General

Engineer's Note

Designed as a server-grade DDR4-2666 Registered ECC DIMM, this 16 GB module is ideally suited for virtualization hosts, in-memory databases, and data-integrity-critical workloads where silent data corruption is unacceptable. Its dual-rank x8 organization and registered signal topology enhance channel stability under heavy loading, while ECC with CL19 latency ensures error correction without compromising responsiveness in dense multi-DIMM deployments.

Technical Specs & Insights

1. ECC protection silently detects and corrects single-bit memory errors, safeguarding financial transactions and long-running database queries from silent data corruption that could otherwise crash critical services.
2. The registered clock driver buffers command and address signals, allowing a server board to populate all memory channels with multiple DIMMs while maintaining rock‑solid signal integrity for large‑scale virtualization deployments.
3. Dual rank x8 organization keeps the memory pipeline fed via rank interleaving, eliminating bandwidth stalls when a hypervisor simultaneously services hundreds of virtual machines under heavy consolidation.
4. A sixteen‑gigabyte module provides the granular capacity that lets datacenter operators cost‑effectively scale to hundreds of gigabytes per node, accommodating growing in‑memory databases and dense container fleets.
5. Operating at 2666 megatransfers per second, the module delivers consistent 21.3 GB/s peak bandwidth per channel, reducing transaction latency in real‑time analytics and high‑frequency trading platforms where every microsecond counts.

Why These Specs Matter

When you are running a virtualized cluster hosting dozens of VMs or an in-memory database like SAP HANA, the M393A2K43CB2-CTD is not just another RDIMM—it is the foundation of reliability and performance. This 16 GB DDR4-2666 module’s four defining characteristics directly address your most critical pain points. First, ECC error correction silently detects and corrects single-bit memory errors, preventing silent data corruption that could crash a transactional database or poison a virtual machine’s state during live migration. Second, the Registered signal buffer means the memory controller sees only one load per channel instead of dozens, so you can fully populate all DIMM slots without sacrificing signal integrity—essential when scaling to hundreds of gigabytes for dense virtualization. Third, the Dual Rank x8 organization interleaves access across two internal rank buses, boosting bandwidth by hiding row-cycle latency, which translates to noticeably faster query response times in memory-hungry analytics workloads. Finally, running at 1.2 V with CL19 latency, this module balances energy efficient operation with consistent 2666 MT/s throughput, keeping thermals in check across a 24/7 server farm while meeting the sustained data rates demanded by multi-threaded ERP systems. What this means for you is uncompromising uptime and workload capacity—because in the data center, memory integrity is business integrity, and every percentage point of performance gain extends the value of your infrastructure investment.

Endurance & Reliability

Server Memory Identification
This is a DDR4-2666 Registered ECC DIMM (RDIMM) with 16GB capacity and dual-rank x8 organization, designed exclusively for server and workstation platforms.

General Virtualization
Deploy eight identical 16GB RDIMMs across balanced memory channels (e.g., one DIMM per channel in a dual-socket system) to reach 128GB total. This configuration supports 30–50 moderate virtual machines by providing consistent performance, ECC protection, and ample headroom for memory overcommitment with common hypervisors.

In-Memory Database
Maximize capacity by installing 16 or more of these 16GB RDIMMs for a 256GB+ memory pool, ideally at two DIMMs per channel to leverage dual-rank interleaving. Low latency (CL19) and registered buffering stabilize heavy write/read workloads, enabling real-time analytics and fast cache operations without storage bottlenecks.

High-Performance Computing
For memory-bandwidth-sensitive HPC jobs, populate all channels symmetrically with one 16GB RDIMM per channel to deliver peak throughput and minimal NUMA effects. Scale to multiple nodes with 128–256GB each, using dual-rank x8 modules for enhanced bank-level parallelism and reliable ECC coverage during long-running simulations.

Verified Compatibility

Rigorously tested, compatible with Dell PowerEdge R740, R750, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.

FAQ