General

Engineer's Note

This is a server-class DDR4-3200 Registered DIMM with ECC, making it ideally suited for virtualization hosts, in-memory databases, and mission-critical workloads where data integrity and system stability are non-negotiable. Its dual-rank configuration enhances memory interleaving for improved bandwidth efficiency, while the registered signal type and CL22 latency provide robust signal integrity and consistent performance under heavy, sustained loads.

Technical Specs & Insights

1. ECC memory actively detects and corrects single-bit errors, ensuring data integrity for financial transactions and database operations that cannot tolerate silent corruption.
2. Registered signal buffering stabilizes command and address lines across fully populated memory channels, making it essential for scaling to terabytes in virtualized enterprise servers.
3. Dual rank organization interleaves access across two internal ranks, sustaining peak throughput when multiple virtual machines compete for memory resources under heavy consolidation.
4. High-speed operation delivers the elevated bandwidth required for real-time analytics and in-memory caching, keeping latency low in data-intensive SaaS platforms.
5. Generous module capacity maximizes memory density per server node, allowing denser container deployments and larger RAM disks without resorting to slower storage swapping.

Why These Specs Matter

The Samsung M393A4K40EB3-CWEC0 is a 32GB DDR4-3200 Registered ECC DIMM engineered for enterprise servers, where reliability directly translates to revenue protection. Its Error Correcting Code (ECC) functionality silently detects and corrects single-bit memory errors that naturally occur due to cosmic radiation or electrical noise. In a virtualization cluster hosting dozens of virtual machines, a single uncorrected bit flip can corrupt a hypervisor page table, cascading into simultaneous guest crashes and hours of forensic recovery. ECC turns this catastrophic risk into a transparent, logged event, ensuring uninterrupted multi-tenant service. The Registered (RDIMM) design employs a buffer chip to decouple the memory controller from the heavy electrical load of high-density modules. This allows a single server to populate all 24 DIMM slots with 32GB dual-rank modules like this one, delivering 768GB of stable capacity for an in-memory database such as Redis or SAP HANA. Without registration, signal integrity would degrade at such capacities, causing intermittent boot failures under load. Finally, the dual-rank organization at 3200MT/s with CL22 latency optimizes bandwidth by interleaving accesses across two internal 64-bit blocks, consistently feeding the CPU with data. This directly accelerates real-time analytics queries on massive datasets, where every extra gigabyte-per-second of throughput compresses report generation from minutes to seconds.

Endurance & Reliability

Capacity Planning Guide

This 32GB DDR4-3200 ECC Registered RDIMM (Dual Rank, 1.2V) is server-grade memory built for data integrity and scalability. Use the load-specific guidelines below to optimally populate your platform.

General Virtualization
Populate 8 to 16 identical modules across all memory channels to maximize capacity while sustaining balanced performance. A 1DPC (one DIMM per channel) configuration retains full 3200 MT/s speed; moving to 2DPC allows greater total capacity with a minor speed step to 2933 MT/s on many platforms. Always deploy uniform modules to guarantee consistent ECC operation.

In-Memory Database
Achieve extreme capacity and low latency by filling every slot with these 32GB RDIMMs, preferably one per channel to maintain full 3200 MT/s operation. The dual-rank design boosts bandwidth utilization. For critical datasets, enable mirrored or lockstep RAS modes to reinforce error correction beyond standard ECC.

High-Performance Computing (HPC)
Populate all channels symmetrically with identical 32GB DIMMs, typically 8 or 16 per dual-socket server. Dual-rank architecture and 3200 MT/s speed increase per-core bandwidth for simulation and modeling. Keep memory balanced across NUMA nodes and never mix capacities or ranks to avoid performance downgrades.

Verified Compatibility

Rigorously tested server memory for Dell PowerEdge R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650 V2.

FAQ