General

Engineer's Note

Designed for enterprise servers, this 64GB DDR4-3200 RDIMM leverages ECC and registered signaling to ensure data integrity in virtualization and in-memory database workloads. Its dual-rank x4 configuration improves memory bandwidth utilization while the CL22 latency balances responsiveness and stability for dense multi-DIMM deployments.

Technical Specs & Insights

1. A single high-density 64GB module allows server builds to scale memory effortlessly, supporting expansive virtualized environments without occupying extra slots.
2. The 3200 MT/s transfer rate feeds modern multi-core CPUs efficiently, accelerating real-time analytics and in-memory databases under continuous load.
3. End-to-end ECC protection silently corrects memory faults, safeguarding data integrity for financial ledgers and scientific computations that tolerate zero errors.
4. Registered signal buffering stabilizes command and address lines across fully loaded channels, essential for maintaining uptime in dense multi-DIMM enterprise deployments.
5. Dual-rank x4 organization interleaves memory access to sustain peak bandwidth, delivering consistent response times for virtual machines under heavy consolidation.

Why These Specs Matter

The Samsung M393A8G40AB2-CWECQ is a 64GB DDR4-3200 registered ECC memory module purpose-built for enterprise servers where data integrity and capacity directly define uptime. In a virtualized cluster hosting numerous critical VMs, a single undetected bit-flip can silently corrupt data and trigger cascading application failures. The integrated ECC technology algorithmically corrects single-bit errors in real time, preventing silent corruption in transactional databases and financial systems. The registered buffer reduces command/address bus loading, enabling you to populate all memory channels with multiple high-density DIMMs without sacrificing signal stability—a crucial advantage when scaling to hundreds of gigabytes for in-memory analytics platforms like SAP HANA or Redis. Furthermore, the dual-rank x4 configuration amplifies usable bandwidth through rank interleaving, accelerating query throughput and smoothing live VM migrations. For data centers, this translates directly into uninterrupted service, predictable performance under heavy virtualization, and a drastically lower risk of costly undetected errors.

Endurance & Reliability

This 64 GB DDR4-3200 ECC Registered DIMM (RDIMM, part M393A8G40AB2-CWECQ) targets enterprise servers. The following capacity planning guidelines address typical deployment scenarios.

General Virtualization
Populate identical 64 GB RDIMMs across all memory channels to maximize throughput. For a dual‑socket server with eight channels per CPU, install 16 DIMMs (1 TB) to balance capacity and bandwidth for 30–50 virtual machines. Keep all DIMMs dual‑rank and uniform to avoid timing mismatches.

In‑Memory Database
Fill every channel with two 64 GB DIMMs to achieve 2 TB per dual‑socket node, supporting large in‑memory datasets. The ECC and registered design ensure data integrity under constant heavy load. Distribute DIMMs symmetrically across both processors to minimize non‑uniform memory access latency.

High‑Performance Computing
Limit to one DIMM per channel to sustain the full 3200 MT/s speed. Configure 16 identical 64 GB DIMMs in a dual‑socket system to deliver 1 TB of high‑bandwidth, low‑latency memory for simulation and modeling. This 1‑DIMM‑per‑channel layout keeps multi‑core memory access uniform and maximizes floating‑point throughput.

Verified Compatibility

Rigorously tested server RDIMM compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, Lenovo ThinkSystem SR650 V2.

FAQ