General

Engineer's Note

This 16GB DDR4-2400 Registered ECC module, built with a single-rank x4 organization and a CAS latency of 17, is engineered for enterprise servers powering virtualization and in-memory database workloads where uncompromising data integrity and low bus loading are essential. Its 1.2 V registered design provides stable signal buffering for dense multi-DIMM configurations, while the integrated ECC actively corrects single-bit errors to ensure continuous, corruption-free operation.

Technical Specs & Insights

1. ECC error correction safeguards data integrity, essential for preventing silent data corruption in mission-critical enterprise databases.
2. Registered signal buffering stabilizes high-capacity memory configurations, enabling seamless scaling to support large virtualized workloads without compromising signal integrity.
3. 16GB per module strikes the ideal balance for dense cloud servers, maximizing VM density per rack unit while maintaining a low cost per gigabyte.
4. 2400 MT/s throughput delivers consistent memory bandwidth, accelerating in-memory analytics and real-time processing in always-on enterprise applications.
5. Single Rank x4 organization reduces electrical loading on the memory bus, allowing fully populated server boards to sustain higher clock frequencies for predictable performance.

Why These Specs Matter

The Samsung M393A2K40BB1-CRC4Q is a DDR4-2400 Registered DIMM with ECC, purpose-built for server environments where uptime and data fidelity are non-negotiable. Its four defining characteristics translate directly into operational resilience. Electronic noise or cosmic radiation can silently flip a memory bit; the integrated ECC engine detects and corrects these errors in real time, preventing database corruption that could cascade into billing inaccuracies or inventory mismatches in transactional systems. The Registered signal buffer re-drives address and command lines, enabling a single server to populate all memory channels with 16 GB RDIMMs without signal degradation. For a virtualized cluster running dozens of VMs on one node, this means you can provision large, stable memory pools without unexpected hypervisor crashes. The Single Rank x4 organization balances latency and bandwidth, delivering consistent CL17 access times crucial for in-memory databases like Redis or SAP HANA—every nanosecond saved in query response directly accelerates user-facing analytics or financial trades. Finally, the 1.2 V operating voltage reduces thermal load across dense rack deployments, shrinking cooling costs and extending the service life of adjacent components in a 24/7 data center.

Endurance & Reliability

General Virtualization
For balanced density and cost, populate one 16GB RDIMM per channel across all available memory channels. In a dual-socket server with six channels per CPU, this yields 192 GB using twelve modules—ideal for running dozens of VMs without sacrificing the native 2400 MT/s speed. The single-rank x4 design maintains low latency under mixed workload pressure.

In-Memory Database
Maximize capacity by installing two DIMMs per channel (2DPC), reaching 384 GB in the same dual-socket platform. Although 2DPC may invoke a minor speed step-down, the registered ECC integrity and 2400 base rate still deliver the large, reliable footprint required by Redis or SAP HANA. Use identical Samsung modules to guarantee consistent timing and error protection.

High-Performance Computing
Achieve peak memory bandwidth by sticking to one DIMM per channel, keeping all modules at the full 2400 MT/s. The single-rank RDIMM’s reduced electrical loading improves command scheduling, directly benefiting MPI or simulation codes. A symmetric 96–192 GB configuration across all channels eliminates NUMA bottlenecks and sustains line-speed data delivery for compute-bound workloads.

Verified Compatibility

Rigorously tested for servers. Compatible with Dell PowerEdge R740, HPE DL380 Gen10, Lenovo SR650, and more.

FAQ