General

Engineer's Note

This is a server-class DDR3 RDIMM, engineered for legacy enterprise platforms where data integrity under high-density memory configurations is critical, such as virtualization hosts and in-memory databases. Its registered signal technology and ECC error correction ensure stable operation in multi-DIMM configurations, while the Dual Rank x8 organization and CL7 latency optimize memory access efficiency for sustained server workloads.

Technical Specs & Insights

1. ECC error correction safeguards every data transaction against single-bit corruption, delivering the unwavering reliability required for 24/7 mission-critical enterprise operations.
2. Registered signal buffering maintains clean signal integrity across fully populated channels, enabling the high DIMM density essential for large-scale virtualization hosts.
3. A compact 2GB capacity per module lets legacy server fleets scale memory with fine granularity, avoiding stranded capacity while keeping all memory channels fully balanced.
4. 1066 MT/s throughput provides a stable 8.5 GB/s per channel, sustaining predictable performance for file serving and moderate database workloads without overprovisioning.
5. Dual Rank x8 organization interleaves accesses across internal rank pairs, keeping server memory channels saturated and smoothing out multi-VM response times under heavy consolidation.

Why These Specs Matter

The Samsung M393B5673EH1-CF8 is a server-grade DDR3 RDIMM module, and in the very environments where uptime and data integrity are non-negotiable, its four core characteristics move from specifications to operational necessities. The ECC engine is your first line of defense: in a virtualization cluster running a dozen VMs per host, a single uncorrected bit flip in a memory page can crash a critical workload or silently corrupt a transaction log. ECC detects and corrects single-bit errors in real time, directly shielding your consolidated services from this invisible yet costly risk. With Registered signal buffering, you can densely populate 18 or 24 DIMM slots without overloading the memory controller. This means you reliably scale to hundreds of gigabytes for an in-memory database like Redis or SAP HANA, where a dropped rank caused by signal degradation would stall your entire analytics pipeline. The dual‑rank x8 organization delivers rank interleaving, effectively overlapping access cycles. Under heavy concurrent queries, this allows your database engine to stream data with measurably lower average latency than a single‑rank equivalent. Paired with a CAS latency of just 7 cycles at 1066MHz, the module delivers tight response times, keeping CPU cores fed during high-frequency reads—exactly what you need when a real‑time fraud detection model fires thousands of lookups per second against a 512GB dataset. Every one of these features translates directly into hardened stability and faster insight for the data center.

Endurance & Reliability

General Virtualization
When deploying the 2GB DDR3-1066 ECC RDIMM in a virtualized environment, populate all memory channels identically to enable balanced interleaving and maximize throughput. In a dual-socket server with three channels per CPU, install six modules per processor (12 total) for a 24GB pool, which suits light to moderate VM densities. Avoid mixing different ranks or speeds to prevent the memory controller from down-clocking to the lowest common performance.

In-Memory Database
In-memory databases demand low latency and high capacity, so fill every DIMM slot on the platform with these 2GB modules to reach the maximum addressable memory. Even with dual-rank x8 organization, the CL7 latency and registered ECC functionality help sustain data integrity under heavy caching loads. If the dataset exceeds the achievable capacity with 2GB parts, consider replacing them with higher-density RDIMMs, but keep all channels fully populated to maintain uniform latency.

High-Performance Computing (HPC)
For HPC workloads that prioritize bandwidth over capacity, install one 2GB RDIMM per memory channel to achieve the rated 1066MHz speed with minimal electrical loading. This configuration delivers consistent dual-rank parallelism while avoiding the frequency drop that can occur when populating two DIMMs per channel. In compute nodes processing large models, balance capacity and bandwidth by using two modules per channel only if the extra memory size is critical for problem fit.

Verified Compatibility

Server-grade, rigorously tested RAM. Compatible with Dell PowerEdge R710, HP ProLiant DL380 G7, IBM System x3650 M3.

FAQ