General

Engineer's Note

Designed for server environments, this Samsung M393A2G40EB2-CTD7Q 16 GB DDR4-2666 RDIMM leverages dual-rank x4 organization and ECC to ensure high data integrity and stable operation under heavy memory access patterns. Its registered signal type and CL19 latency make it ideal for memory-intensive workloads like virtualization, in-memory databases, and enterprise applications that demand reliable throughput and fault tolerance.

Technical Specs & Insights

1. Dense capacity per module enables higher virtualization density, allowing servers to host more virtual machines and containers without sacrificing performance.
2. End-to-end error correction eliminates silent data corruption, delivering the data integrity required for financial transactions and database processing.
3. Registered signal architecture preserves command and address integrity across fully loaded memory channels, ensuring stable operation in multi-slot server platforms.
4. Dual-rank organization boosts interleaving efficiency, keeping memory bandwidth fully saturated and latency low during heavy consolidation workloads.
5. Elevated memory bandwidth accelerates in-memory analytics and real-time data processing, reducing response times for latency-sensitive enterprise applications.

Why These Specs Matter

The M393A2G40EB2-CTD7Q is a server-class DDR4 Registered DIMM, and its defining characteristics—ECC error correction, registered signaling, dual-rank organization, and 1.2V low-voltage operation—directly answer the real-world pressures of enterprise computing. When you run a virtualized cluster hosting dozens of VMs, a single undetected bit flip in DRAM can silently corrupt a database page or hypervisor state. The integrated ECC engine actively detects and corrects single-bit errors, preserving data integrity without performance interrupts, which is non-negotiable for financial ledgers or patient records.

The registered clock driver buffers command and address lines, stabilizing signal integrity when all memory channels are populated—essential for scaling to hundreds of gigabytes in a virtualization host or an in-memory database like Redis or SAP HANA. Meanwhile, the dual-rank x4 architecture interleaves internal banks, elevating sustained bandwidth and reducing access latency for massive concurrent queries. Combined with 2666 MT/s at just 1.2V, the module delivers this throughput while keeping thermal load low in dense 1U/2U servers. For your infrastructure, that means fewer cooling concerns, tighter service-level agreements, and a platform that can confidently consolidate heavy workloads without compromising stability.

Endurance & Reliability

General Virtualization
For consolidated virtual machine workloads, populate a dual-socket server with eight identical 16 GB RDIMMs (128 GB total, one DIMM per channel). This balanced configuration sustains moderate memory overcommitment while delivering uniform access latency. ECC and registered signaling ensure stability across dozens of mixed-role VMs.

In-Memory Database
Deploy sixteen or more modules (≥256 GB) to hold entire datasets in RAM for platforms like Redis or SAP HANA. The dual-rank, x4 organization provides bank-level parallelism that accelerates random access. Fully populating channels with registered ECC DIMMs safeguards transactional integrity against soft errors under heavy write loads.

High-Performance Computing (HPC)
Bandwidth-sensitive simulations favor eight identical 16 GB RDIMMs arranged one per channel to fully exploit the 2666 MT/s bus. Dual-rank modules offer higher sustained throughput than single-rank alternatives, while ECC prevents silent data corruption during multi-day runs, preserving result accuracy without checkpoint overhead.

Verified Compatibility

Rigorously tested, this DDR4 RDIMM is compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.

FAQ