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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 enterprise server platforms, this 16GB DDR4-2666 RDIMM with ECC and registered signal technology ensures robust data integrity and system stability, making it ideal for virtualization, in-memory databases, and mission-critical workloads that demand reliable error correction and high signal quality on densely populated motherboards. The single-rank x4 configuration reduces electrical loading to maintain low latency at CL19 while maximizing memory bandwidth, directly benefiting multi-DIMM setups in rack and tower servers.
1. Registered signal type buffers the command and address lines, allowing a single server channel to support more DIMMs without compromising signal integrity—essential for scaling up memory in dense virtualization platforms.
2. ECC protection silently detects and corrects single-bit errors in real time, safeguarding transactional databases and in-memory workloads against silent data corruption.
3. Single Rank x4 organization reduces electrical loading and access latency, improving memory efficiency for latency-sensitive enterprise applications deployed in 1DPC configurations.
4. The 16-gigabyte capacity per module strikes a high-density sweet spot for cloud hosts, enabling heavier VM consolidation without exhausting limited DIMM slots.
5. This 2666 MT/s transfer rate paired with CL19 delivers predictable bandwidth for steady-state data center throughput, balancing performance with the low power draw critical in rack-scale deployments.
The M393A2K40CB2-CTD8Q is a server DDR4 Registered DIMM with ECC, built for data centers. Its four key attributes—ECC error correction, registered buffering, 2666MHz bandwidth, and 1.2V efficiency—directly tackle real-world risks. In virtualized clusters, the register stabilizes signals when populating all slots, letting you deploy 16GB modules across channels without degradation, so each VM performs predictably. The Single Rank x4 at PC4-21300 accelerates data access, eliminating bottlenecks for data-hungry workloads. For an in-memory database like SAP HANA, ECC acts as a silent guardian, correcting single-bit errors on-the-fly to prevent silent corruption that could crash transactions or distort analytics. That ensures data integrity and non-stop availability. Meanwhile, 1.2V operation slashes power and cooling costs across your server fleet, directly lowering TCO. This is reliability engineered for your mission-critical infrastructure.
General Virtualization
For dense VM hosts, populate at least six to eight of these 16 GB RDIMMs to reach 96–128 GB per socket, preserving balanced memory channels. Favor a symmetrical configuration—one DIMM per channel—to maintain uniform latency and full bandwidth, which is critical when oversubscribing vCPUs.
In-Memory Database
Maximize capacity with fully populated channels using the largest supported RDIMM count, typically 16 or more of these modules, to keep entire datasets in DRAM. The ECC and registered buffer ensure data integrity and signal stability under continuous, high-throughput transactional loads, lowering the risk of silent corruption.
High-Performance Computing
Deploy modules in a one-DIMM-per-channel arrangement across all available memory channels to deliver peak bandwidth for bandwidth-bound simulations. A starting configuration of 128 GB (8×16 GB) per node suits most parallel workloads, while scaling to 256 GB or higher enables larger problem meshes without swapping.
Rigorously tested server memory, compatible with Dell PowerEdge R760, HPE ProLiant DL380 Gen10, Lenovo ThinkSystem SR650, and more.
Q: Can I mix this M393A2K40CB2-CTD8Q with other memory modules of different brands or speeds?
A: Mixing different brands or speeds is strongly discouraged for RDIMMs. It risks signal timing conflicts and can lead to system instability. Uniform modules ensure guaranteed ECC integrity and validated performance.
Q: Is this memory compatible with my system?
A: It is compatible with servers supporting DDR4-2666 ECC Registered DIMMs, such as Intel Xeon Scalable and AMD EPYC platforms. Always verify your server’s Qualified Vendor List for this specific 16GB RDIMM.
Q: What is the recommended DIMM population order for optimal performance?
A: Populate DIMMs per your server board manual: typically fill the farthest slot from the CPU in each channel first. Balanced channel loading with identical kits optimizes memory bandwidth and ensures signal integrity.
Q: Does this module support overclocking or XMP profiles?
A: No. This is a JEDEC-compliant DDR4-2666 module designed for server reliability. It does not support XMP or overclocking; it operates at fixed 2666MHz with CL19 timings for 24/7 stability.
Q: What warranty and typical failure rate can I expect?
A: This module comes with a one-year warranty. As an enterprise-grade Samsung RDIMM with rigorous screening, it exhibits an extremely low annualized failure rate, typically below 0.5% under specified conditions.