General

Engineer's Note

Optimized for server platforms, this DDR4-3200 RDIMM with ECC and a 1.2V operating voltage ensures data integrity in memory-intensive workloads such as virtualization and in-memory databases. Its registered signal type combined with a single-rank x4 organization reduces the electrical load on the memory controller, enabling stable operation at 3200 MT/s in dense, multi-DIMM configurations.

Technical Specs & Insights

1. ECC protection silently corrects single-bit memory errors, safeguarding financial transactions and in-memory databases against data corruption in 24/7 operation.
2. Registered clock-driver buffers stabilize signal integrity, enabling large-capacity memory populations essential for dense virtualization and scale-up workloads.
3. 16GB per module strikes an ideal density for cost-effective server node scaling, allowing flexible memory provisioning for containerized microservices and mid-tier application servers.
4. 3200MT/s data rate elevates memory bandwidth, accelerating real-time analytics and reducing query latency in high-throughput database clusters.
5. Single Rank x4 organization minimizes inter-rank timing conflicts, delivering consistent low-latency access for latency-sensitive workloads like high-frequency trading simulations.

Why These Specs Matter

The M393A2K40EB3-CWEGY is a server-grade DDR4-3200 Registered DIMM, and its design directly answers the pain points of data centers and enterprise IT. The first critical feature is ECC error correction: in a 24/7 virtualized cluster hosting dozens of VMs, a single bit-flip caused by background radiation can silently corrupt financial transactions or database entries. ECC detects and corrects these errors in real time, turning an invisible risk into verified data integrity. Second, the registered signal buffer allows a server motherboard to support far higher memory densities without signal degradation. When you are scaling a memory-hungry in-memory database like SAP HANA, that buffering means you can fully populate all channels and still expect stable boot and operation, even under heavy thermal load.

The third characteristic is the 3200 MT/s speed at a standard 1.2 V. This balanced voltage lowers power draw per DIMM across a fleet of hundreds of servers, which directly reduces cooling costs and improves long-term reliability in dense rack environments. Finally, the single-rank x4 organization and CL22 latency are tuned for predictable bandwidth in mixed-workload scenarios. In an OLTP database engine, for instance, the single rank avoids the rank-to-rank turnaround penalty that would stall data bursts, giving you consistently low latency for millions of small concurrent queries. This module does not just meet a specification sheet—it prevents revenue-impacting outages, delivers headroom for virtualization density, and keeps operating expenses in check, which is exactly what an IT infrastructure owner needs from memory.

Endurance & Reliability

General Virtualization
For a balanced hypervisor host, populate six to eight of these 16GB RDIMMs across dual-socket memory channels to achieve 96–128 GB total capacity. This configuration supports 20–30 moderate VMs while maintaining 1 DIMM per channel (1DPC) for optimal 3200 MT/s speed. Leave half the slots open for future scaling.

In-Memory Database
Maximize capacity with all 16 or more DIMM slots filled, delivering 256 GB or higher to hold entire datasets in RAM. Use identical single-rank x4 modules to reduce latency and take full advantage of registered ECC reliability. Plan for 2 DIMMs per channel (2DPC) if the platform allows, accepting a slight speed drop for density.

High-Performance Computing
Equip each node with a symmetrical set of 8 or 16 modules, ensuring uniform memory population across all CPU sockets for peak bandwidth. The combination of DDR4-3200, single-rank x4, and CL22 delivers high throughput with predictable low latency. Scale per-node capacity to 128–256 GB so that memory bandwidth keeps compute cores saturated without swapping.

Verified Compatibility

Validated for Dell PowerEdge R750, HPE ProLiant DL380 Gen10 Plus, Lenovo ThinkSystem SR650 V2 servers—rigorously tested.

FAQ