General

Engineer's Note

Designed for server platforms, this Samsung M393A2G40DB1-CRC 16GB DDR4-2400 Registered DIMM leverages ECC and a dual-rank x4 organization to ensure end-to-end data integrity and improved memory interleaving for demanding virtualization and in-memory database workloads. Its registered signal architecture stabilizes high-capacity configurations by reducing electrical load on the memory controller, while the CAS latency of 17 and 1.2V operation deliver a balance of responsive performance and energy efficiency in dense rack deployments.

Technical Specs & Insights

1. ECC protection silently detects and corrects single-bit memory errors, safeguarding financial transactions and database integrity in always-on enterprise servers.
2. Registered signal buffering decouples the memory controller from the ranks, enabling large-capacity deployments that keep hyperscale virtualization clusters stable under full load.
3. Dual Rank x4 architecture keeps memory channels fully saturated, delivering consistent throughput for heavy multi-tenant workloads and real-time analytics.
4. Generous module capacity allows dense server nodes to host more virtual machines and in-memory databases without swapping, improving consolidation density and lowering software licensing overhead.
5. 1.2V low voltage operation measurably cuts power draw and heat generation across populated racks, reducing cooling demands and improving overall data center energy efficiency.

Why These Specs Matter

The Samsung M393A2G40DB1-CRC is a 16GB DDR4-2400 Registered ECC DIMM purpose-built for demanding server roles like virtualization clusters and in-memory databases. In a virtualized environment, silent data corruption from bit flips can crash hypervisors or propagate errors across VMs; the onboard ECC actively corrects single-bit errors, safeguarding workload integrity. Its Registered design buffers command and address signals, reducing electrical load on the CPU memory controller. This allows you to fill all channels with high-density DIMMs while maintaining stable 2400MT/s operation—critical when you need hundreds of gigabytes for dense VM consolidation. For in-memory databases such as Redis or SAP HANA, where every microsecond counts, the dual-rank x4 organization interleaves memory banks to deliver higher sustained bandwidth and lower effective latency under concurrent access. Thousands of simultaneous queries hit row buffers efficiently, preventing throughput bottlenecks. The low 1.2V voltage keeps thermal load manageable in dense racks, so real-time analytics stay accurate and responsive.

Endurance & Reliability

General Virtualization
For virtualized environments, balance memory bandwidth and capacity by populating at least one 16 GB RDIMM per memory channel. A dual-socket server commonly starts with 8 modules (128 GB total) to support moderate VM density, and can scale to 16 modules (256 GB) when consolidating larger workloads without oversubscribing memory.

In-Memory Database
In-memory databases require the entire dataset to reside in RAM with minimal latency. Deploy these 16 GB RDIMMs at one DIMM per channel to maintain the highest DDR4‑2400 speed, and plan for 16 to 24 modules (256–384 GB) per node. Such configurations sustain real-time analytics and transaction processing while leaving room for dataset growth.

HPC
High-performance computing nodes demand maximum bandwidth per core. Fill all available memory channels—typically 6 or 8 modules per CPU—to enable balanced interleaving. For a dual-socket node, 16 modules (256 GB) provide sufficient capacity for large-scale simulations, weather modeling, or computational fluid dynamics without sacrificing streaming performance.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R740, HPE DL380 Gen10, Lenovo SR630, Cisco UCS C220 M5.

FAQ