General

Engineer's Note

This is a server-class DDR4-3200 Registered DIMM with ECC, purpose-built for enterprise platforms requiring high data integrity and stability, such as virtualization hosts and in-memory databases. Its dual-rank x4 organization and CL22 latency deliver a balance of capacity and signal integrity in multi-DIMM configurations, while the registered interface ensures reliable operation under heavy memory loads.

Technical Specs & Insights

1. ECC protection silently corrects single-bit memory errors, safeguarding transactional databases and financial workloads from silent data corruption in always-on enterprise environments.
2. Registered signal buffering stabilizes the command and address buses, enabling dense server configurations to scale memory capacity without compromising signal integrity under heavy virtualization loads.
3. High-capacity module maximizes memory per channel, allowing cloud hosts to accommodate more virtual machines and in-memory datasets without expanding physical footprint.
4. DDR4-3200 transfer rate elevates per-channel bandwidth, accelerating real-time analytics and AI inference pipelines where rapid data access defines service-level outcomes.
5. Dual Rank x4 organization interleaves bank groups for sustained channel saturation, delivering predictable throughput to multi-core processors during peak consolidation workloads.

Why These Specs Matter

The M393A8G40BB4-CWEGY 64GB DDR4-3200 RDIMM is engineered for modern data centers. Its four crucial attributes—ECC, registered clocking, dual-rank x4 design, and 3200MT/s with CL22—solve real-world challenges in virtualization clusters and in-memory databases. ECC corrects single-bit errors, essential for Redis or SAP HANA where a bit flip could corrupt transactions. Registered buffering keeps the command bus clean, allowing fully loaded servers with terabytes of memory for hundreds of VMs without signal decay. Dual-rank interleaving boosts bandwidth; under heavy VM consolidation, the memory controller alternates ranks to hide refresh gaps, preventing noisy neighbor slowdowns. Meanwhile, the 3200MT/s transfer rate and CL22 latency deliver consistent throughput for real-time analytics, and the 1.2V operation lowers your power and cooling overhead in dense server racks.

Endurance & Reliability

General Virtualization
This 64GB DDR4-3200 RDIMM module is ideal for dense virtualization hosts. For a typical dual-socket server running 30–50 light to medium VMs, start with four identical modules per CPU (8 total) to populate balanced memory channels while leaving room to scale. The ECC and registered signaling ensure data integrity under sustained multi-tenant workloads, and the dual-rank x4 configuration provides optimal bandwidth for hypervisor-level memory overcommit.

In-Memory Database
In-memory databases like Redis or SAP HANA demand both capacity and fault tolerance. Deploy six to eight of these 64GB RDIMMs per socket to reach 384–512GB, matching the 1 DIMM per channel (1DPC) sweet spot for 3200MT/s speed without throttling. The low 1.2V CL22 profile helps control thermals in dense 24/7 nodes, while ECC becomes non-negotiable for protecting in-flight transactional data against single-bit errors.

High-Performance Computing
For HPC clusters running MPI workloads or simulation codes, prioritize memory bandwidth per core. Populate all eight channels of a modern server platform with identical 64GB RDIMMs (one per channel) to achieve peak theoretical throughput while delivering 512GB per node. The dual-rank design maximizes bank-level parallelism, and the registered buffer stabilizes signal integrity at full population—critical for jobs that scale across hundreds of nodes and run for days.

Verified Compatibility

Rigorously tested, compatible with Dell R750, HPE DL380 Gen10 Plus, Lenovo SR650 V2, and Supermicro X12 servers.

FAQ