General

Engineer's Note

Based on the registered ECC configuration and RDIMM genre, this is a server-class DDR4-2400 memory module optimized for enterprise platforms running virtualization, in-memory databases, and workloads demanding high data integrity. Its single rank x4 organization and registered signal type enhance signal stability and reduce electrical loading on the memory bus, ensuring reliable operation and sustained throughput in high-density server deployments.

Technical Specs & Insights

1. Error-correcting code (ECC) silently detects and repairs single-bit data corruption, safeguarding transactional integrity in always-on database servers.
2. Registered signal buffering stabilizes command and address lines, allowing dense multi-DIMM populations that maximize hypervisor memory pools for heavy virtualization.
3. Single-rank x4 DRAM organization confines hard faults to narrower bits and reduces bus loading, giving analytical workloads resilient uptime under sustained memory pressure.
4. The balanced throughput profile supplies consistent bandwidth for simultaneous containerized microservices, avoiding bottlenecks in software-defined storage layers.
5. Low-voltage operation shrinks power draw and cooling demands across rack-scale deployments, directly improving datacenter TCO without sacrificing reliability.

Why These Specs Matter

Designed as a server-grade RDIMM, the M393A1G40EB1-CRC4Q directly addresses the pain points that keep IT architects awake at night. In a dense virtualization cluster hosting dozens of VMs, a single undetected bit-flip can cascade into hypervisor crashes and silent data corruption across critical workloads. The module’s ECC technology continuously detects and corrects single-bit errors, transforming potential disasters into non-events and preserving the integrity of every transaction. Its registered architecture buffers command and address signals, which means you can populate all memory channels with multiple DIMMs without sacrificing signal stability or clock synchronization—essential when you need to scale a VMware or KVM farm to hundreds of gigabytes with absolute reliability.

For an in-memory database like SAP HANA or Redis, latency is revenue. The single-rank x4 organization reduces electrical loading on the memory bus, enabling more consistent access timings and lower jitter under heavy concurrent queries; combined with the CL17 latency and 2400MT/s bandwidth, it accelerates real-time analytics where microseconds matter. Meanwhile, operating at just 1.2V, it cuts power consumption per DIMM significantly across a rack full of servers—directly lowering cooling demands and operational costs without compromising the performance your databases demand. This memory turns infrastructure stability and energy efficiency from checklist items into competitive advantages.

Endurance & Reliability

General Virtualization
For a typical hypervisor hosting multiple VMs, deploy a balanced configuration of two or four of these 8GB RDIMMs to achieve 16GB or 32GB. Install modules in identical pairs to enable dual- or quad-channel memory interleaving, which boosts throughput for simultaneous workloads. ECC and registered buffering ensure stability under sustained memory pressure from mixed guest operating systems.

In-Memory Database
In-memory databases demand both high capacity and uncompromising data integrity. Populate all available memory channels with these 8GB RDIMMs to reach at least 64GB, using a uniform DIMM-per-channel layout. The registered, single-rank design allows dense population without sacrificing signal quality, while ECC corrects single-bit errors, critical for caching and transactional workloads where data corruption is unacceptable.

High-Performance Computing
HPC applications thrive on maximum memory bandwidth. Configure the server with one RDIMM per channel—typically eight modules for 64GB—to fully saturate the platform’s parallel memory paths. Single-rank x4 DIMMs at 2400MHz provide lower latency and higher sustained throughput compared to dual-rank alternatives under heavy floating-point and vectorized computations. Registered buffering permits scaling to multiple DIMMs per channel if larger total capacity is eventually required without compromising cluster reliability.

Verified Compatibility

Rigorously tested Samsung 8GB DDR4-2400 RDIMM, compatible with Dell PowerEdge R730, HPE DL380 Gen9, Lenovo SR650.

FAQ