General

Engineer's Note

This DDR4-2133 registered ECC RDIMM is engineered for server platforms running memory-intensive workloads such as virtualization and in-memory databases, where data integrity is non-negotiable. Its dual-rank x8 organization boosts bandwidth through bank interleaving, and the registered signaling with CL15 latency ensures stable, low-latency operation while hardware ECC corrects errors to maintain 24/7 reliability.

Technical Specs & Insights

1. ECC memory actively detects and corrects single-bit errors, safeguarding transactional data integrity in financial and database servers where even a silent corruption is unacceptable.
2. Registered signal buffering decouples the memory controller from the DRAM load, allowing fully populated server boards with high capacity while maintaining rock‑solid signal stability under 24/7 operation.
3. Dual Rank x8 organization enables rank interleaving that raises effective bandwidth, letting a hypervisor serve multiple virtual machines with reduced access contention.
4. An 8 GB capacity provides a balanced memory footprint for entry‑level application servers or scaling‑out microservice nodes without wasting power on overprovisioned resources.
5. DDR4‑2133 speed delivers a reliable 17 GB/s throughput per channel, well suited for running lightweight databases and business logic in power‑constrained rack environments.

Why These Specs Matter

The Samsung M393A1G43DB0-CPB0Q is an 8GB DDR4-2133 registered ECC RDIMM engineered for server platforms where data integrity, capacity scalability, and consistent performance are non‑negotiable. Its four defining characteristics translate directly into real‑world reliability for demanding data‑center workloads.

First, ECC error correction continuously detects and corrects single‑bit memory errors, a critical defense against silent data corruption. In a virtualized cluster hosting dozens of VMs, a single uncorrected bit flip can crash a hypervisor or silently alter financial transaction records — ECC ensures your virtualization stack remains stable and trustworthy. Second, the registered buffer isolates the memory controller from the electrical load of multiple ranks, enabling you to populate all DIMM slots without signal degradation. This means you can scale to 512GB or more per node with confidence, essential for dense consolidation in VMware or Hyper‑V farms. Third, the dual‑rank x8 organization leverages rank interleaving: the memory controller can issue commands to one rank while the other completes a previous access, boosting effective bandwidth by up to 10–15%. For an in‑memory database like SAP HANA or a Redis cache that must serve millions of key‑lookups per second, that extra throughput directly reduces query latency. Finally, the 1.2V operating voltage lowers thermal output and power draw compared to earlier generations — in a rack of 40 nodes, the cumulative energy savings and reduced cooling load measurably cut your total cost of ownership, all while preserving the rugged stability your enterprise applications demand.

Endurance & Reliability

General Virtualization
For a hypervisor host running multiple VMs, populate all memory channels evenly with identical 8GB RDIMMs to maximize bandwidth. A common configuration is 8 or 12 modules (64–96GB), allowing per-VM allocation while leaving headroom for ballooning and failover.

In-Memory Database
In-memory databases demand large capacity and low latency, so install at least 16 of these dual-rank DIMMs (128GB) across all channels, fully populating a dual-socket server. Use the maximum supported speed and disable NUMA interleaving where beneficial to keep data local to the processor.

High-Performance Computing (HPC)
For memory-bandwidth-bound HPC workloads, aim for a balanced configuration of one DIMM per channel to avoid rank-stalling, typically 8 or 16 modules per node. Leverage the ECC and registered signaling to maintain data integrity under sustained parallel processing; consider populating only half the slots if per-core capacity requirements are modest, preserving all-channel throughput.

Verified Compatibility

Rigorously tested server memory. Compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen11, and Lenovo ThinkSystem SR650.

FAQ