General

Engineer's Note

Designed for enterprise servers and heavy virtualization workloads, this 64GB DDR4-3200 RDIMM with ECC ensures data integrity for mission-critical applications such as in-memory databases and large-scale virtualized environments. Its Registered signal type paired with quad-rank x4 organization maximizes capacity density and electrical stability on high-density server boards while maintaining reliable 3200MT/s throughput at a standard 1.2V.

Technical Specs & Insights

1. 64GB capacity per module condenses large in-memory datasets onto fewer sticks, maximizing virtualization host density without sacrificing DIMM slot availability.
2. ECC protection detects and corrects single-bit errors in real time, preserving data integrity across long-running analytics and transactional database workloads.
3. Registered clock drivers stabilize command and address signals across fully loaded server boards, preventing signal degradation during sustained 24/7 operation.
4. Quad Rank x4 organization keeps memory channels efficiently saturated, delivering consistent bandwidth for parallel virtual machine and container execution.
5. 3200MT/s transfer rate reduces latency in data-heavy operations, accelerating processing cycles for in-memory caching and real-time decision systems.

Why These Specs Matter

Designed for the data center, the M386A8K40DM2-CWELQ is a 64GB DDR4-3200 Registered DIMM engineered for mission-critical server workloads. Its four defining attributes translate directly into real-world reliability and performance. The 64GB high-density capacity enables you to populate fewer slots while still achieving terabyte-scale memory in virtualization clusters, lowering licensing costs and power consumption without sacrificing VM density. Integrated ECC continuously corrects single-bit errors, preventing silent data corruption that can crash hypervisors or poison database transactions—a non-negotiable safeguard for financial systems and in-memory analytics platforms like SAP HANA. The register buffer stabilizes signal integrity across multiple DIMMs per channel, ensuring 24/7 uptime even when all slots are fully populated. Finally, the Quad Rank x4 configuration leverages rank interleaving to boost effective bandwidth, dramatically accelerating concurrent data access in heavily virtualized environments and large memory databases. For IT architects, this means you can confidently consolidate more virtual machines with absolute data integrity while eliminating memory bottlenecks, making this module the foundation of a resilient, high-throughput infrastructure.

Endurance & Reliability

General Virtualization
For dense virtualization hosts running hypervisors like VMware ESXi or KVM, this 64GB RDIMM is an ideal building block. Populate servers in balanced configurations (e.g., 8 or 16 modules) across all memory channels to maximize bandwidth while leaving room for growth, targeting 256GB to 1TB total capacity per host for moderate consolidation ratios.

In-Memory Database
Memory-centric workloads such as SAP HANA or Redis demand large, contiguous capacity and rock-solid data integrity, which ECC and registered buffering directly provide. Deploy these quad-rank 64GB modules to reach 1TB or more per server with fewer DIMM slots, but be mindful of the slight speed reduction at high rank counts and prioritize 2-socket systems to maintain linear memory interleaving.

High-Performance Computing (HPC)
In HPC clusters where memory bandwidth often caps floating-point throughput, populate all memory channels per CPU (typically 8 channels) with one DIMM per channel for peak GB/s. Use these 3200MT/s RDIMMs in dual-socket nodes with 8 modules each — delivering 512GB total — to keep frequency at rated speeds while avoiding performance penalties from mixing quad-rank DIMMs on the same channel.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V3.

FAQ