General

Engineer's Note

I'm a hardware engineer evaluating this module—here are my observations.

The Samsung M393A4K40DB2-CWE is a 32GB DDR4-3200 Registered ECC RDIMM, engineered specifically for server-class platforms handling enterprise virtualization, in-memory databases, and data-integrity-critical workloads. Its 1.2V low-power operation, combined with a Registered signal type and ECC, ensures rock-solid signal stability and data reliability in high-capacity multi-rank configurations, while the Dual Rank x4 organization enhances memory interleaving efficiency to reduce latency and boost throughput under sustained access.

Technical Specs & Insights

1. The high-density module allows data centers to maximize memory per server, powering larger in-memory databases and more virtual machines per node.
2. 3200 MT/s transfer rate accelerates data-heavy analytics and real-time processing, reducing latency in cloud workloads.
3. End-to-end error correction safeguards transactional integrity, preventing silent data corruption in financial and scientific computing.
4. The register buffer strengthens signal integrity, enabling fully populated server boards to run stably at top speeds without compromise.
5. Dual-rank interleaving boosts effective bandwidth by alternating access, sustaining throughput under heavy multi-threaded server tasks.

Why These Specs Matter

Designed for servers, the Samsung M393A4K40DB2-CWE 32GB DDR4-3200 RDIMM turns four critical features into real-world reliability and performance. Its ECC correction is your first line of defense against silent data corruption—in a virtualization cluster running dozens of VMs, a single uncorrected bit error can topple a critical workload; this memory detects and fixes these faults on the fly, safeguarding application uptime. The registered buffer ensures signal integrity when populating high-density servers, so you can fill all 24 DIMM slots without compromising stability, essential for scaling memory-hungry hypervisors and container nodes. The dual-rank x4 design interleaves accesses across two ranks, delivering higher sustained bandwidth for in-memory databases like Redis or SAP HANA, where microseconds matter during peak transaction bursts. Finally, operating at just 1.2V, the module significantly lowers power draw compared to older generations. Across a fleet of always-on servers, that efficiency savings in electricity and cooling directly impact your operational budget, making it a smart investment for any virtualized or data-intensive environment.

Endurance & Reliability

General Virtualization
For dense VM hosting, this 32GB DDR4-3200 Registered ECC module delivers the reliability and capacity hypervisors demand. Install identical modules in a balanced configuration—typically 12 units across a dual-socket server’s memory channels to reach 384GB—maximizing bandwidth while avoiding controller bottlenecks and ensuring stable failover headroom.

In-Memory Database
In-memory platforms like SAP HANA or Redis require uncompromising data integrity and low latency. The ECC and CL22 timing protect against silent corruption during high-velocity transactions. Populate all channels with these dual‑rank x4 RDIMMs, targeting 512GB or more per node to hold entire datasets in RAM without sacrificing the 3200MT/s speed.

High-Performance Computing
HPC simulations need both raw throughput and resilient error correction over weeks-long runs. The registered architecture preserves signal quality in densely packed servers. A one‑DIMM‑per‑channel strategy—often 8 or 12 modules per CPU—exploits full 3200MT/s bandwidth, while ECC guards against bit flips that could invalidate computational results.

Verified Compatibility

Strictly tested, server-compatible: Dell PowerEdge R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650 V2.

FAQ