General

Engineer's Note

Designed for enterprise server platforms, this 64GB DDR4-2133 RDIMM excels in memory-bound workloads such as virtualization, in-memory databases, and large-scale data analytics, where data integrity is non-negotiable. Its quad-rank x4 configuration and registered ECC operation ensure high signal stability across densely populated memory channels while maintaining a low CAS latency of CL15, effectively balancing capacity, reliability, and responsive access for mission-critical environments.

Technical Specs & Insights

1. A 64GB capacity per module drastically increases memory density per server node, enabling seamless consolidation of numerous virtual machines and large in-memory databases without performance trade-offs.
2. ECC protection actively corrects single-bit errors in real time, safeguarding critical enterprise data integrity for transactional systems and continuous analytics pipelines.
3. Registered signal buffering ensures stable, clean communication between the memory controller and DRAM chips, a must-have for maintaining reliability in multi-DIMM server configurations under full load.
4. Quad Rank x4 organization packs the maximum number of DRAM packages into a single RDIMM, allowing fully loaded servers to achieve massive total memory footprints without sacrificing channel efficiency.
5. A 1.2V operating voltage reduces overall power consumption and thermal output in dense rack environments, contributing to lower data center cooling costs over a 24/7 lifecycle.

Why These Specs Matter

In a data center environment, the M386A8K40BM1-CPBQ0 brings critical reliability to workloads where errors are not an option. As a 64GB DDR4-2133 Registered DIMM with ECC and a Quad Rank x4 organization, this module is engineered specifically for server platforms running virtualization clusters or in-memory databases. ECC means single-bit errors caused by cosmic radiation or voltage fluctuations are detected and corrected in real time—preventing silent data corruption that could crash multiple virtual machines simultaneously or produce inaccurate results in financial transactions. The Registered signal type buffers the command and address lines, ensuring clean signal integrity when populating all memory channels with high-capacity DIMMs; this directly translates into platform stability during months of continuous operation. The Quad Rank x4 design maximizes density per slot, so a single server node can host an expansive memory footprint—essential for SAP HANA or Redis clusters where entire datasets must reside in RAM for sub-millisecond response. Operating at a low 1.2V, it also reduces power consumption and thermal load across large fleets, cutting total cost of ownership without compromising performance for bandwidth-sensitive analytics.

Endurance & Reliability

The M386A8K40BM1-CPBQ0 is a 64GB DDR4-2133 Registered ECC RDIMM (Quad Rank) for servers. Below are capacity planning suggestions.

General Virtualization
Populate all memory channels equally for balanced performance. On a dual-socket platform with eight channels per CPU, use sixteen 64GB modules to reach 1TB, providing ample headroom for dozens of VMs without bandwidth bottlenecks.

In-Memory Database
Start by installing one 64GB DIMM per channel to maintain the full 2133 MT/s speed. If additional capacity is required, adding a second module per channel is possible, but the Quad Rank design will force a downgrade to 1866 MHz; accept this trade-off for very large datasets. Strive for identical configurations across sockets to avoid NUMA imbalances.

High-Performance Computing (HPC)
Maximize bandwidth by placing a single 64GB RDIMM in every channel, running at the rated 2133 MHz. In a 16-channel dual-socket system this yields 1TB at peak throughput. Avoid populating two modules per channel, as the resulting speed reduction directly degrades parallel application scalability.

Verified Compatibility

This server RDIMM is rigorously tested, compatible with Dell R730, HPE DL380 Gen9, Lenovo x3650 M5.

FAQ