General

Engineer's Note

Designed for enterprise servers, this 32 GB DDR4-2133 registered DIMM with ECC and quad-rank x4 organization ensures robust data integrity and high memory density for virtualization and in-memory databases. The registered signaling and CL15 latency deliver stable command/address integrity under heavy load, while the quad-rank configuration maximizes capacity per channel in platforms requiring deep memory footprints.

Technical Specs & Insights

1. ECC memory detects and corrects single-bit errors in real time, safeguarding transactional databases and financial computations against silent data corruption.
2. Registered signal buffering decouples the memory controller from the DRAM chips, ensuring rock-solid signal integrity in servers fully loaded with high-capacity modules.
3. A generous 32 GB per module allows dense virtualization footprints, letting data centers run more concurrent VMs per physical host without memory bottlenecks.
4. Quad Rank x4 organization keeps all memory bank groups active, delivering sustained bandwidth under heavy consolidation workloads typical of enterprise hypervisors.
5. Operating at just 1.2 V reduces overall server power draw and cooling overhead in densely populated racks, directly translating to lower TCO for hyperscale deployments.

Why These Specs Matter

The M386A4G40EM2-CPB is a 32GB DDR4-2133 Registered DIMM engineered exclusively for enterprise servers, where every clock cycle carries business-critical transactions. Its four defining characteristics directly answer the real-world demands of data centers. ECC correction is your safety net against silent data corruption: in a dense virtualization farm, a single undetected bit-flip can crash a hypervisor or quietly poison a financial database record, triggering compliance violations and revenue loss. This module catches and corrects those errors on the fly. The Registered buffer re-drives command and address signals, preserving rock-solid signal integrity when you fully populate memory channels to support massive in-memory databases like SAP HANA or large Redis clusters, eliminating boot failures and unexplained node instability. Its Quad Rank x4 architecture interleaves multiple independent DRAM banks, boosting bandwidth and cutting latency under heavy concurrency; you see this as faster analytical queries and seamless VM failover. Finally, the 1.2V DDR4 power envelope shrinks the thermal footprint across dense rack deployments, directly lowering cooling costs. This memory is not a commodity component—it is a deterministic foundation for always-on, data-intensive operations where stability and throughput must never be negotiable.

Endurance & Reliability

General Virtualization
For a typical hypervisor hosting mixed VMs, balance capacity and memory bandwidth by populating all memory channels symmetrically. Equip a dual-socket server with one 32GB quad-rank RDIMM per channel (e.g., 12 modules for 384GB total) to avoid performance penalties from unbalanced configurations while leaving room for scaling.

In-Memory Database
In-memory databases like SAP HANA or Redis demand maximum capacity and data integrity. Fully populate every DIMM slot with these 32GB ECC Registered modules to reach 1 TB or more, ensuring all modules are identical to maintain reliable quad-rank operation. ECC protection is essential to prevent silent data corruption in mission-critical datasets.

High-Performance Computing
HPC workloads benefit from the bandwidth delivered by populating one DIMM per channel. Although 2133 MT/s is modest, using these quad-rank RDIMMs in a balanced configuration (e.g., 8 modules per socket, 256GB) can sustain large-scale simulations. The Registered ECC feature guarantees run-time stability for long-duration parallel jobs where memory errors would invalidate results.

Verified Compatibility

Server-grade RDIMM rigorously validated. Compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.

FAQ