General

Engineer's Note

The M393A1K43BB0-CPB is an 8GB DDR4-2133 registered ECC RDIMM designed for server platforms, where its error-correcting code and registered signal type ensure data integrity and stable operation under heavy, concurrent memory loads. Its single-rank x8 organization helps maintain low latency (CL15) while minimizing electrical loading on the memory bus, making it particularly well-suited for memory-intensive virtualization and in-memory database workloads that demand consistent reliability and efficiency.

Technical Specs & Insights

1. As a Registered DIMM, this module ensures reliable operation under the high memory loads typical of virtualized data centers, maintaining signal integrity across multiple ranks and channels.
2. Integrated Error Correcting Code actively scrubs single-bit errors, delivering the rock-solid data protection demanded by financial databases and mission-critical enterprise applications.
3. The registered signal type buffers the command and address buses, enabling the massive memory populations required for high-density server virtualization without sacrificing stability.
4. A single-rank x8 organization minimizes memory access latency and power draw per DIMM, offering a precise balance of responsiveness for latency-sensitive workloads like in-memory caching.
5. Operating at a mere 1.2 volts, it cuts server energy consumption and cooling overhead, directly lowering total cost of ownership in large-scale cloud deployments.

Why These Specs Matter

For enterprise-class deployments, the Samsung M393A1K43BB0-CPB—an 8GB DDR4-2133 Registered ECC RDIMM—defends against subtle threats that commoditized memory cannot. Its Error-Correcting Code (ECC) is your first line of defense against silent data corruption: in a virtualized cluster hosting dozens of VMs, a single cosmic-ray-induced bit flip inside a hypervisor’s memory space can crash an entire business service or fork a database replica into inconsistency. ECC detects and corrects such errors in real time, turning statistical risk into transaction-level certainty. The Registered signal type adds a second layer of resilience by using an on-DIMM register to buffer the command and address bus. When you populate a server with multiple RDIMMs—common in dense virtualization or in-memory database nodes like SAP HANA or Redis—this buffering dramatically reduces electrical loading on the CPU’s memory controller, preserving signal integrity and allowing the system to sustain stable high-speed operation under full slot load without throttling. Equally critical is the 1.2V operating voltage. Across a farm of hundreds of servers, the step from 1.5V DDR3 to 1.2V DDR4 lowers thermal dissipation directly at the module, which compounds into reduced cooling overhead and a measurably lower power bill—a silent but continuous contributor to total cost of ownership. Finally, the single-rank x8 organization with CL15 latency strikes the optimal balance for scale-out workloads. In a memory database that demands aggressively low latency on large working sets, single-rank DIMMs enable faster row-cycle timings and more predictable interleaving than dual-rank modules, accelerating the countless tiny random accesses that define real-time analytics. Every design choice here converges on a single promise: unwavering uptime and deterministic performance for the workloads that demand it most.

Endurance & Reliability

General Virtualization
For a balanced virtualization host, deploy this 8 GB RDIMM in multiples of eight across both memory channels of a dual-socket server to reach 64 GB total. Registered ECC ensures stability for dozens of lightweight VMs, and the 2133 MT/s speed is adequate when density takes priority over raw frequency. Add modules symmetrically per CPU to preserve NUMA performance.

In-Memory Database
Maximize capacity to keep entire datasets in RAM by fully populating all DIMM slots—aim for 16 or more modules (128 GB minimum). The module’s ECC and registered signal type deliver the data integrity and signal cleanliness required for constant write-intensive caching. Latency-sensitive workloads benefit from single-rank x8 organization, offering a balanced trade-off between rank interleaving and command overhead.

High-Performance Computing
Per compute node, install 8 to 16 units (64–128 GB) to feed high-core-count processors with ample memory bandwidth. The registered DIMM design permits stable multi-module operation under sustained floating-point loads. In clusters where memory throughput bottlenecks simulations, populate one DIMM per channel to maintain full bus speed and minimize DRAM latency.

Verified Compatibility

Rigorously tested, this 8GB DDR4-2133 ECC RDIMM is validated for Dell PowerEdge R730, HPE ProLiant DL380 Gen9, and Lenovo ThinkSystem SR530 servers.

FAQ