M393A2K43CB2-CTD Samsung 16GB 2666MHz DDR4 SDRAM Ecc Reg PC4-21300 Ram

Samsung M393A2K43CB2-CTD 16GB Memory

The Samsung M393A2K43CB2-CTD delivers reliable server-grade performance with advanced DDR4 SDRAM technology, ensuring stability and efficiency for enterprise workloads.

General Information

• Brand Name: Samsung
• Part Number: M393A2K43CB2-CTD
• Product Type: 16GB DDR4 SDRAM Registered Memory

Technical Specifications

• Storage Size: 16GB single module
• Memory Type: DDR4 SDRAM for enhanced bandwidth
• Speed Rating: 2666MT/s (PC4-21300)
• Latency: CL19 for balanced response times
• Rank Structure: 2Rx8 architecture for optimized throughput
• Error Correction: ECC support for data integrity
• Signal Handling: Registered design for server stability

Physical Characteristics

• Form Factor: 288-Pin RDIMM
• Voltage Requirement: 1.2V energy-efficient operation

Compatibility

• Designed for enterprise-class servers
• Supports mission-critical applications with consistent performance

Samsung 16GB 2666MHz DDR4 Memory Overview

The Samsung M393A2K43CB2-CTD belongs to a professional server memory category engineered around the DDR4 SDRAM standard, designed specifically for enterprise servers and data center platforms that demand sustained stability, deterministic latency behavior, and predictable throughput under continuous load. This category emphasizes memory architectures that align with modern multi-socket server CPUs, where memory controllers are optimized for registered dual in-line memory modules rather than unbuffered consumer-grade solutions. Within this segment, DDR4 RDIMM technology addresses the scaling challenges that arise when populating multiple memory channels per processor while maintaining signal integrity across densely populated motherboard layouts. DDR4 SDRAM operates with architectural enhancements over earlier generations, including bank group structures and improved prefetch mechanisms that allow higher effective data rates without proportionally increasing core clock frequency.

Registered DIMM

Registered DIMMs represent a defining characteristic of this memory category. The inclusion of a register between the DRAM chips and the memory controller reduces electrical load on the controller, enabling higher module counts per channel and improved reliability at scale. This design is essential in server platforms where maximum memory capacity and channel population are critical. The Samsung M393A2K43CB2-CTD exemplifies this approach by integrating a register that buffers address and command signals, thereby stabilizing timing margins across complex motherboard traces. This category of memory is not interchangeable with unbuffered DIMMs due to differences in signaling and platform requirements. Server chipsets and CPUs designed for RDIMM usage leverage the register to maintain consistent timing, which is especially important when operating at 2666MT/s data rates. The result is a memory environment that supports predictable performance even as total installed capacity increases, a necessity for enterprise environments that cannot tolerate intermittent faults or degraded throughput.

Error Correcting Code

ECC functionality is integral to the server memory category, and the Samsung M393A2K43CB2-CTD incorporates full error correcting code support. ECC memory detects and corrects single-bit errors while identifying multi-bit errors, significantly reducing the risk of data corruption caused by transient electrical interference or cosmic radiation. In mission-critical applications, such protection is not optional but foundational to system reliability. ECC operation works in conjunction with the memory controller and system firmware to ensure that corrected errors are logged and monitored. This allows administrators to identify degrading modules before failures occur. The category places a strong emphasis on long-term data integrity, particularly for workloads such as financial transactions, scientific simulations, and persistent in-memory databases where silent data corruption could have severe consequences.

2Rx8

The 2Rx8 rank organization defines how memory chips are arranged and accessed within the module. Dual-rank configurations effectively present two logical memory ranks to the controller, allowing for interleaving that can improve throughput in multi-threaded workloads. The x8 chip width aligns with ECC requirements, as additional bits are allocated for parity and correction without compromising usable capacity. This category benefits from the balance that 2Rx8 modules strike between capacity, performance, and compatibility. Many server platforms are optimized to achieve optimal channel utilization with dual-rank RDIMMs, making them a common choice for balanced configurations that prioritize both memory density and access efficiency.

Performance

Operating at 2666 mega transfers per second, this server memory category addresses a performance tier that is widely supported across multiple generations of server processors. The PC4-21300 designation reflects the theoretical peak bandwidth available per module, which is critical for applications that stream large datasets or perform frequent memory access operations. Latency characteristics such as CAS latency 19 are tuned to meet JEDEC standards, ensuring compatibility and predictable timing behavior.

Thermal Design

The 1.2-volt operating voltage of DDR4 represents a significant efficiency improvement over earlier memory generations. Within this category, reduced voltage translates into lower power consumption per gigabyte, which scales favorably in high-density server configurations. Thermal output is minimized, allowing data centers to manage heat more effectively and reduce cooling overhead. Thermal characteristics are further managed through strict manufacturing tolerances and validation processes. Modules such as the Samsung M393A2K43CB2-CTD are designed to operate reliably in environments with constrained airflow, typical of densely packed server racks. This ensures that performance remains stable even during sustained periods of high utilization.

288-Pin RDIMM

The 288-pin RDIMM form factor defines physical and electrical compatibility within the server memory ecosystem. This category adheres strictly to JEDEC standards for pin layout and signaling, ensuring interoperability with a wide range of server motherboards and CPU platforms that support DDR4 RDIMM modules. Mechanical keying prevents incorrect installation, reinforcing system integrity. Form factor consistency allows system integrators and administrators to plan memory upgrades and replacements with confidence.

Reliability

Reliability is a cornerstone of this server memory category. Modules undergo extensive testing, including stress testing across voltage and temperature extremes, signal integrity verification, and long-duration burn-in processes. These measures ensure that memory operates within specification throughout its service life, even under continuous load conditions. Samsung’s manufacturing processes for server memory emphasize consistency and traceability. Each module is produced using carefully selected DRAM components and assembled under controlled conditions. This approach minimizes variance between units, which is essential for large-scale deployments where uniform behavior across hundreds or thousands of modules is expected.

Workload

This category of server memory is optimized for a broad range of enterprise workloads. Virtualization platforms benefit from ECC protection and dual-rank performance characteristics, enabling stable operation of multiple virtual machines. Database servers rely on predictable latency and error correction to maintain transaction integrity and performance under heavy query loads. In high-performance computing environments, DDR4 RDIMM modules provide the bandwidth and reliability needed for parallel processing tasks. While not designed for extreme overclocking, their strength lies in sustained performance and fault tolerance, which are more valuable in production environments than peak benchmark results.

Integration

Compatibility with modern server CPUs is a defining feature of this memory category. Integrated memory controllers in contemporary processors are designed to leverage the benefits of registered ECC memory, including higher supported capacities and improved channel stability. The Samsung M393A2K43CB2-CTD aligns with these design goals, supporting configurations that maximize memory per socket. Proper population rules and channel balancing are essential to achieving optimal performance.

Scalability

Scalability is a key advantage of DDR4 RDIMM server memory. Systems can be initially deployed with moderate capacity and later expanded by adding additional modules without sacrificing stability. The registered design supports higher DIMM counts per channel, enabling gradual upgrades as workload demands grow. This category supports mixed-capacity configurations within platform guidelines, allowing organizations to optimize memory investment over time. Careful planning ensures that performance characteristics remain balanced as capacity increases.