M393A4K40CB2-CTD Samsung 32GB DDR4 2666MHZ SDRAM PC4-21300 Cl19 Registered

Highlights of Samsung M393A4K40CB2-CTD 32GB DDR4 ECC Ram

The Samsung M393A4K40CB2-CTD 32GB DDR4 2666MHz RDIMM is a high-performance server memory module designed for enterprise servers and professional workstations. Featuring ECC (Error-Correcting Code) and registered buffering, this DDR4 SDRAM delivers stable operation, enhanced data reliability, and consistent performance for demanding workloads and mission-critical applications.

General Information

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

Technical Specifications

• Total Capacity: 32GB
• Module Quantity: 1 x 32GB
• Rank Structure: Dual Rank x4
• Memory Speed: 2666MT/s
• Bus Speed: DDR4-2666
• Bandwidth Rating: PC4-21300
• CAS Latency: CL19
• Error Checking: ECC (Error-Correcting Code)
• Signal Processing: Registered (Buffered)
• System Stability: Minimized memory-related errors
• 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 support
• Virtualization servers and database servers

Processor & Platform

• Intel Xeon server platforms
• AMD EPYC server processor systems
• Server chipsets with ECC and RDIMM support

Overview of Samsung M393A4K40CB2-CTD DDR4 ECC RDIMM

The Samsung M393A4K40CB2-CTD 32GB DDR4 2666MHz PC4-21300 SDRAM CL19 Registered ECC RDIMM 288-Pin RAM is a premium example of enterprise-grade server memory designed for high-performance computing environments. This category of memory modules targets data centers, cloud infrastructures, virtualization platforms, and mission-critical server workloads, where performance, reliability, and stability are essential. These modules deliver a combination of high capacity, fast data rates, error correction, and registered architecture to meet the stringent requirements of modern enterprise servers.

Registered DIMM Architecture for Server Stability

The registered memory architecture found in the Samsung M393A4K40CB2-CTD includes a register that buffers the command and address signals between the memory controller and DRAM chips. By reducing the electrical load on the memory controller, this architecture ensures that signals remain stable even when multiple modules are installed across all memory channels. This design is critical for servers that require large memory capacities and high reliability in multi-socket and high-density configurations.

High-Density 32GB Capacity

The 32GB capacity of the Samsung M393A4K40CB2-CTD positions it as a high-density memory module suitable for demanding enterprise workloads. High-capacity modules allow servers to store larger datasets in memory, reduce reliance on slower disk-based storage, and accelerate performance for data-intensive applications. This category of memory is particularly advantageous for virtualization, database management, cloud computing, and high-performance computing environments. By consolidating memory into fewer modules, system architects can optimize memory channel population, improve airflow within server chassis, and reduce power consumption per gigabyte.

Impact on Cloud Infrastructures

Virtualized environments, including private and hybrid cloud infrastructures, benefit greatly from high-capacity memory modules. The Samsung M393A4K40CB2-CTD enables servers to host multiple virtual machines or containers with sufficient memory allocation for each workload. This minimizes memory contention, reduces latency, and improves application performance, ensuring predictable and stable operation for end users. Cloud service providers and enterprise IT teams can achieve higher consolidation ratios, reducing the number of physical servers required to support workloads.

DDR4 2666MHz PC4-21300 Performance

Operating at 2666MHz, the Samsung M393A4K40CB2-CTD delivers high-speed data transfer and improved performance compared to earlier DDR4 modules with lower frequencies. The PC4-21300 designation indicates a theoretical peak bandwidth of 21.3GB/s per module, providing ample throughput for enterprise applications. This memory speed ensures efficient handling of data-intensive workloads, including databases, virtualization hosts, analytics engines, and high-performance computing tasks. The DDR4 standard offers architectural improvements over DDR3, such as increased bank groups, larger prefetch buffers, and reduced operating voltage.

CAS Latency CL19 and Timing

The CL19 CAS latency rating indicates the module’s timing between the issuance of a read command and the availability of data. In enterprise environments, timing stability and predictability are often more important than achieving ultra-low latency. The CL19 specification provides consistent and reliable performance across a variety of workloads and operating conditions, supporting multi-threaded and multi-user applications effectively. Stable latency is critical for servers running databases, enterprise applications, virtualization, and cloud workloads, where memory access patterns must remain predictable to avoid performance bottlenecks.

ECC Technology

Error Correcting Code (ECC) is a core feature of the Samsung M393A4K40CB2-CTD and defines its category within enterprise server memory. ECC detects and corrects single-bit errors in real time while identifying multi-bit errors, providing a crucial safeguard for data integrity. This technology prevents silent data corruption, reduces system crashes, and supports long-term reliability in critical server environments. Memory errors can arise from electrical interference, environmental factors, or cosmic radiation. ECC functionality ensures that these errors do not propagate into applications, databases, or virtual machines, maintaining operational stability.

Synergy of ECC and Registered Buffering

The combination of ECC and registered buffering amplifies the benefits of each feature, resulting in memory modules that are highly stable and reliable. Registered buffering improves electrical signal integrity, while ECC maintains data correctness. Together, they allow servers to handle large memory configurations, multi-channel setups, and high-density deployments without compromising stability or accuracy. This synergy is essential in enterprise environments, ensuring that memory-related errors do not disrupt operations or affect data reliability. The Samsung M393A4K40CB2-CTD is an exemplary module in this category, providing a foundation for high-availability computing and consistent performance in demanding applications.

288-Pin RDIMM Form Factor

The 288-pin RDIMM form factor of the Samsung M393A4K40CB2-CTD is standardized for DDR4 registered memory, ensuring mechanical and electrical compatibility with enterprise server motherboards. This form factor supports higher memory densities and improved signaling compared to unbuffered or load-reduced modules. The module’s design adheres to JEDEC specifications, facilitating seamless integration into a wide range of server platforms. RDIMM modules are preferred in professional server deployments for their ability to maintain stability across densely populated memory channels. Proper selection of RDIMM modules is critical to achieving reliable performance and avoiding electrical or timing conflicts in high-performance enterprise systems.

Multi-Channel and Multi-Socket Server

Modern enterprise processors utilize multi-channel memory controllers to maximize bandwidth and parallelism. The Samsung M393A4K40CB2-CTD is optimized for these architectures, enabling balanced population of memory channels and higher throughput across workloads. Proper channel population minimizes latency, reduces bottlenecks, and enhances performance for memory-intensive applications. In multi-socket servers, registered memory ensures uniform electrical signaling and consistent performance across all CPU sockets. This capability is essential for high-capacity enterprise deployments, enabling larger total memory capacities while maintaining stability and performance reliability.

Thermal Stability

The Samsung M393A4K40CB2-CTD operates at a nominal voltage of 1.2V, delivering energy-efficient performance while generating less heat than previous generations. Power efficiency is a key consideration in enterprise data centers, where multiple high-capacity memory modules can significantly contribute to overall system power consumption. Lower heat generation also simplifies cooling requirements and improves data center energy efficiency. Thermal stability is vital for continuous operation, ensuring that the memory module performs reliably under sustained workloads. Samsung’s manufacturing processes emphasize uniform electrical and thermal characteristics, preventing performance degradation and extending module longevity in high-density server environments.

Data Center Operational Benefits

Energy-efficient memory contributes to reduced operational costs, lower cooling requirements, and improved sustainability metrics in large-scale deployments. The Samsung M393A4K40CB2-CTD provides high memory capacity with reduced power draw, enabling data centers to achieve high performance without sacrificing efficiency. This aligns with modern IT strategies focused on sustainability, energy efficiency, and cost optimization.

Samsung Manufacturing Quality and Enterprise Validation

Samsung is a global leader in DRAM manufacturing, and the M393A4K40CB2-CTD exemplifies the company’s commitment to quality, consistency, and reliability. Each memory module undergoes rigorous testing to validate timing accuracy, voltage tolerance, thermal performance, and ECC functionality. This extensive validation ensures that the modules perform reliably across a wide range of enterprise platforms and workloads. Enterprise customers benefit from Samsung’s long-term product lifecycle management, providing consistent specifications, reliable availability, and simplified maintenance. These characteristics make this memory category suitable for long-term infrastructure planning and mission-critical server deployments.

Longevity and Reliability in Continuous Operation

Enterprise servers often run continuously for extended periods, placing high demands on memory reliability. Samsung’s rigorous testing and quality control minimize early-life failures and ensure stable operation over time. The M393A4K40CB2-CTD is built to withstand the demands of 24/7 server workloads, providing a reliable solution for high-availability computing environments where downtime is unacceptable.

Enterprise Application and Workload

The Samsung M393A4K40CB2-CTD 32GB DDR4 2666MHz PC4-21300 CL19 ECC Registered RDIMM memory module is ideal for a wide array of enterprise workloads. Application servers benefit from stable memory performance under high concurrency, while database servers leverage the module’s capacity for caching, in-memory processing, and accelerated query execution. This reduces dependency on slower storage systems and improves overall system responsiveness. File servers, storage controllers, and backup systems rely on reliable ECC RDIMM memory to manage metadata, caching, and data integrity operations.

Cloud Environments

Cloud infrastructures, both private and hybrid, demand memory solutions that can handle dynamic and unpredictable workloads. The 32GB capacity of this module enables flexible resource allocation while maintaining predictable performance and stability. ECC registered memory enhances system reliability, ensuring that multi-tenant virtualized environments function without disruption, even under heavy workloads.

Strategic Importance in Enterprise IT Architecture

Memory is a foundational component in modern enterprise IT architecture, directly influencing system performance, scalability, and reliability. The Samsung M393A4K40CB2-CTD exemplifies a high-quality solution within the DDR4 ECC registered RDIMM memory category, combining high capacity, fast data transfer rates, and error-correcting reliability. Its deployment in enterprise servers and workstations ensures that critical applications operate smoothly, workloads are efficiently managed, and IT infrastructure remains robust, scalable, and dependable under demanding operational conditions.