General

Engineer's Note

This is a server-class DDR4 RDIMM with ECC and a registered signal type, ideally suited for virtualization hosts, in-memory databases, and mission-critical enterprise workloads where data integrity is non-negotiable. Its dual-rank x4 configuration boosts bank-level parallelism for sustained throughput, while the CL19 latency and 1.2V efficiency help maintain stable performance under heavy, long-duration loads.

Technical Specs & Insights

1. Registered signal type buffers command and address lines, enabling fully loaded memory channels without signal degradation, a must for hyperscale servers demanding massive RAM footprints and unwavering uptime.
2. ECC error correction actively hunts and resolves single-bit faults in real time, preventing silent data corruption that could otherwise crash transactional databases or compromise financial integrity.
3. Dual Rank x4 organization interleaves memory banks to extract more bandwidth per channel, directly boosting virtual machine density and responsiveness in consolidation-heavy data centers.
4. 16GB capacity per module delivers an ideal balance of density and cost, allowing IT architects to equip servers with enough headroom for container orchestration and memory-hungry middleware without overspending.
5. 2666MHz operation with PC4-21300 peak throughput supplies a reliable 21.3 GB/s per channel, sustaining smooth real-time analytics and reducing CPU idle cycles under concurrent query loads.

Why These Specs Matter

In a data center, memory is more than a simple component—it is the bedrock of reliability, scalability, and real-time performance. The Samsung M393A2G40EB1-CTD, a 16GB DDR4-2666 Registered DIMM with ECC, directly addresses the non-negotiable demands of enterprise servers. Its ECC technology means every single bit is actively corrected in the background, preventing silent data corruption that could crash a virtualized cluster running dozens of critical VMs or introduce errors into a customer-facing financial database. The registered buffer on this module stabilizes the command and address signals, allowing your server to support fully populated memory channels with 24 or more DIMMs without signal degradation—this translates directly to the massive footprint required for large-scale virtualization hosts and in-memory databases like SAP HANA or Redis. Meanwhile, the dual-rank x4 organization enables memory interleaving, keeping data pipelines saturated so that multiple virtual machines and database queries operate smoothly in parallel, reducing latency spikes during peak loads. Finally, the 1.2V operating voltage curbs power draw across a fleet of servers, lowering cooling costs and total cost of ownership without sacrificing the 2666MT/s throughput that keeps your analytics engines fed. For every IT infrastructure manager, these four attributes mean peace of mind—the difference between scheduled uptime and a 3 A.M. emergency.

Endurance & Reliability

General Virtualization
This Samsung M393A2G40EB1-CTD is a 16GB DDR4-2666 Registered ECC RDIMM, ideal for virtualized environments. A typical dual-socket server with 8 or 16 memory channels can run dozens of lightweight VMs comfortably with 8 modules (128GB) or 16 modules (256GB) in a balanced population. ECC and registered signaling ensure data integrity and stability when hosting multiple tenants on a single physical host.

In-Memory Database
For in-memory databases like Redis or SAP HANA, capacity and reliability are paramount. Populate all available channels with these 16GB RDIMMs to maximize density while maintaining interleaved performance; a 16-module configuration delivers 256GB of fault-tolerant memory. The ECC protection prevents silent data corruption, a critical requirement for transactional and analytical workloads where every bit counts.

High-Performance Computing
In HPC clusters, memory bandwidth often governs node-level throughput. Use one dual-rank module per channel to achieve full memory speed and leverage all eight or twelve channels on modern server platforms. A 128GB to 256GB pool built from 8 to 16 sticks balances capacity per core for simulation, modeling, and large-scale parallel tasks, while registered architecture permits the stable signal integrity needed under sustained, intense load.

Verified Compatibility

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

FAQ