General

Engineer's Note

Designed for enterprise server platforms, this 128GB DDR4-2666 RDIMM with ECC and Octal Rank x4 architecture delivers exceptional memory density and data integrity for virtualization and in-memory database workloads. The Registered signal type combined with CL19 latency ensures stable operation across high-capacity memory channels, making it an ideal choice for mission-critical applications where reliability and large memory footprints are paramount.

Technical Specs & Insights

1. The massive per-module capacity empowers dense server configurations to host expansive in-memory databases and massive virtual machine fleets without resorting to slower storage offload.
2. ECC protection silently corrects single-bit memory errors, preserving transactional integrity in critical financial processing and eliminating silent data corruption risks.
3. Registered buffering isolates the memory controller from heavy electrical loads, enabling fully populated server boards to maintain rock-solid stability under continuous enterprise workloads.
4. The octal-rank organization keeps memory interleaving extremely efficient, maximizing per-channel data throughput for latency-sensitive multi-tenant virtualized environments.
5. Generous memory bandwidth ensures that multiple simultaneous real-time analytics queries and large-scale content delivery requests are served without throughput bottlenecks.

Why These Specs Matter

The Samsung M386AAK40B40-CWD6Q is a 128GB DDR4-2666 Registered ECC RDIMM. Its four key characteristics directly resolve data center pain points. First, ECC error correction detects and corrects single-bit errors, preventing silent corruption that could crash a virtualization host running dozens of VMs or distort in-memory database transactions. Second, the registered buffer stabilizes signal integrity, allowing reliable scaling to over 1.5TB per server without boot failures under load. Third, the octal-rank x4 design on a single 128GB module maximizes interleaving across memory channels, boosting throughput for latency-sensitive workloads like SAP HANA. This combination means your virtualized cluster achieves higher VM density with absolute data fidelity, while real-time analytics run faster with minimized downtime. For enterprise architects, it translates to uncompromised uptime and consistent performance at scale.

Endurance & Reliability

General Virtualization
This 128GB DDR4-2666 Registered ECC RDIMM is ideal for dense virtualization hosts. Populate a dual-socket server with one DIMM per channel (e.g., 8 modules for 1TB total) to maximize memory capacity while preserving balanced NUMA performance. The ECC and registered signaling guarantee data integrity under heavy multi-tenant VM workloads.

In-Memory Database
For in-memory databases like SAP HANA or Redis, this high-capacity octal-rank module enables massive dataset residency. Deploy six to twelve modules in a single server to scale beyond 1.5TB, using symmetric population across all memory controllers for optimal bandwidth. The CL19 latency at 2666MT/s ensures fast, reliable access to critical hot data with end-to-end error correction.

High Performance Computing
In HPC clusters, this module balances capacity with power efficiency at 1.2V. Configure nodes with one DIMM per channel (eight modules per dual-socket node for 1TB) to provide large memory footprints for simulation checkpoints while avoiding the speed penalties of fully populated channels. The registered ECC design maintains signal integrity across large-scale parallel jobs, reducing silent data corruption risks during multi-day computations.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ