General

Engineer's Note

Designed for server environments, this Samsung M393B2K70DB0-CMA is a 16GB DDR3-1866 Registered DIMM with ECC, delivering the data integrity and stability required for virtualization, in-memory databases, and mission-critical workloads. Its quad-rank x4 organization enables higher memory density per channel, while the registered signal type minimizes bus loading to maintain reliable operation across fully populated server platforms.

Technical Specs & Insights

1. ECC protection silently corrects single-bit errors and detects multi-bit corruption, delivering the data integrity essential for financial ledgers and mission-critical database transactions.
2. Registered buffering stabilizes signal integrity across fully populated memory channels, enabling dense server configurations to run round-the-clock without command-address glitches.
3. Quad Rank x4 organization packs more memory banks per channel, keeping throughput high and latencies predictable when hosting dozens of virtual machines on a single hypervisor.
4. Generous per-module capacity allows enterprises to scale in-memory workloads and large-scale virtualization without sacrificing valuable DIMM slots for future expansion.
5. High-throughput DDR3 speed grade accelerates data movement between CPU and memory, which directly benefits real-time analytics and high-concurrency user-facing services.

Why These Specs Matter

The M393B2K70DB0-CMA is a server-grade 16 GB DDR3-1866 Registered ECC RDIMM, purpose-built for enterprise platforms where reliability and throughput are non-negotiable. In a dense virtualization cluster hosting dozens of VMs per node, its ECC is critical: silent single-bit errors caused by cosmic rays or aging components can corrupt hypervisor memory, quietly destabilize guests, or flip financial data. This module detects and corrects those errors on the fly, preventing costly application crashes and data corruption without the IT team ever noticing an incident. The registered buffer is equally decisive—by re-driving address and command signals, it isolates the system bus from the module’s electrical load. This lets you fully populate all channels in a multi-socket server without signal degradation, directly sustaining memory-hungry workloads like large SQL databases or containerized microservices. The module’s Quad Rank x4 design enhances performance through rank interleaving: while one rank completes a refresh or burst, another can accept a new command, effectively hiding latency and maximizing bandwidth for in-memory analytics platforms such as Redis clusters. Combined with a 1866 MT/s transfer rate and CL13 latency, sequential read and write operations happen faster under heavy concurrent access. For you, this means confidently running more virtual machines per server, maintaining transactional integrity in your database tier, and accelerating real-time queries—all on a proven, stable memory foundation.

Endurance & Reliability

General Virtualization
For general virtualization hosts, balance memory capacity and cost by populating all memory channels symmetrically. With 16GB RDIMMs, a dual-socket server using 8 or 12 modules delivers 128GB to 192GB, providing ample headroom for dozens of mixed-workload VMs. One DIMM per channel is the sweet spot, preserving full memory bandwidth while leaving slots for future growth.

In-Memory Database
In-memory databases demand maximum capacity and fault tolerance. Deploy these Quad-Rank 16GB RDIMMs across all available channels—for example, 24 modules in a 2-socket system to reach 384GB. Quad-Rank DIMMs deliver deeper memory depth, but limit speed: expect operation at 1066MHz or 1333MHz when fully populated, so plan latency budgets carefully. Prioritize capacity over frequency to keep the entire dataset in RAM.

High-Performance Computing (HPC)
HPC workloads require sustained memory bandwidth and unwavering data integrity. Populate all channels with identical RDIMMs—typically one or two modules per channel—to achieve balanced interleaving. For a dual-socket node, a configuration of 16 modules (256GB) ensures maximum throughput per core. ECC and registered signaling are essential for long-running simulations, where even a single-bit error could invalidate results.

Verified Compatibility

Rigorously tested server memory, compatible with Dell PowerEdge R720, HP DL380p Gen8, and more.

FAQ