General

Engineer's Note

The Samsung M393A1G40EB2-CTD60 is a server-class DDR4-2666 Registered DIMM with ECC, purpose-built for memory-intensive workloads such as virtualization, in-memory databases, and enterprise data integrity applications. Its single-rank x4 organization and Registered signal buffering enhance signal stability and reduce electrical loading on the memory bus, enabling higher memory density per channel while maintaining reliable operation at CL19 latency.

Technical Specs & Insights

1. ECC protection corrects single-bit errors and detects multi-bit faults in real time, safeguarding transactional data integrity in financial and database servers where even silent corruption is unacceptable.
2. Registered signal buffering stabilizes high-density memory configurations by isolating the memory controller from excessive electrical loading, ensuring reliable operation across fully populated server nodes.
3. Single Rank x4 organization delivers streamlined bank access and predictable latency, which directly translates to consistent virtual machine responsiveness under mixed-workload consolidation.
4. The PC4-21300 bandwidth ceiling of 21.3 GB/s satisfies the concurrent throughput demands of in-memory analytics and content caching without stalling modern multi-core server CPUs.
5. 1.2 V ultra-low operating voltage curbs overall datacenter power draw and waste heat per DIMM, lowering cooling overhead in dense rack deployments while preserving long-term component longevity.

Why These Specs Matter

In today’s data centers, where a single undetected bit error can corrupt a financial transaction or crash a virtual machine, the Samsung M393A1G40EB2-CTD60 RDIMM is engineered to eliminate that risk. Its ECC circuitry actively detects and corrects single-bit flips, ensuring computational integrity for memory-intensive databases like Redis or SAP HANA, where silent data corruption could otherwise cascade into revenue-impacting outages. The registered signal buffer decouples the memory bus from the DRAM loads, allowing you to populate all memory channels with stable, high-capacity configurations—critical for dense virtualization clusters hosting dozens of VMs without signal degradation. Running at 2666MHz with a 1.2V operating voltage, this module slashes power consumption per transaction, directly lowering your cooling overhead and electricity bill in always-on, rack-scale deployments. The single-rank x4 organization is optimized for one DIMM per channel, delivering the lowest latency and highest bandwidth in balanced server builds, making it an ideal building block for hyperconverged infrastructure where predictable performance under heavy multi-tenant workloads matters most.

Endurance & Reliability

General Virtualization
In virtualized environments, reliability and moderate capacity are key. For a typical dual-socket server, populate all memory channels evenly with one 8GB RDIMM per channel—often 12 or 16 modules—to achieve 96 GB or 128 GB. This balanced configuration maximizes memory interleaving and supports numerous VMs without creating bottlenecks.

In-Memory Database
In-memory databases demand maximum capacity and low latency. To meet these needs, fully populate all available DIMM slots with these 8GB modules, potentially using two modules per channel if the platform allows. A 24-slot server can provide 192 GB, ensuring large datasets reside entirely in RAM. Accept a minor speed drop at 2DPC if necessary to prioritize capacity.

High-Performance Computing (HPC)
HPC workloads require high sustained memory bandwidth. Install exactly one 8GB RDIMM per memory channel to avoid speed reduction, keeping the modules at 2666 MHz. A typical node with 8 or 12 channels can deliver 64–96 GB, striking a balance between capacity and the peak throughput required for simulation and modeling tasks.

Verified Compatibility

Validated for server compatibility with Dell PowerEdge R750, HPE ProLiant DL380 Gen10 Plus, Lenovo ThinkSystem SR650 V2.

FAQ