General

Engineer's Note

This 64GB DDR4-2933 RDIMM with ECC and registered signaling is engineered for server platforms handling mission-critical workloads such as virtualization, large-scale in-memory databases, and data analytics where data corruption cannot be tolerated. Its quad-rank x4 configuration maximizes memory capacity per channel while the registered buffer reduces electrical loading on the memory controller, and the integrated ECC engine corrects single-bit errors in real time to ensure stable, error-free operation at CL21 latency.

Technical Specs & Insights

1. Per-module capacity leaps to accommodate sprawling virtual machine fleets and in-memory data stores, slashing the need for extra server nodes in private cloud deployments.
2. End-to-end ECC corrects memory faults in real time, ensuring data integrity for financial ledgers and patient records where accuracy is non-negotiable.
3. Registered DIMM technology re-drives commands to preserve signal quality across fully populated server boards, delivering rock-solid stability during prolonged 24/7 operations.
4. High transfer speed feeds multi-core server CPUs with minimal delay, accelerating complex queries and containerized microservices under bursty workloads.
5. Quad rank x4 interleaving keeps memory channels saturated, optimizing simultaneous access for heavy consolidation ratios and hypervisor performance.

Why These Specs Matter

Designed for enterprise servers, the M386A8K40DM2-CVFBY DDR4 RDIMM combines four pivotal features that directly impact your data center’s reliability and performance. First, Error-Correcting Code (ECC) actively detects and corrects single-bit memory errors—silent bit-flips that can corrupt financial transactions or bring down virtual machines. Second, its Registered buffer stabilizes signal integrity, letting you fully populate all memory channels without compromising speed; this is essential for consolidating dozens of VMs per host. Third, the 64GB capacity built on a Quad Rank x4 architecture delivers massive density and enables interleaving that accelerates in-memory databases like SAP HANA or Redis by reducing latency. Finally, operating at 2933 MT/s at a low 1.2V, it provides high bandwidth with excellent power efficiency, lowering your TCO in dense clusters. In virtualization clusters and data-crunching scenarios, this module means fewer crashes, higher VM density, and faster real-time analytics.

Endurance & Reliability

Capacity Planning Guide for DDR4-2933 ECC RDIMM (64GB Module)

This memory module is a registered ECC DIMM designed for servers. It operates at 1.2V with a CAS latency of 21 and a quad-rank x4 organization, offering high capacity and data integrity. Below are configuration recommendations for typical server workloads.

General Virtualization
When consolidating multiple virtual machines, populate at least six to eight identical 64GB RDIMMs across all memory channels to maximize bandwidth. For a dual-socket server, a balanced configuration of 512GB (eight modules per CPU) comfortably supports over 50 general-purpose VMs. Always match DIMM population across memory controllers to maintain uniform latency and avoid NUMA penalties.

In-Memory Database
Databases like Redis or SAP HANA demand large, reliable memory pools. Install a minimum of 512GB using eight 64GB modules per socket, and scale to 1TB or more for production datasets. Enable memory mirroring or sparing only if availability requirements outweigh capacity needs, as these features reduce usable capacity. Place all modules in identical configurations to guarantee the predictable latency ECC corrects single-bit errors on the fly.

High-Performance Computing (HPC)
HPC clusters benefit from a balanced ratio of memory bandwidth to core count. Populate all eight channels per CPU with one 64GB RDIMM each (512GB total), delivering peak bandwidth for simulation and modeling codes. Avoid mixing quad-rank modules on the same channel to maintain 2933MT/s speed; if more capacity is needed, upgrade to 128GB modules rather than adding a second DIMM per channel. Monitor job memory footprints and scale node memory uniformly to prevent bottlenecks in tightly coupled parallel tasks.

Verified Compatibility

Rigorously tested server memory: compatible with Dell PowerEdge R740, R640, HPE DL380 Gen10, Lenovo SR650.

FAQ