dense virtualization cluster or an in-memory database like SAP HANA, the M393A2K40DB2-CVFBY becomes far more than a memory module — it becomes your frontline defense against silent data corruption and crippling latency. Its Registered DIMM architecture, paired with integrated ECC, allows you to fully populate all 24 DIMM slots in a dual-socket server without signal degradation, meaning you can scale terabyte-class memory pools for dozens of virtual machines without risking stability. The ECC engine corrects single-bit errors in real time, a non-negotiable protection when processing financial transaction logs or electronic patient records that must remain flawless. For latency-sensitive Redis or Memcached clusters, the Single Rank x4 organization and DDR4-2933 speed work together to deliver fast, predictable access to massive datasets, directly improving query throughput and user experience. Meanwhile, the 1.2V operating voltage lowers power draw per module, which cumulatively reduces your data center cooling burden and operating expenses. This server memory is engineered to keep your always-on business services genuinely always on.
General Virtualization
For general virtualization hosts, balance capacity and cost by installing six to eight of these 16GB RDIMMs per CPU socket to populate at least three memory channels. This yields 96–128GB per socket, providing ample headroom for moderate VM density while maintaining the 2933 MT/s speed. Avoid populating only one DIMM per channel, as that wastes the registered ECC platform’s bandwidth potential.
In-Memory Database
In-memory databases like Redis or SAP HANA demand large, contiguous memory spaces with the lowest possible latency. Deploy a fully balanced configuration—typically 12 identical 16GB RDIMMs per dual-socket server, one per channel—to reach 192GB while preserving symmetrical memory access. If capacities exceed 192GB, move to 32GB or 64GB RDIMMs rather than mixing sizes, because uniform rank and timing across channels prevents performance anomalies.
High-Performance Computing
HPC clusters require maximum bandwidth, so populate all eight memory channels of a modern server platform with one 16GB RDIMM each for a total of 128GB per node. The single-rank x4 organization at 2933 MT/s helps reduce rank-switching penalties in memory-bound simulations and fluid dynamics workloads. For compute nodes that scale out, this density keeps the per-core memory ratio lean, and identical module part numbers across nodes guarantee consistency in MPI job placement.
This server memory is rigorously tested, compatible with Dell PowerEdge R740, R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.
Q: Can I mix this M393A2K40DB2-CVFBY with other memory modules of different brands or speeds?
A: Mixing different brands or speeds is not recommended for this ECC Registered DIMM. Mismatched modules can cause instability, signal integrity issues, or even prevent boot. Always use identical part numbers for validated server performance.
Q: Is this memory compatible with my Intel Xeon or AMD EPYC server platform?
A: This DDR4-2933 ECC RDIMM is compatible with servers using Intel Xeon Scalable or AMD EPYC processors that support 288-pin Registered DDR4 at 2933MT/s. Please consult your motherboard QVL for confirmation.
Q: What is the recommended DIMM population order for optimal performance?
A: To maximize memory bandwidth, populate one DIMM per channel first (e.g., slots A1, B1, C1, etc.), then fill additional slots symmetrically. Follow your server manual’s balanced configuration for interleaving.
Q: Does this module support overclocking or XMP profiles?
A: No. As a JEDEC-standard ECC Registered DIMM for enterprise servers, it does not support XMP or overclocking. It operates solely at its rated speed of DDR4-2933 with CL21 timing for maximum stability.
Q: What warranty and typical failure rate can I expect?
A: This module comes with a one-year warranty. Enterprise-grade RDIMMs exhibit extremely low failure rates under normal operating conditions, thanks to rigorous testing, thermal management, and error correction capabilities.