General

Engineer's Note

This DDR4-2666 Registered ECC memory module is designed for server platforms, making it ideal for virtualization, in-memory databases, and other mission-critical workloads that demand unwavering data integrity. Its quad-rank x4 organization enables high-density 64GB capacity while registered signaling strengthens command/address stability, and integrated ECC actively corrects single-bit errors to safeguard long-duration operations.

Technical Specs & Insights

1. 64 GB capacity per module allows dense server deployments to host significantly more virtual machines and in-memory databases on a single node, directly boosting consolidation ratios.
2. ECC error correction actively detects and fixes single-bit memory faults, preserving data integrity for mission-critical workloads like financial ledgers or hypervisor operations.
3. Registered signal buffering stabilizes command and address lines when populating numerous DIMMs, enabling large-scale memory configurations without signal degradation.
4. Quad Rank x4 organization interleaves multiple rank accesses to fully saturate the memory bus, sustaining high bandwidth under simultaneous VM and container traffic.
5. DDR4-2666 transfer rate supplies generous throughput for analytics and content delivery servers, keeping response times low even during peak concurrent requests.

Why These Specs Matter

The M386A8K40BM2-CTD6Q is a 64GB DDR4-2666 registered DIMM engineered for critical server workloads. Its ECC, registered buffer, Quad Rank x4 design, and high density tackle key pain points. ECC silently corrects single-bit errors—without it, a flipped bit could corrupt financial data or crash a hypervisor, causing unacceptable downtime. The registered buffer ensures clean signals even with fully populated 24-slot servers, vital for dense virtualization. Quad Rank interleaving hides latency, boosting throughput for in-memory databases like Redis or SAP HANA under heavy concurrent queries. The 64GB capacity lets you keep large datasets in DRAM, eliminating the performance penalty of swapping during peak transaction loads. Together, these features deliver the integrity, scalability, and consistent low latency that enterprise data centers demand.

Endurance & Reliability

General Virtualization
For general virtualization, the 64GB DDR4-2666 Registered ECC DIMM is a core building block for high VM density. Populate every memory channel in a dual-socket server to easily reach 512 GB or more, while ECC ensures data integrity across multi-tenant workloads. This balanced capacity approach minimizes resource contention and supports smooth live migration.

In-Memory Database
In-memory databases demand extreme capacity and fault tolerance. The Quad Rank x4 design of this RDIMM maximizes capacity per channel, allowing servers to scale to 1 TB or beyond for holding entire datasets in RAM. Populate two DIMMs per channel where supported, leveraging ECC to protect critical in-memory structures from bit errors.

High-Performance Computing
HPC clusters benefit from both ample capacity and sustained bandwidth. Equipping one 64 GB RDIMM in each of the server’s memory channels delivers 384–768 GB of fast memory, enabling large simulations to run without disk I/O bottlenecks. When populating two modules per channel, plan for slight speed trade-offs that are typically offset by the massive capacity gain.

Verified Compatibility

Rigorously tested server memory, validated for Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and Supermicro SYS-620P-TR.

FAQ