General

Engineer's Note

This Samsung 8GB DDR3-1333 RDIMM, operating at a low 1.35V with registered logic and ECC, is purpose-built for legacy server environments requiring uncompromising data integrity, making it ideal for virtualization and memory-dense database workloads. Its dual-rank x4 organization maximizes memory bandwidth through rank interleaving while the CL9 latency ensures consistent responsiveness even in fully loaded multi-DIMM configurations.

Technical Specs & Insights

1. Registered signal type buffers the command and address buses, allowing high-density memory configurations without signal degradation, which is essential for maintaining stability in heavily populated server racks.
2. Error Correcting Code (ECC) support autonomously corrects single-bit data errors, safeguarding transactional integrity in financial processing and virtualization clusters.
3. Dual Rank x4 organization interleaves multiple bank groups per channel, maximizing sustained bandwidth for simultaneous request streams in hyper-converged infrastructure.
4. An 8 GB module footprint gives data centers a granular building block, optimizing memory-to-core ratios for containerized workloads without overspending on idle capacity.
5. Operating at a low 1.35 V supply, this module significantly cuts per-DIMM power draw and cooling overhead in dense deployments, directly lowering the total cost of ownership for hyperscale environments.

Why These Specs Matter

When you are running a virtualized cluster or an in-memory database, memory errors and downtime are not an option. The Samsung M393B1K70CH0-YH9Q5N is an 8GB DDR3 RDIMM engineered exactly for that reality. Its built‑in ECC corrects single‑bit errors on the fly, which means silent data corruption from cosmic radiation or electrical noise will not silently propagate through your hypervisor or financial records—your transactions stay exact. The registered signal architecture buffers command and address lines, letting you populate all 24 DIMM slots without signal degradation; this directly translates to higher VM density per host and smoother live migrations. Operating at just 1.35V, it draws noticeably less power than standard 1.5V modules, lowering your cooling costs in a rack full of servers. Configured as dual‑rank x4, it enables rank interleaving, cutting memory latency for database index lookups and powering through analytics workloads with far fewer stalls. In production, those four characteristics together mean reduced TCO, higher availability, and consistent performance under load.

Endurance & Reliability

General Virtualization
With 8 GB RDIMMs, a balanced virtualization host typically requires at least six to eight identical modules per server to achieve 48–64 GB of total memory, leaving room for moderate VM density. Deploy the modules symmetrically across all memory channels (e.g., one DIMM per channel in a dual-socket system) to maintain uniform memory access and avoid NUMA penalties. Since these are low-voltage (1.35 V) DDR3L parts, they also help reduce overall power draw in dense virtualized clusters.

In-Memory Database
In-memory databases demand both capacity and reliability, making ECC Registered DIMMs essential. Populate every available memory slot with these 8 GB dual-rank modules to maximize capacity on legacy DDR3 platforms, aiming for 128 GB or higher per node. Fill channels evenly and enable memory interleaving, as the dual-rank x4 organization provides better bank-level parallelism and helps sustain high transaction throughput under heavy loads.

High-Performance Computing
For HPC workloads, even small memory bandwidth differences matter. Install eight or more identical modules in a balanced configuration (e.g., one DIMM per channel across all available channels) to deliver consistent bandwidth and low latency. The dual-rank design yields a slight bandwidth advantage over single-rank alternatives, while ECC safeguards long-running simulation integrity. On quad-channel platforms, using sixteen 8 GB modules (128 GB total) populating all slots with two DIMMs per channel is a common sweet spot for memory-bound scientific codes.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R720, HP DL380p Gen8, and similar servers.

FAQ