General

Engineer's Note

Designed for server environments, this Samsung M393A1G40DB0-CPB2Q 8GB DDR4-2133 RDIMM leverages ECC and registered signaling to ensure data integrity and signal stability in memory-intensive workloads such as virtualization and in-memory databases. Its single-rank x4 configuration with CL15 latency delivers consistent performance while minimizing electrical load on the memory bus, making it ideal for dense multi-DIMM server deployments.

Technical Specs & Insights

1. Registered signal type ensures robust signal integrity when populating multiple DIMMs per channel, enabling dense server configurations without compromising system stability.
2. ECC error correction silently detects and rectifies single-bit memory faults, preserving data integrity around the clock for mission-critical enterprise workloads.
3. Modest 8 GB capacity serves as a reliable building block for foundational infrastructure services, container hosts, and light virtualization without over-provisioning.
4. Single Rank x4 organization reduces electrical loading on the memory bus, allowing higher sustained speeds in fully loaded servers and improving overall data center power efficiency.
5. DDR4-2133 speed provides consistent bandwidth headroom that satisfies throughput demands of typical database queries, web serving, and mid-tier application processing.

Why These Specs Matter

The Samsung M393A1G40DB0-CPBQ2 is an 8GB DDR4-2133 registered DIMM engineered for enterprise servers, where four core capabilities directly translate into operational resilience. Its registered signal buffer preserves clean command and address signals when fully populating memory channels, allowing you to scale virtualization clusters to their maximum memory capacity without the instability that unregistered sticks inevitably introduce. Integrated ECC silently corrects single-bit errors in real time, a critical safeguard for in-memory databases like Redis or SAP HANA where an undetected bit flip could instantly corrupt millions of financial transactions. Operating at a low 1.2 volts, the module cuts energy and cooling expenditure across data center rows, making a measurable dent in total cost of ownership. Meanwhile, its single-rank x4 architecture delivers predictable, low-latency bandwidth under the chaotic concurrent access patterns of multi-tenant virtual machines, avoiding the rank-interleaving bottlenecks that can stall time-sensitive queries. For IT leaders who need uncompromising data integrity and dense, efficient compute, this RDIMM turns technical specifications into genuine business continuity.

Endurance & Reliability

Here is the capacity planning guidance for the provided memory module, which is clearly a server-class DDR4 8GB Registered ECC DIMM (RDIMM, PC4-17000, CL15, single-rank x4). The planning below covers typical server workloads.

General Virtualization
For a balanced hypervisor host running multiple VMs, target a minimum of 64 GB total capacity using eight identical 8 GB RDIMMs. Populating one DIMM per memory channel across both CPUs in a dual-socket server ensures consistent performance and full channel interleaving. This configuration provides sufficient headroom for moderate consolidation while taking advantage of ECC reliability.

In-Memory Database
In-memory databases demand both high capacity and low latency. To maximize usable memory, fully populate all DIMM slots in a balanced configuration — for example, 16 x 8 GB modules for 128 GB per server. The registered ECC design and CL15 latency offer stable, predictable access times, but overall capacity is critical; achieving 256 GB or more may require moving to higher-density RDIMMs if workload size grows significantly.

High-Performance Computing (HPC)
Memory bandwidth is often the primary bottleneck in HPC. Install one 8 GB DIMM per channel to maximize channel interleaving and sustain peak bandwidth on every socket. A typical dual-socket node can start with 8 or 12 modules (64–96 GB), which feeds most parallel simulation and modeling tasks efficiently. Always use identical part numbers across all sockets to preserve symmetric memory access and eliminate NUMA imbalances.

Verified Compatibility

Tested and proven: works in Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650 and similar DDR4 RDIMM servers.

FAQ