General

Engineer's Note

Designed for legacy enterprise servers, this Samsung DDR3-1866 RDIMM (M393B5273QB0-CMA) leverages registered signal buffering and ECC to deliver rock-solid data integrity under sustained loads, making it ideal for virtualization hosts and in-memory databases on older-generation platforms. Its dual-rank x8 configuration at CL13 maximizes per-channel capacity utilization and throughput stability, directly benefiting memory-bound workloads that demand consistent low latency.

Technical Specs & Insights

1. ECC error correction silently detects and fixes single-bit faults, preserving data integrity for transactional databases and long-running enterprise workloads where even undetected corruption is unacceptable.
2. Registered signal buffering reduces the electrical load on the host memory controller, delivering rock-solid signal stability across fully populated 24‑DIMM servers that must run without interruption.
3. Dual Rank x8 organization enables rank interleaving to overlap memory accesses, keeping throughput consistently high when multiple virtual machines compete for shared bandwidth.
4. 1866 MHz clock speed provides the PC3‑14900 peak transfer rate, accelerating in‑memory caches and moderate I/O‑intensive applications that demand predictable response under sustained load.
5. 4 GB module capacity gives data‑center operators fine‑grained control over memory provisioning, allowing cost‑effective channel‑interleaving configurations and lower entry hurdles for lightweight virtualization hosts.

Why These Specs Matter

Deploying the M393B5273QB0-CMA, a server DDR3-1866 RDIMM, directly addresses the pain points of running virtualized clusters and in-memory databases. Its ECC technology corrects single-bit errors on the fly, safeguarding your hypervisor and data integrity from silent corruption that could trigger unexpected VM failures or corrupt database transactions. The registered clock driver buffers signals so you can fully populate memory channels without instability, which is critical when scaling capacity for large dataset processing. The dual-rank x8 design leverages rank interleaving to maximize bandwidth, enabling multiple VMs or complex OLAP queries to access memory concurrently with reduced contention. The 1866MHz operating frequency and CL13 timing deliver responsive data retrieval, reducing CPU idle cycles during high-frequency trading or real-time analytics. Together, these four attributes give you higher VM density, faster database results, and ironclad stability—preventing the downtime that erodes client trust.

Endurance & Reliability

The Samsung M393B5273QB0-CMA is a 4GB DDR3-1866 Registered ECC RDIMM, placing it firmly in the server memory category. Its error correction and registered signaling make it suitable for data-integrity workloads. Capacity planning must balance channel population, speed, and total capacity.

General Virtualization
Virtualized hosts rely on ample, balanced memory. Populate all memory channels identically to maintain interleaving and avoid NUMA bottlenecks. With these 4GB modules, a dual-socket server using 8 channels should start with one DIMM per channel (8 modules, 32 GB) for light workloads. Scale to two DIMMs per channel (16 modules, 64 GB) to host many virtual machines while preserving 1866 MHz speed.

In-Memory Database
In-memory databases demand maximum capacity and sustained low latency. Fully populate every slot while respecting identical rank configurations to keep dual-rank x8 timing. In an 18-slot server, 18 of these 4GB DIMMs yield 72 GB—acceptable for a small dataset. For larger sets, combine modules across all channels and sync population; never mix capacities, as that degrades ECC scrubbing and bandwidth.

High-Performance Computing
HPC prioritizes memory bandwidth per core. Install one DIMM per channel (e.g., 8 modules, 32 GB) to achieve peak channel interleaving and theoretical throughput. This balanced configuration feeds CPU caches efficiently for scientific simulations. If capacity-bound, upgrade to full channel population while maintaining the same DIMM count across channels to avoid frequency downgrades.

Verified Compatibility

Rigorously tested server memory, validated for Dell PowerEdge R720, HP ProLiant DL380p Gen8, Supermicro X9 systems, and more.

FAQ