General

Engineer's Note

The M393A2G40DB0-CRC is a server-class DDR4-2400 Registered DIMM with ECC, optimized for virtualization, in-memory databases, and enterprise workloads where data integrity is paramount. Its dual-rank x4 configuration and registered signal type ensure stable operation under heavy memory loads, while CL17 latency and ECC protection deliver consistent, error-free performance in multi-socket platforms.

Technical Specs & Insights

1. Error-correcting code protection silently detects and corrects single-bit errors in real time, preserving data integrity for virtualized databases and financial transaction logs that cannot tolerate silent corruption.
2. Registered signal buffering stabilizes high-capacity memory populations, enabling fully populated multi-channel configurations that sustain reliability under 24/7 operation in dense rack servers.
3. Dual Rank x4 organization interleaves memory accesses across more banks, saturating the channel and delivering consistent, jitter-free throughput for heavily consolidated virtual machines.
4. The 2400MT/s DDR4 interface supplies ample bandwidth for in-memory caching and real-time analytics, ensuring fast response times even as concurrent user loads spike.
5. A 16GB module footprint allows IT architects to configure 128GB or more per server node, significantly increasing the density of containers and VMs without sacrificing memory channel speed.

Why These Specs Matter

Engineered specifically for enterprise server environments, the Samsung M393A2G40DB0-CRC is a DDR4-2400 Registered DIMM that directly addresses the critical demands of data centers. Its four defining features transform reliability and performance from specifications into real-world business outcomes.

First, integrated ECC technology continuously detects and corrects single-bit memory errors caused by cosmic radiation or electrical noise. In a dense virtualization cluster hosting dozens of virtual machines, a silent bit-flip can corrupt a financial transaction or hypervisor operation, leading to cascading failures. ECC prevents such catastrophic downtime, ensuring data integrity for mission-critical workloads. Second, the Registered signal buffer stabilizes high-capacity memory configurations by re-driving address and command signals. This allows your server to scale smoothly to hundreds of gigabytes without signal degradation, a necessity when running memory-hungry in-memory databases like SAP HANA or Redis. Third, the Dual Rank x4 organization enables effective interleaving, which boosts bandwidth by allowing simultaneous access across internal banks. For an in-memory analytics platform, this directly translates to faster query responses and real-time insights, turning raw data into value without delay. Finally, operating at a low 1.2V, this module reduces overall server power consumption and cooling overhead in densely packed racks, lowering your total cost of ownership. For the IT architect, these traits mean building a resilient, high-throughput foundation where application uptime, consistent performance under load, and long-term hardware stability are non-negotiable.

Endurance & Reliability

General Virtualization
Populate all memory channels symmetrically with one 16 GB RDIMM per channel on a dual‑socket server. For a typical six‑channel platform that means 12 identical modules, yielding 192 GB of balanced bandwidth. This configuration supports dozens of mixed‑workload VMs while leaving room for reliability features like memory mirroring or sparing.

In‑Memory Database
Maximize capacity by filling every DIMM slot, deploying two modules per channel (2DPC) with these 16 GB RDIMMs. A four‑socket server with six channels per CPU can hold 48 DIMMs, delivering 768 GB to keep an entire dataset in RAM. Accept the slight speed drop to 1866 MT/s; avoiding disk I/O is far more critical, and homogenous population preserves NUMA interleaving performance.

High‑Performance Computing (HPC)
Stick to one 16 GB RDIMM per channel (1DPC) to sustain the full 2400 MT/s bandwidth. In a dual‑socket machine with eight channels per CPU, 16 modules provide 256 GB of high‑speed memory. This symmetrical layout eliminates NUMA bottlenecks and gives simulation or modeling codes the consistent throughput they need for large‑scale parallel runs.

Verified Compatibility

Rigorously tested server memory: compatible with Dell R740, HPE DL380 Gen10, Lenovo SR650, and more.

FAQ