General

Engineer's Note

This 32GB DDR4-2400 Registered ECC RDIMM is engineered for server platforms, delivering robust data integrity for memory-intensive workloads such as virtualization, in-memory databases, and enterprise applications. Its dual-rank x4 organization and registered signal architecture enhance signal stability and bandwidth efficiency in multi-DIMM configurations, ensuring reliable 24/7 operation under heavy load.

Technical Specs & Insights

1. ECC protection actively detects and corrects single-bit memory errors, preventing silent data corruption that could crash critical databases or financial transaction logs.
2. Registered signal buffering decouples the memory controller from the DIMM’s electrical load, enabling fully populated server configurations to run stably without timing degradation.
3. RDIMM architecture ensures the module meets the rigorous signal integrity demands of multi-socket servers, making it the reliable backbone for always-on enterprise workloads.
4. Dual Rank x4 organization interleaves pages across rank groups, delivering sustained bandwidth improvements that directly translate to higher VM density and smoother live migration.
5. A generous thirty-two gigabyte capacity per stick maximizes memory channels in dense nodes, allowing infrastructure teams to run large in-memory caches and more containers per host.

Why These Specs Matter

The M393A4K40BB1-CRC is a server-grade DDR4 RDIMM, and its four defining characteristics—ECC error correction, registered signal buffering, dual-rank architecture, and a substantial 32GB capacity—are not just specifications on paper; they are direct answers to the relentless demands of modern data centers. Take a dense virtualization cluster running dozens of mission-critical VMs per host. Here, a single undetected bit flip in memory can corrupt transactions or silently crash instances. The module’s integrated ECC rigorously detects and corrects single-bit errors in real time, preserving data integrity at the silicon level. Simultaneously, its registered buffer isolates the electrical load of the DRAM chips from the memory controller. This means you can populate all channels with high-capacity DIMMs without signal degradation, unlocking the massive memory pools required for agile VM migration and consolidation. Now consider an in-memory database such as Redis or SAP HANA, where latency is measured in nanoseconds. The dual-rank x4 organization interleaves internal accesses across two independent sets of memory arrays, delivering higher sustained bandwidth for concurrent queries. Combined with the 32GB density, you need fewer modules to reach terabyte-scale footprints, reducing interconnect overhead and thermal stress. Built at a power-sipping 1.2V and operating at DDR4-2400, this module ensures that your real-time analytics pipeline or 24/7 transactional engine runs with the deterministic stability that no cheap desktop alternative can ever guarantee.

Endurance & Reliability

General Virtualization
Equip a dual-socket server with a balanced layout of eight or more of these 32 GB Registered ECC DIMMs, populating at least one module per memory channel to reach 256 GB. This provides ample headroom for dozens of VMs while registered buffering and error correction ensure multi-tenant stability. Leave half the slots free to scale capacity without replacing existing assets.

In-Memory Database
Maximize capacity by installing these dual-rank x4 RDIMMs in every available channel, targeting 384–768 GB per node. The high rank count and registered signaling allow tight timings even at full population, keeping large datasets in low-latency DIMM space. ECC protection is essential to prevent silent data corruption in transaction-heavy, memory-resident workloads.

High-Performance Computing
Build a symmetric memory configuration with one or two DIMMs per channel across all CPUs, typically 8–16 modules for a dual-processor node. This arrangement preserves the full 2400 MT/s speed while delivering high sustained bandwidth. Registered ECC operation guards against soft errors during long simulation runs, and the dual-rank design improves rank interleaving for better memory-level parallelism.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R740, R640, HP ProLiant DL380 Gen10, Lenovo SR650, and Supermicro X11 servers.

FAQ