General

Engineer's Note

This Samsung M393B2G70QH0-CK009 is a 16GB DDR3-1600 registered ECC RDIMM purpose-built for legacy server platforms, delivering the data integrity and stability required for memory-intensive workloads like virtualization and in-memory databases. Its dual-rank x4 organization and registered signaling enhance signal integrity under high-capacity configurations, while ECC reliably detects and corrects single-bit errors to prevent costly downtime.

Technical Specs & Insights

1. ECC memory actively corrects single-bit errors, preventing silent data corruption in transactional databases and financial processing that demand absolute integrity.
2. Registered signal buffering stabilizes command and address paths, allowing fully populated server boards to maintain reliable operation across all memory channels.
3. High-density capacity per module allows IT architects to maximize virtual machine density on a single node, improving consolidation ratios without sacrificing guest performance.
4. Dual Rank interleaving fully saturates the memory bus with parallel access, delivering consistent bandwidth that accelerates data-hungry workloads like in-memory analytics.
5. Elevated clock speed reduces data fetch latency, helping real-time decision support systems and caching layers respond faster under heavy user concurrency.

Why These Specs Matter

The M393B2G70QH0-CK009 is an RDIMM built for the server room, where downtime is not an option and data integrity is everything. Its four core characteristics directly address the pain points of IT architects managing virtualisation clusters and in-memory databases.

First, ECC technology actively detects and corrects single-bit memory errors. In a dense VMware or Hyper-V cluster hosting dozens of virtual machines, a flipped bit in active memory can corrupt a database index or silently crash a guest OS. ECC turns that from a weekly gamble into a non-issue, preserving transaction accuracy for financial records or customer data. Second, the registered signal buffer provides electrical stability at scale. When you populate all 24 DIMM slots per server, unbuffered modules would suffer signal degradation and fail to POST; the on-module register re-drives commands cleanly, enabling reliable 384 GB or larger footprints essential for large-scale virtual desktop infrastructure.

Third, dual-rank x4 organisation maximises bandwidth utilisation. A memory-bound application like SAP HANA or an in-memory analytics engine saturates the memory bus with concurrent reads and writes; dual rank allows the memory controller to interleave accesses, sustaining 12.8 GB/s throughput under heavy query loads rather than stalling. Fourth, the DDR3-1600 clock rate at CL11 delivers that bandwidth at a proven, power-efficient 1.5 V, keeping thermal profiles manageable inside dense rack enclosures. Together, these traits mean your database queries complete consistently, your VMs migrate without silent data corruption, and your server fleet runs stable under 24/7 pressure. It is not just a memory spec—it is a reliability foundation for business-critical workloads.

Endurance & Reliability

General Virtualization
For a consolidated virtualization host running 20–30 mixed-load VMs, install six to eight of these 16 GB RDIMMs per socket to reach 96–128 GB per CPU, populating at least one DIMM per channel across three or four memory channels. A balanced 2‑socket server with 12–16 modules (192–256 GB total) provides headroom for memory overcommitment and avoids NUMA imbalance. Always configure identical DIMM pairs on each socket to maintain symmetric multi‑channel access and maximize throughput.

In-Memory Database
In-memory databases like Redis or SAP HANA demand both capacity and data integrity. Use a fully populated 2‑socket system with 24 of these registered ECC DIMMs, delivering 384 GB, which is ideal for medium-sized datasets entirely held in RAM. Deploy modules in sets of three per channel when supported (tri-channel mode) to secure the highest bandwidth; otherwise, even distribution across eight channels ensures predictable low-latency access and strong error protection under constant write pressure.

High-Performance Computing
HPC clusters benefit from high memory bandwidth per core for simulation and modeling codes. For dual-socket compute nodes, install 16 modules (256 GB) organized as one DIMM per channel across eight channels—this configuration maximizes bandwidth while keeping capacity per core sufficient for large matrices. Avoid mixing dual‑rank x4 and single‑rank DIMMs; the uniform dual‑rank x4 population enables locked‑step channel operation at 1600 MT/s, reducing jitter during tightly coupled MPI workloads.

Verified Compatibility

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

FAQ