General

Engineer's Note

This is a server-grade DDR4-3200 Registered ECC DIMM, purpose-built for enterprise platforms handling virtualization, in-memory databases, and latency-sensitive workloads where data integrity is non-negotiable. Its quad-rank x4 organization enables very high 64 GB capacity per module while Registered signaling ensures stable multi-DIMM operation, and ECC with a CAS latency of 22 delivers reliable throughput in dense, mission-critical deployments.

Technical Specs & Insights

1. ECC memory proactively detects and corrects single-bit errors, preserving data integrity for mission-critical enterprise applications and preventing silent data corruption in long-running server workloads.
2. Registered signal type buffers command and address signals, enabling the use of high-capacity 64GB modules while maintaining rock-solid electrical stability across fully populated server memory channels.
3. Quad Rank x4 organization packs four independent ranks on a single module, maximizing memory density per slot to support massive virtualization environments without sacrificing bandwidth.
4. The 64GB capacity per module allows dense server configurations to reach terabytes of total memory, dramatically increasing VM density and in-memory database performance for large-scale consolidation projects.
5. DDR4-3200 speed delivers 25.6 GB/s of peak bandwidth per channel, accelerating analytics and real-time processing by ensuring fast data retrieval across multiple simultaneous server threads.

Why These Specs Matter

The M386A8K40DM2-CWEZY is a 64GB DDR4-3200 RDIMM built strictly for server infrastructure, and every specification speaks to the demands of modern data centers. Its ECC error correction silently detects and corrects single-bit memory faults, which is non-negotiable when a flipped bit in a virtualized cluster can crash dozens of tenant VMs or silently poison a financial transaction log. The registered interface buffers command and address signals, preserving signal integrity across fully loaded memory channels so your hypervisor can confidently scale to terabyte-class pools without random instability. The quad-rank x4 organization enables rank interleaving, effectively boosting bandwidth by up to 20 percent for in-memory databases like SAP HANA or high-speed Redis caching where microsecond latency directly impacts user experience. Meanwhile, the 1.2V power envelope reduces thermal output in dense racks, driving down both energy costs and cooling complexity. From a VMware farm hosting 100-plus guests to a real-time analytics engine processing millions of records, this module means always-on data accuracy, scalable capacity, and energy-smart performance that keeps mission-critical services running without compromise.

Endurance & Reliability

General Virtualization
For a virtualized environment running multiple VMs, dense memory capacity is critical. A single 64GB RDIMM allows you to configure a dual-socket server with one DIMM per channel (1DPC), populating all 8 channels per CPU for 512GB total, which delivers balanced capacity and memory bandwidth ideal for moderate consolidation ratios. For heavier workloads, using two of these quad-rank modules per channel maximizes capacity to 1TB per socket while keeping the registered ECC protection essential for host stability.

In-Memory Database
In-memory databases such as SAP HANA or Redis demand both large capacity and extreme data integrity. Deploying twelve 64GB quad-rank RDIMMs per CPU (achieving 768GB in a single socket) creates a robust configuration for real-time analytics. The 3200MT/s speed and CL22 latency provide responsive access, while the ECC and registered signaling safeguard against in-memory bit errors that could corrupt transactional data, making this module a perfect fit for mission-critical caching and database layers.

High-Performance Computing
HPC clusters often prioritize memory bandwidth to feed many cores. Populating all eight memory channels of a modern server CPU with one 64GB RDIMM per channel yields an 8-DIMM configuration that balances the 512GB capacity against peak theoretical bandwidth, beneficial for computational fluid dynamics or molecular modeling. For capacity-optimized nodes, moving to a two-DIMM-per-channel layout (16 modules per socket for 1TB) still maintains registered ECC resilience under the sustained heavy loads typical in large-scale simulations.

Verified Compatibility

Rigorously tested and compatible with servers like Dell PowerEdge R750, HPE ProLiant DL380 Gen10 Plus, Lenovo ThinkSystem SR650 V2.

FAQ