M393A4K40CB2-CTD6Y Samsung 2666MHz PC4-21300 ECC Registered DDR4 SDRAM

Highlights of Samsung M393A4K40CB2-CTD6Y 32GB DDR4 Ram

The Samsung M393A4K40CB2-CTD6Y 32GB DDR4 2666MHz RDIMM is a high-performance server memory module tailored for enterprise-grade servers and professional workstations. Featuring ECC (Error-Correcting Code) and registered buffering, this DDR4 SDRAM ensures reliable operation, superior data accuracy, and stable performance for intensive computing workloads.

General Information

• Manufacturer: Samsung
• Part Number: M393A4K40CB2-CTD6Y
• Product Type: Server Memory Module
• Sub Type: DDR4 2666MHz PC4-21300

Technical Specifications

• Total Capacity: 32GB
• Number of Modules: 1 x 32GB
• Rank Structure: Dual Rank x4
• Memory Speed: 2666MT/s
• Bus Speed: DDR4-2666
• Bandwidth Rating: PC4-21300
• CAS Latency: CL19
• Error Detection: ECC (Error-Correcting Code)
• Signal Processing: Registered (Buffered)
• Form Factor: 288-Pin RDIMM
• Memory Type: DDR4 SDRAM

Physical & Shipping Specifications

• Shipping Height: 1.00 inch
• Shipping Depth: 6.75 inches
• Shipping Weight: 0.20 lb

Compatibility

Supported System Types

• Enterprise rack and tower servers
• Data center and cloud infrastructure systems
• Professional workstations with ECC memory support
• Virtualization and database servers

Processor & Platform

• Intel Xeon server platforms
• AMD EPYC server processor systems
• Server chipsets supporting ECC and RDIMM architecture

Overview of Samsung M393A4K40CB2-CTD6Y DDR4 2666MHz

The Samsung M393A4K40CB2-CTD6Y 32GB DDR4 2666MHz PC4-21300 ECC Registered SDRAM 288-Pin RDIMM Memory Module is a premier example of enterprise-grade server memory. This category of memory is specifically designed for high-performance computing environments, data centers, and mission-critical server applications. It emphasizes reliability, stability, and scalability, ensuring that enterprise systems operate continuously with maximum uptime and data integrity. Modules in this category are optimized for virtualization, cloud computing, large-scale databases, and high-performance workloads where data accuracy and system reliability are non-negotiable.

Registered DIMM Architecture for Stability and Scalability

Registered DIMMs (RDIMMs) utilize a register that buffers command and address signals between the DRAM chips and the memory controller. This architecture significantly reduces electrical load on the memory controller, allowing servers to support larger memory capacities and more densely populated memory channels without compromising reliability. The Samsung M393A4K40CB2-CTD6Y is engineered with this architecture to provide superior signal integrity and predictable performance. In high-density and multi-socket servers, registered memory enables stable operation by minimizing timing errors and signal degradation.

32GB High-Capacity Memory for Enterprise Workloads

The 32GB memory capacity of the Samsung M393A4K40CB2-CTD6Y situates it in the high-density memory segment, essential for modern enterprise workloads. High-capacity modules allow servers to store larger datasets in memory, reduce reliance on slower storage-based operations, and accelerate performance for in-memory applications. This category supports virtualization, cloud computing, big data analytics, and enterprise databases, enabling organizations to achieve higher efficiency and better resource utilization. High-density memory modules also reduce the number of DIMMs needed to achieve a given total system memory capacity, improving airflow, lowering power consumption per gigabyte, and simplifying memory channel balancing.

Impact on Cloud Computing

Virtualized environments, including private, public, and hybrid cloud deployments, rely heavily on memory availability for virtual machines and containerized applications. The Samsung M393A4K40CB2-CTD6Y supports these environments by providing sufficient capacity per module to allow for high consolidation ratios and resource allocation efficiency. By enabling larger memory pools, servers can maintain multiple virtual instances without performance degradation or memory contention. In cloud infrastructures, high-capacity ECC registered modules ensure predictable performance under dynamic workloads.

DDR4 2666MHz PC4-21300 Performance Specifications

Operating at a data rate of 2666MHz, the Samsung M393A4K40CB2-CTD6Y conforms to the PC4-21300 specification, delivering a theoretical peak bandwidth of 21.3GB/s per module. This speed allows enterprise servers to efficiently handle memory-intensive tasks and improves overall system throughput. DDR4 technology introduces architectural enhancements over DDR3, including increased bank groups, enhanced prefetch mechanisms, and improved power efficiency, all of which contribute to higher performance and lower energy consumption. The 2666MHz frequency strikes a balance between speed and stability, providing sufficient bandwidth for large-scale databases, high-performance computing workloads, and multi-threaded enterprise applications.

CAS Latency CL19 and Timing Consistency

The CAS latency of CL19 indicates the number of clock cycles between a read command and the availability of data. In enterprise-grade memory, stability and predictability of timing are more critical than achieving the lowest possible latency. The Samsung M393A4K40CB2-CTD6Y delivers consistent timing performance, ensuring reliable operation across a wide range of workloads and system conditions. Stable latency is essential for servers running virtualization platforms, databases, analytics engines, and other memory-sensitive applications.

ECC Technology for Data Integrity

ECC is a defining feature of this memory category and critical for enterprise computing. The Samsung M393A4K40CB2-CTD6Y can detect and correct single-bit memory errors in real time, while flagging multi-bit errors, ensuring that data remains accurate and consistent. ECC protects against memory corruption caused by electrical interference, environmental factors, or component aging, reducing the risk of system crashes and data loss. In mission-critical applications such as financial computing, healthcare IT systems, scientific research, and large-scale databases, ECC functionality is essential.

Integration of ECC and Registered Buffering

The synergy between ECC and registered buffering enhances memory reliability. Registered buffering stabilizes electrical signals to the memory controller, while ECC provides real-time error correction. Together, these features allow enterprise servers to handle large-scale memory configurations and fully populate memory channels without risk of instability or data corruption. This integration makes the Samsung M393A4K40CB2-CTD6Y particularly suitable for high-availability servers, virtualized environments, and data-intensive workloads, providing a foundation for enterprise IT systems that require maximum uptime and operational reliability.

288-Pin RDIMM Form Factor

The 288-pin RDIMM form factor ensures mechanical and electrical compatibility with enterprise server motherboards designed for DDR4 registered memory. This form factor supports high-density memory configurations and improved signal integrity compared to unbuffered or load-reduced modules. The Samsung M393A4K40CB2-CTD6Y is compliant with JEDEC standards, ensuring broad compatibility across a variety of server platforms. RDIMM modules are favored in enterprise deployments for their ability to maintain stable operation under full memory population. Proper selection of RDIMM memory is critical for multi-channel server architectures to prevent timing errors and ensure reliable performance across all memory slots.

Multi-Channel and Multi-Socket

Enterprise processors often employ multi-channel memory controllers to maximize bandwidth and parallelism. The Samsung M393A4K40CB2-CTD6Y is optimized for these architectures, allowing balanced population of memory channels and higher throughput across workloads. Proper channel utilization reduces latency, minimizes bottlenecks, and enhances performance for memory-intensive applications such as virtualization, large-scale databases, and in-memory computing. In multi-socket server environments, registered memory ensures uniform signaling across CPUs, enabling higher total memory capacity while maintaining consistent performance.

Enterprise Deployments

Operating at a nominal voltage of 1.2V, the Samsung M393A4K40CB2-CTD6Y provides energy-efficient performance with reduced heat generation compared to previous generations. Efficient power consumption is vital in enterprise data centers where multiple high-capacity modules contribute significantly to total system power draw. Lower heat generation reduces cooling requirements and improves overall energy efficiency. Thermal stability ensures reliable operation under continuous workloads, preventing performance degradation or throttling in high-density server racks. Samsung’s manufacturing processes ensure uniform electrical and thermal characteristics across modules, enhancing reliability and prolonging operational lifespan in enterprise deployments.

Data Center Benefits of Memory

Energy-efficient memory contributes to lower operational costs, reduced cooling requirements, and improved sustainability in large-scale deployments. The Samsung M393A4K40CB2-CTD6Y delivers high capacity and performance with lower power draw, supporting modern data center objectives that prioritize efficiency, reliability, and environmental responsibility.

Samsung Manufacturing Expertise and Enterprise Validation

Samsung is a global leader in DRAM production, and the M393A4K40CB2-CTD6Y demonstrates the company’s commitment to quality, reliability, and innovation. Each module undergoes extensive testing to validate timing accuracy, voltage tolerance, thermal performance, and ECC functionality. This rigorous validation ensures the module performs reliably across diverse server platforms and enterprise workloads. Long-term product lifecycle management by Samsung ensures consistent specifications, availability, and support for enterprise customers. This stability is critical for organizations planning multi-year infrastructure deployments and high-availability systems that require predictable performance and minimal maintenance challenges.

Reliability and Longevity in Continuous Operation

Enterprise servers are often required to operate continuously without interruption. Samsung’s quality control and testing processes minimize early-life failures and ensure stable operation over extended periods. The M393A4K40CB2-CTD6Y is built to withstand demanding 24/7 workloads, making it an ideal choice for high-availability environments where downtime is costly and reliability is essential.

Enterprise Workload and Application

The Samsung M393A4K40CB2-CTD6Y 32GB DDR4 2666MHz PC4-21300 ECC Registered RDIMM memory module is optimized for a wide range of enterprise workloads. Application servers benefit from stable memory performance even under high concurrency, while database servers leverage the module’s capacity for caching, in-memory operations, and accelerated query execution. These capabilities reduce reliance on slower storage subsystems and improve overall system responsiveness. Storage controllers, file servers, and backup systems also benefit from reliable ECC RDIMM memory for metadata management, caching, and maintaining data integrity.

Cloud Environments

Cloud infrastructure, including private and hybrid deployments, demands memory solutions that can handle dynamic, high-intensity workloads. The 32GB capacity of this module provides flexibility in resource allocation, while ECC registered technology ensures stability and reliability. Multi-tenant environments, virtual machines, and containerized applications benefit from predictable memory performance, reducing the risk of bottlenecks and operational disruptions.

Strategic Role in Modern IT Architecture

Memory is a cornerstone of enterprise IT infrastructure, influencing performance, scalability, and reliability. The Samsung M393A4K40CB2-CTD6Y 32GB DDR4 2666MHz PC4-21300 ECC Registered RDIMM memory module exemplifies this category, offering high capacity, fast data transfer rates, error correction, and registered stability. Its adoption ensures robust performance for enterprise servers, optimized virtualization, and efficient handling of mission-critical workloads, making it an essential component in modern data center and enterprise IT deployments.