General

Engineer's Note

This is a registered DDR4-2400 server memory module with ECC, engineered specifically for enterprise platforms requiring uncompromised data integrity in virtualized environments and in-memory database applications. Its dual-rank x4 organization and registered signal topology enhance signal stability under heavy load, while the CL17 latency and 1.2V operating voltage deliver a reliable balance of power efficiency and data throughput.

Technical Specs & Insights

1. A 16GB capacity per module enables higher virtual machine density, maximizing consolidation ratios in virtualized data centers.
2. 2400 MHz operation translates to 19.2 GB/s of peak bandwidth, preventing bottlenecks in data-intensive analytics and large-scale database queries.
3. ECC protection corrects single-bit errors and detects multi-bit faults, preserving data integrity for mission-critical financial and healthcare transaction systems.
4. Registered signal buffering stabilizes high-capacity memory configurations, allowing servers to reliably scale to large RAM footprints without signal degradation.
5. Dual Rank x4 organization interleaves memory accesses to fully saturate channels, boosting throughput for in-memory caching and heavy virtualization workloads.

Why These Specs Matter

The Samsung M393A2G40DB1-CRC4Q is a 16GB DDR4-2400 Registered DIMM built exclusively for enterprise servers, where its four defining characteristics turn into concrete business assurances. ECC error correction is your first line of defense in a dense virtualization cluster; a single-bit flip caused by background radiation can silently corrupt a guest operating system or a financial transaction, but this module catches and corrects that error on the fly, preserving 24/7 service integrity. The Registered buffer then lets you scale memory confidently—when you need to fill all 24 slots for massive 384GB+ in-memory databases like SAP HANA, the buffer stabilizes command signals so the platform boots and runs without training failures or intermittent crashes. Its dual-rank x4 design employs bank interleaving to lift effective bandwidth, which directly translates to lower latency for simultaneous analytical queries and faster commit times during peak loads. Finally, the strict 1.2V operation shrinks power draw per DIMM, materially cutting cooling overhead across an entire rack. For teams managing virtualized infrastructure and real-time data platforms, this module is not a commodity part—it is the silent guarantee that your transactions remain accurate, your performance stays predictable, and your operating costs stay controlled.

Endurance & Reliability

General Virtualization
Populate all memory channels with identical M393A2G40DB1 16GB RDIMMs to balance capacity and bandwidth. A recommended baseline uses 8 modules (128GB) on a typical dual-socket board, leaving expansion slots free. Matching dual-rank x4 modules avoid interleave conflicts and simplify NUMA-aware provisioning.

In-Memory Database
Maximize capacity by installing two DIMMs per channel (2DPC) whenever the platform supports it, using this registered module exclusively. A 2DPC setup reaches 256–512GB on common two-socket servers, providing the large footprint that in-memory stores require. Maintain identical part numbers to prevent training issues under sustained 24/7 load.

High-Performance Computing (HPC)
Prioritize bandwidth by configuring one DIMM per channel (1DPC) to sustain the full DDR4-2400 speed. An 8-channel node equipped with 8 modules delivers 128GB, while the dual-rank design feeds each channel efficiently during vectorized kernels. This configuration lowers latency variation across MPI ranks and keeps per-core memory wall time predictable.

Verified Compatibility

Rigorously tested server memory compatible with Dell PowerEdge R730/R740, HPE ProLiant DL380 Gen9/Gen10, Lenovo ThinkSystem SR650.

FAQ