General

Engineer's Note

This is a server-grade DDR3-1066 Registered ECC DIMM, ideally deployed in legacy enterprise servers, virtualization hosts, and memory-intensive workloads such as in-memory databases where data integrity is paramount. The quad-rank x8 configuration combined with registered signaling enhances signal stability and enables high-density memory configurations, while ECC correction safeguards against single-bit errors in mission-critical environments.

Technical Specs & Insights

1. Per-module capacity supplies sufficient headroom for caching hot data sets, keeping lightweight virtualized workloads responsive without over-allocating resources.
2. Integrated ECC circuitry continuously detects and corrects single-bit errors, preserving data integrity for financial transaction logs and long-running scientific simulations.
3. The on-module register re-drives command and address lines, maintaining stable signal integrity across all memory channels in fully populated multi-socket servers.
4. High-rank stacking maximizes total memory per channel slot, enabling larger virtual machine densities for private cloud deployments without adding physical servers.
5. Tight column-access latency accelerates row-to-column transitions, cutting read delays for latency-sensitive online transaction processing databases.

Why These Specs Matter

For mission-critical server environments, the Samsung M393B5173DZD-CF8 4GB DDR3 Registered DIMM delivers a balance of reliability and performance where it matters most. Its ECC protection silently detects and corrects single-bit memory errors, guarding against silent data corruption that can crash virtualized workloads or corrupt financial databases. The registered signal buffer decouples the memory controller from the electrical load of multiple modules, letting you populate all memory channels without signal degradation — essential when scaling to 128GB or higher in a VMware ESXi cluster. With a quad-rank x8 architecture, the module interleaves more internal banks, boosting command parallelism and bandwidth for memory-intensive applications like in-memory caching with Redis or real-time analytics. A native CAS latency of 7 at 1066MHz provides deterministic low-latency access, vital for SQL queries hitting large buffer pools. In practical terms, this RDIMM ensures your virtual machines stay online during peak loads and your database transactions remain consistent, turning hardware stability into business continuity.

Endurance & Reliability

General Virtualization
For a typical hypervisor hosting mixed VMs, populate at least six to eight identical 4GB RDIMMs across triple-channel or quad-channel memory controllers to balance capacity and bandwidth. A 24GB to 32GB total footprint allows you to run 10–15 light-to-medium VMs without excessive swapping, while Registered ECC ensures data integrity for long-running guests.

In-Memory Database
Low latency is critical, so install modules in multiples of the memory channels — three or six DIMMs per CPU on legacy triple-channel platforms or four on quad-channel systems. Target 64GB or more using 16 identical 4GB RDIMMs to hold entire datasets in RAM; ECC scrubbing guards against bit-flip errors that could corrupt live transactional data.

High-Performance Computing
HPC jobs often demand sustained memory bandwidth, so populate all channels symmetrically with the largest supported quantity of quad-rank 4GB RDIMMs — typically six or eight per socket. For memory-bound simulations, a 96GB or 128GB configuration minimizes swap I/O, and using Registered DIMMs stabilizes the high-rank loading required by dense node configurations.

Verified Compatibility

Proven compatible with Dell R720, HP DL380p Gen8, and other DDR3 servers.

FAQ