General

Engineer's Note

Designed for server platforms, this Samsung 16GB DDR4-2400 RDIMM with ECC and registered signal type ensures data integrity and stability under heavy memory workloads such as virtualization and in-memory databases. Its single-rank x4 configuration and CL17 latency provide a balance of capacity and efficient memory access, making it ideal for dense multi-DIMM deployments where reliable, error-corrected performance is critical.

Technical Specs & Insights

1. Integrated error correction silently catches and repairs single-bit memory faults, preserving data integrity for financial ledgers and mission-critical databases where even minor corruption is unacceptable.
2. The registered command-and-address buffer isolates the memory controller from electrical loading, allowing fully populated multi-DIMM channels essential for density-hungry virtualization farms.
3. A balanced capacity point provides sufficient headroom per module to consolidate numerous lightweight containers or mid-scale virtual appliances without immediate socket expansion.
4. Single rank built with x4-width components improves per-chip error isolation, reinforcing the robust RAS envelope required by always-on enterprise infrastructure.
5. The standard DDR4 transfer rate combines deterministic bandwidth with energy-conscious operation, keeping response times steady for in-memory caching and software-defined storage under mixed I/O.

Why These Specs Matter

The M393A2K40BB1-CRC is a 16GB DDR4-2400 Registered DIMM with ECC, single‑rank x4 and 1.2V operation. For virtualized clusters, ECC is essential: it corrects single‑bit errors caused by background radiation, preventing silent data corruption that would crash in‑memory databases like Redis or corrupt financial records. The Register chip buffers address and command signals, letting you populate all DIMM slots in a server without signal degradation—critical when each host runs dozens of VMs that demand full memory capacity. Single‑rank x4 organization lowers per‑rank electrical load while leveraging parallel bank accesses, which yields more stable bandwidth under the random, concurrent requests of multiple virtual machines, eliminating the latency jitter known as the noisy neighbor effect. Finally, 1.2V operation cuts per‑module power consumption significantly versus older generations, directly lowering cooling overhead in dense rack deployments. Together, these features deliver hardened data integrity, predictable performance in multi‑tenant environments, and a tangible reduction in operational expense.

Endurance & Reliability

General Virtualization
For a balanced virtualization host, populate at least six 16GB RDIMMs across memory channels to deliver 96GB of usable capacity, allowing comfortable headroom for mixed VM workloads. A 2-DIMM-per-channel configuration retains acceptable latency while maximizing throughput, but avoid populating all slots initially to leave room for growth as VM density increases.

In-Memory Database
In-memory databases demand capacity over raw bandwidth, so fit every available channel with one 16GB module first to maximize total addressable memory before adding a second rank per channel. Target 128GB to 256GB minimum, using single-rank x4 DIMMs like this one to balance low latency with high capacity, and configure the platform to run at the memory’s native 2400 MT/s for stability rather than overclocking.

High-Performance Computing (HPC)
HPC clusters benefit from bandwidth-optimized configurations; install one 16GB RDIMM per channel across all available channels to saturate memory interleaving and drive sustained throughput. Since many HPC codes scale with memory bandwidth per core, a 1-DIMM-per-channel setup using registered DIMMs maintains signal integrity at scale, and a 96GB to 192GB per node baseline keeps cores fed without wasting expensive capacity on non-memory-bound jobs.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ