General

Engineer's Note

Designed for enterprise servers, this 32GB DDR4-2133 Registered DIMM with ECC ensures data integrity and enhanced stability for memory-intensive workloads such as virtualization and in-memory databases. Its Quad Rank x4 organization and CL15 latency offer high-density memory configuration with predictable performance, while the registered signal type maintains signal integrity across fully populated server platforms.

Technical Specs & Insights

1. A 32GB capacity per module enables dense memory configurations, allowing hypervisors to host more virtual machines without sacrificing memory headroom for in-memory databases and enterprise applications.
2. ECC protection silently corrects single-bit errors and detects multi-bit faults, preserving transactional integrity and preventing costly downtime in financial or hosting environments.
3. Registered signal buffering stabilizes command and address lines across high-density server DIMM populations, ensuring reliable operation when every channel is fully populated in rack-scale deployments.
4. Quad Rank x4 organization leverages bank interleaving to keep data pipelines saturated, raising throughput for concurrent analytics queries and heavily virtualized workloads.
5. DDR4-2133 frequency delivers a steady 17 GB/s base bandwidth with low power overhead, ideal for always-on infrastructure where stability trumps peak overclocked speeds.

Why These Specs Matter

The M386A4G40DM0-CPB0 is a 32GB DDR4-2133 Registered ECC memory module purpose-built for enterprise servers, where every design choice directly impacts uptime and workload throughput. Its ECC function silently corrects single-bit errors before they can corrupt a virtual machine’s memory state or introduce a wrong transaction in an in-memory database—eliminating the invisible data poisoning that would otherwise crash a multi-tenant cloud host without warning. The registered buffer stabilizes signal integrity across high-density configurations, letting you fully populate 24 DIMM slots with confidence when running dozens of virtualized containers on a single hypervisor. The quad-rank x4 organization not only doubles addressable capacity per channel but also interleaves ranks to parallelize memory fetches, accelerating the microsecond-critical queries in platforms like Redis or SAP HANA. Operating at an efficient 1.2 volts, the module reduces data center power and cooling overhead, while CL15 timing preserves predictable latency under sustained load. For hyperconverged infrastructure and transactional database servers, this memory means fewer silent failures, stable scalability, and deterministic performance when it matters most.

Endurance & Reliability

The module is a server-class 32GB DDR4-2133 ECC Registered RDIMM. Below are capacity planning recommendations for three key server scenarios.

General Virtualization
Populate each memory channel with a single quad-rank DIMM to achieve 384GB per dual-socket node (12 modules), balancing capacity and full 2133MT/s speed. This configuration comfortably hosts numerous VMs without memory bottlenecks. Add a second module per channel only if consolidation demands surpass 384GB, accepting a speed drop.

In-Memory Database
Maximize capacity by installing two 32GB modules per channel—24 units in a standard dual-socket server—for a 768GB buffer. The lower operating frequency is tolerable because holding the entire dataset in RAM minimizes disk I/O. ECC and high rank count also safeguard data integrity.

High-Performance Computing
Deploy exactly one DIMM per memory channel to sustain peak bandwidth; 12 modules supply 384GB and exploit quad-rank bank interleaving for latency-sensitive HPC kernels. Over-populating channels will throttle frequency and impair throughput in large-scale simulations or data passes.

Verified Compatibility

Validated for server: rigorously tested, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ