General

Engineer's Note

This is a server-grade DDR4-2133 RDIMM module tailored for enterprise platforms running virtualization and memory-intensive databases, where the combination of ECC error correction and registered signal buffering ensures uncompromising data integrity and electrical stability under high-density configurations. Its single-rank x4 organization with CL15 latency strikes an optimal balance between efficient memory bandwidth and reduced thermal footprint, making it a durable choice for continuous, mission-critical workloads.

Technical Specs & Insights

1. End-to-end error correction guards against silent data corruption, essential for preserving the integrity of financial transactions and long-running virtualization workloads.
2. Buffered command and address signaling maintains electrical integrity across fully populated server boards, enabling maximum memory capacity for dense virtual machine deployments.
3. The registered DIMM architecture provides the deterministic reliability and uptime demanded by mission-critical enterprise applications in always-on data centers.
4. A single-rank x4 organization reduces bus loading and crosstalk, improving signal stability when scaling to large memory configurations in multi-slot servers.
5. An aggressive CAS latency speeds up data access to in-memory databases and caching layers, directly boosting transaction throughput under heavy query concurrency.

Why These Specs Matter

The M393A1G40EB1-CPB is an 8GB DDR4-2133 RDIMM purpose-built for enterprise servers. Its ECC technology silently corrects single-bit errors, a safeguard that directly prevents data corruption in virtualized clusters—meaning a hypervisor crash from a stray cosmic ray never brings down your production VMs. The registered buffer decouples electrical loads, so when you scale up to massive capacities for an in-memory database like SAP HANA, every access remains crisp and error-free. The single-rank x4 configuration reduces command bus congestion, letting the memory controller deliver low, predictable latency under sustained transactional workloads, essential for real-time analytics where milliseconds cost money. Operating at just 1.2V, it also drives down power consumption across dense racks, cutting cooling costs without sacrificing performance. With this module, what you get is a reliable building block where each of these features works in concert to keep your critical services running, your data accurate, and your operational expenses in check.

Endurance & Reliability

General Virtualization
Deploy this 8GB DDR4-2133 ECC RDIMM by fully populating all memory channels to maximize bandwidth for mixed VM workloads. For a typical dual-socket server with six channels per CPU, install twelve identical modules (96 GB total) in a balanced 1 DIMM per channel (1DPC) configuration to enable memory interleaving and avoid performance penalties.

In-Memory Database
Capacity is the priority, so leverage all available DIMM slots, even at 2DPC where the speed may drop to 1866 MT/s. Populate every socket symmetrically with these single-rank x4 RDIMMs—for example, 24 modules yield 192 GB—to provide a large, reliable in-memory footprint. Mixing with other capacities or ranks is not recommended, as it disrupts rank interleaving and can increase latency for real-time analytics.

High-Performance Computing (HPC)
Memory bandwidth is critical; use one module per channel to sustain the maximum 2133 MT/s speed and keep all memory channels active. In a dual-socket HPC node with eight channels per CPU, install sixteen 8 GB sticks (128 GB total) in a 1DPC layout, ensuring each CPU accesses local memory optimally. This uniform configuration reduces NUMA imbalances and delivers consistent, low-latency performance for tightly coupled parallel jobs.

Verified Compatibility

Rigorously tested server memory. Compatible with Dell PowerEdge R760, HPE DL380 Gen10, Lenovo SR650, and more.

FAQ