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| Product Type | Memory Module |
|---|---|
| Memory Capacity | 16 GB |
| Memory Technology | DDR4 |
| Product Voltage | 1.2V |
| RAM Speed | 2666MHz |
| RAM Standard | DDR4-2666/PC4-21300 |
| Error Identifying | ECC |
| Signal Type | Registered |
| Column Access Strobe (CAS) | CL19 |
| Rank | Single Rank x4 |
| Quantity of Pins | 288-pin |
| RAM Genre | RDIMM |
Designed for server platforms, this Samsung 16GB DDR4-2666 Registered DIMM with ECC ensures data integrity and system stability under heavy workloads like virtualization and in-memory databases. Its Single Rank x4 configuration on a 288-pin Registered architecture minimizes electrical loading on the memory bus, which improves signal integrity and enables higher population densities in multi-slot servers without sacrificing performance.
1. A 16 GB capacity per module enables higher VM density in virtualized environments, allowing more memory-intensive workloads to coexist on a single server node.
2. 2666 MHz memory speed delivers ample bandwidth for real-time analytics and in-memory databases, reducing data request queues under sustained load.
3. Integrated ECC protection silently corrects single-bit errors, vital for financial transactions and database integrity where data corruption is unacceptable.
4. Registered signal buffering stabilizes command and address lines when populating multiple DIMMs, ensuring reliable operation across fully loaded server memory channels.
5. Operating at just 1.2 V, this module contributes to lower data center power consumption and cooling overhead, directly improving TCO.
The M393A2K40CB2-CTD6Y is a server-grade DDR4 RDIMM purpose-built for the relentless demands of modern data centers. Its ECC diligently corrects single-bit errors, an absolute necessity for virtualized clusters where a flipped bit in memory can silently corrupt a financial transaction or bring down dozens of co-hosted virtual machines. The registered buffer stabilizes signal integrity when populating multiple DIMMs per channel, making high-density deployments reliable—this directly supports in-memory databases that rely on terabyte-scale capacity to keep real-time analytics responsive and transaction logs intact. A single-rank x4 organization strikes a critical balance: it reduces command overhead and enhances bandwidth efficiency, delivering consistently low latency for cache-heavy database queries and reducing contention when dozens of virtual drives compete for I/O. Operating at a frugal 1.2V, the module curbs power draw and heat in dense racks, slashing cooling expenses while sustaining 2666MHz throughput. In a virtualized SQL Server farm or a Redis cluster handling millions of concurrent sessions, these design choices are not mere specifications—they are your guarantee of uptime, data fidelity, and predictable performance under crushing workloads.
Capacity Planning Guide for RDIMM (DDR4-2666 ECC Registered)
This 16GB DDR4-2666 RDIMM with ECC and registered signaling is a server-class memory module, designed for stability and data integrity in multi-slot, high-capacity environments. Its registered architecture and single-rank x4 organization suit platforms requiring large memory populations. Below are configuration recommendations for typical server workloads.
General Virtualization
For mid-density virtualization hosts, populate six or eight identical modules across memory channels to enable balanced performance and NUMA optimization. A total of 96GB to 128GB using these 16GB RDIMMs comfortably supports 20–30 moderate VMs, leaving headroom for memory overcommit avoidance.
In-Memory Database
In-memory databases demand both capacity and low latency. Deploy a fully populated configuration—e.g., 12 or 16 modules—to achieve 192GB or 256GB, keeping datasets entirely in RAM. Ensure one DIMM per channel (1DPC) to maintain maximum 2666MT/s speed without throttling, preserving CL19 responsiveness for real-time analytics.
High-Performance Computing
HPC clusters benefit from channel balance and ECC reliability during long-running simulations. Populate all memory channels with identical 16GB RDIMMs for symmetric bandwidth, often targeting 128GB or 256GB per node. Single-rank x4 organization reduces electrical loading, helping sustain stable 2666MHz operation even in heavily loaded servers.
Rigorously tested server memory, compatible with Dell PowerEdge R740, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650.
Q: Can I mix this M393A2K40CB2-CTD6Y with other memory modules of different brands or speeds?
A: Mixing is strongly discouraged in server environments. Different brands, speeds, or ranks can cause stability issues and signal integrity degradation. We recommend populating channels with identical modules for validated interoperability and consistent performance.
Q: Is this memory compatible with my system?
A: This DDR4-2666 ECC Registered DIMM targets Intel Xeon Scalable and AMD EPYC platforms. Verify your server board supports 288-pin RDIMMs at 1.2V and 2666MHz. Always consult the manufacturer's Qualified Vendor List for specific model compatibility.
Q: What is the recommended DIMM population order for optimal performance?
A: Adhere to your server motherboard's memory population guide. Typically, install identical DIMMs in balanced configurations across memory channels, starting with the first slot of each channel. Symmetrical installation optimizes interleaving and maximizes memory bandwidth.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a JEDEC-compliant server module operating at 2666MHz. It does not support XMP or end-user overclocking, as enterprise platforms prioritize error-free stability over speculative performance gains. JEDEC latency values are fixed at CL19.
Q: What warranty and typical failure rate can I expect?
A: This module is covered by a one-year warranty. When operated within specifications, RDIMMs exhibit very low annualized failure rates, typically under 0.5%. Robust ECC further mitigates in-field data corruption risks, ensuring high reliability for critical workloads.