General

Engineer's Note

Designed as a server-grade DDR3 RDIMM, this 8GB module leverages registered signaling and ECC to guarantee data integrity and signal stability in multi-DIMM platforms running virtualization or in-memory databases. Its dual-rank x4 organization combined with CL9 latency delivers balanced throughput and reliable performance under sustained enterprise workloads.

Technical Specs & Insights

1. ECC memory actively corrects single-bit errors in real time, shielding financial transactions and virtualization hosts from silent data corruption that could crash critical services.
2. Registered logic buffers the command and address bus, allowing high-density server motherboards to populate all 24 DIMM slots without signal degradation or boot failures.
3. Dual Rank x4 organization interleaves data across two internal rank groups per channel, sustaining throughput during simultaneous database queries and backup jobs.
4. 1333 MHz clock speed provides a balanced bandwidth envelope for mid-range ERP systems, supporting smooth multi-user concurrency without excessive power draw.
5. 8 GB capacity per stick lets IT architects cost-effectively provision 64 GB to 128 GB footprints for virtualized environments running a dozen light-to-moderate VMs.

Why These Specs Matter

When you are managing a virtualized cluster where dozens of workloads share the same physical host, or running an in‑memory database where a single corrupted bit can halt transactions, memory becomes the foundation you cannot afford to doubt. The Samsung M393B1K70CH0-CH905 is an 8 GB DDR3‑1333 Registered ECC DIMM built precisely for these moments, and its four defining characteristics translate directly into operational confidence.

The integrated Error‑Correcting Code (ECC) actively detects and corrects single‑bit errors, a silent threat in dense server farms that can degrade data integrity or trigger unexpected reboots. Registered signal buffering, coupled with a 240‑pin RDIMM architecture, stabilizes the command and address lines when multiple DIMMs populate a single channel. This means you can fully populate 12 or 24 slots without sacrificing signal quality, sustaining large memory footprints for expansive virtual machines and container fleets. The Dual Rank x4 organization further multiplies that advantage: by interleaving accesses across two internal ranks per module, it delivers higher sustained bandwidth and lower average latency for transaction‑intensive databases like SAP HANA or Redis clusters. Even the CL9 latency at 1333 MHz strikes a calculated balance between speed and predictability, ensuring that memory lookups do not become the bottleneck during peak OLTP bursts. From a virtualization host that demands uninterrupted uptime to an in‑memory analytics platform that lives by sub‑millisecond response, this module is engineered to keep your critical services consistent, responsive, and decisively protected.

Endurance & Reliability

General Virtualization
For moderate consolidation of virtual machines, populate at least six to eight of these 8GB DDR3-1333 RDIMMs per server. A balanced configuration of 48–64GB total, spread across three memory channels per processor, ensures reasonable VM density without excessive swapping. Avoid leaving channels empty to maintain uniform memory bandwidth and latency for hypervisor overhead.

In-Memory Database
Latency-sensitive workloads like Redis or Memcached benefit from maximum channel population. Install identical 8GB RDIMMs in every slot—typically 12 or 24 modules in dual-socket servers—to achieve 96–192GB of fully registered ECC memory. This symmetric layout exploits all memory controllers and minimizes NUMA penalties, keeping large datasets entirely in RAM with strong error correction.

High-Performance Computing
HPC clusters demand both capacity and sustained throughput. Use balanced, fully populated memory risers with these dual-rank RDIMMs to reach 64–128GB per node while adhering to the recommended 1333MT/s speed. One DIMM per channel is ideal for peak bandwidth in memory-bound simulations, but a second matched RDIMM per channel can be added if capacity takes precedence, accepting minimal clock-down risk.

Verified Compatibility

Strictly tested server RDIMM. Verified compatible with Dell PowerEdge R710, HP DL380 G7, IBM x3650 M3, and more.

FAQ