M393A2K40BB2-CTD Samsung 16GB DDR4 SDRAM 2666MHZ PC4-21300 Cl19 Ecc Reg RAM

Samsung M393A2K40BB2-CTD Memory Overview

The Samsung M393A2K40BB2-CTD belongs to a specialized category of enterprise-grade DDR4 server memory modules engineered for stability, scalability, and sustained performance in mission-critical computing environments. This category focuses on ECC Registered DIMMs designed specifically for servers, data centers, virtualization platforms, cloud infrastructure, and professional workstations that demand uninterrupted operation and precise data integrity. Unlike consumer desktop memory, RDIMM server memory emphasizes reliability under continuous workloads, controlled latency behavior, and compatibility with multi-processor architectures. Within this category, DDR4 RDIMM modules operate at lower voltages and higher densities to support modern server CPUs from Intel and AMD. The 288-pin RDIMM form factor defines physical and electrical characteristics that align with enterprise motherboard layouts, allowing system builders and IT architects to design scalable systems with predictable memory performance. Samsung’s implementation of this category is recognized globally for consistent quality, advanced semiconductor manufacturing, and strict validation standards.

DDR4 RDIMM

DDR4 Registered DIMMs introduce a register, or buffer, between the memory controller and the DRAM chips, reducing the electrical load on the controller. This architectural approach allows servers to populate more memory modules per channel without sacrificing signal integrity or stability. In high-density environments where memory capacity directly impacts performance, RDIMM architecture is essential. The Samsung M393A2K40BB2-CTD exemplifies this category by offering a balanced combination of capacity, speed, and signal reliability. As part of the DDR4 generation, it delivers higher bandwidth and improved power efficiency compared to DDR3-based server memory, making it a preferred choice for modern enterprise platforms. The category is especially relevant for dual-socket and multi-socket server configurations where memory scalability determines application responsiveness.

Error-Correcting Code

ECC, or Error-Correcting Code, is a defining characteristic of this server memory category. ECC memory can detect and correct single-bit memory errors in real time, preventing data corruption that could lead to system crashes, application failures, or silent data errors. In enterprise environments where uptime and data accuracy are paramount, ECC functionality is not optional but mandatory. The Samsung M393A2K40BB2-CTD integrates ECC at the hardware level, ensuring continuous protection during read and write operations. This makes the category suitable for databases, financial systems, scientific simulations, healthcare platforms, and virtualization hosts where even minor data inconsistencies can have significant consequences. ECC RDIMM memory enhances system resilience and supports compliance requirements in regulated industries.

Memory Speed

Operating at 2666MHz, this category of DDR4 server memory offers a data transfer rate of up to 21.3GB/s per module, aligning with PC4-21300 specifications. This speed tier represents a widely adopted standard across enterprise servers, providing a balance between performance and compatibility. Many server CPUs are optimized for 2666MHz memory, ensuring efficient utilization without excessive power consumption. The Samsung M393A2K40BB2-CTD supports consistent 2666MHz operation under sustained loads, making it ideal for environments running multiple virtual machines, in-memory databases, or large-scale analytics. The category prioritizes stable performance over aggressive overclocking, ensuring predictable behavior across all supported platforms.

CAS Latency

CAS latency CL19 is a standard timing specification within this memory category, reflecting a balance between speed and reliability. While consumer memory often advertises lower latency numbers, server memory prioritizes timing stability across large memory configurations. CL19 latency ensures that the module can operate reliably at 2666MHz while maintaining ECC functionality and register buffering. In enterprise scenarios, overall system performance depends more on memory bandwidth and capacity than marginal latency differences. The CL19 specification of this category supports consistent transaction processing, efficient multitasking, and smooth scaling as memory capacity increases. Samsung’s tuning of this latency aligns with server CPU memory controllers for optimal interoperability.

Single Rank

The single rank design of the Samsung M393A2K40BB2-CTD places it within a subcategory of RDIMM modules optimized for compatibility and predictable performance. Single rank memory modules present one set of memory chips to the controller at a time, simplifying signal routing and improving stability, particularly in densely populated systems. This design is advantageous in servers where memory slots are fully populated, as it reduces electrical complexity and helps maintain rated speeds across all modules. While dual rank modules offer higher density per DIMM, single rank modules often provide better scalability and easier configuration, making them suitable for balanced server builds. This category supports IT professionals who prioritize system reliability and ease of deployment.

Thermal Characteristics

Operating at 1.2 volts, this DDR4 server memory category emphasizes power efficiency and thermal management. Lower operating voltage compared to previous DDR generations reduces overall system power consumption, which is critical in data centers where energy costs and thermal output directly impact operating expenses. The Samsung M393A2K40BB2-CTD is designed to maintain stable operation at 1.2V under continuous load, contributing to lower heat generation and improved system longevity. Efficient thermal behavior allows servers to operate within optimal temperature ranges, reducing the need for aggressive cooling solutions and minimizing the risk of thermal throttling.

Data Center

In large-scale deployments, memory power consumption becomes a significant factor in total energy usage. This category supports green IT initiatives by reducing per-module power draw while delivering high performance. When multiplied across hundreds or thousands of servers, the efficiency gains from DDR4 1.2V RDIMM memory can be substantial. Energy-efficient memory also contributes to improved rack density and airflow management. By generating less heat, servers equipped with this category of memory can be packed more densely without compromising cooling efficiency, enabling data centers to maximize space utilization.

Compatibility

This DDR4 RDIMM memory category is designed to integrate seamlessly with modern server platforms from leading CPU manufacturers. Compatibility with Intel Xeon and AMD EPYC processors ensures broad applicability across a wide range of server models and workloads. The registered design and ECC support align with server motherboard requirements, enabling full utilization of available memory channels. System builders benefit from the category’s standardized specifications, which reduce the complexity of memory selection and configuration. By choosing a module like the Samsung M393A2K40BB2-CTD, organizations can ensure compliance with platform guidelines and achieve optimal performance without extensive tuning.

Use Cases

The Samsung M393A2K40BB2-CTD and its category serve a wide range of enterprise and professional use cases. In virtualization, reliable memory enables higher VM density and consistent performance across workloads. In database servers, ECC RDIMM memory supports data integrity and fast access to large datasets. High-performance computing workloads benefit from stable memory bandwidth and capacity, enabling complex simulations and analytics. Content creation and professional workstation environments also leverage this category for tasks that require large memory footprints and sustained reliability, such as 3D rendering, video processing, and scientific research.