M393A4K40BB2-CTD Samsung 32GB DDR4 SDRAM PC4-21300 Ecc 2666MT/s

Highlights of Samsung M393A4K40BB2-CTD 32GB 2666MT/s Ram

The Samsung M393A4K40BB2-CTD is a high-performance 32GB DDR4 RDIMM memory module designed for enterprise servers and professional computing systems. It provides error-correcting ECC functionality, registered signal processing, and optimized CAS latency for reliable and stable operation in demanding server environments.

General Information

• Manufacturer: Samsung
• Part Number: M393A4K40BB2-CTD
• Product Category: Server Memory Module
• Memory Interface: DDR4 PC4-21300

Technical Specifications

• Total Capacity: 32GB
• Module Configuration: 1 x 32GB
• Rank Type: Dual Rank
• Memory Speed: 2666 MT/s
• Bus Rating: DDR4-2666 / PC4-21300
• CAS Latency: CL19
• Memory Type: DDR4 SDRAM
• Error Correction: ECC (Error-Correcting Code)
• Signal Processing: Registered

Physical Specifications

• Form Factor: 288-Pin RDIMM
• Shipping Height: 1.00 inch
• Shipping Depth: 6.75 inches
• Shipping Weight: 0.20 lb

Compatibility

Supported Server Platforms

• Dell PowerEdge servers compatible with DDR4 ECC RDIMM
• HPE ProLiant Gen9, Gen10, and Gen11 servers
• Lenovo ThinkSystem and System x servers
• Supermicro X10, X11, and X12 motherboard platforms
• IBM and other enterprise-class server systems

Processor Compatibility

• Intel Xeon E5-2600 v3 and v4 processors
• Intel Xeon Scalable processors (Bronze, Silver, Gold, Platinum)
• AMD EPYC 7001, 7002, and 7003 series processors

Overview of Samsung M393A4K40BB2-CTD DDR4 PC4-21300 ECC

The Samsung M393A4K40BB2-CTD 32GB DDR4 2666MT/s PC4-21300 CL19 ECC SDRAM Registered RDIMM memory module belongs to a high-performance enterprise memory category, specifically developed for professional server environments, data centers, and mission-critical computing infrastructure. This category is defined by a combination of DDR4 technology, Registered DIMM architecture, and Error-Correcting Code (ECC) support, providing the reliability, stability, and data integrity required for enterprise-level applications. Memory modules in this category are designed to sustain high workloads, support dense configurations, and deliver predictable performance in environments that demand continuous uptime and operational efficiency.

Registered DIMM (RDIMM) Architecture and Electrical

Registered DIMMs are a critical aspect of this category, providing a buffer between the memory controller and DRAM chips that reduces electrical loading and ensures signal integrity. The register effectively isolates the DRAM from the memory controller, allowing multiple high-capacity modules to be installed per channel without degrading system stability. RDIMM architecture is particularly advantageous in multi-socket server configurations where electrical loading and trace length can impact signal quality and overall reliability.

Signal Integrity and Channel Stability

The presence of a register ensures accurate transmission of address and command signals to each DRAM chip, reducing timing skew and minimizing the likelihood of data errors. This characteristic allows enterprise servers to operate with full memory population while maintaining consistent latency and throughput. The Samsung M393A4K40BB2-CTD module illustrates the robust electrical design typical of this category, supporting stable operation across high-density, multi-channel server environments.

Load Distribution Across Multiple Modules

RDIMM modules distribute electrical load across channels, preventing signal degradation when multiple modules are installed. This capability is critical in high-availability systems, virtualization clusters, and cloud infrastructure where maximum memory capacity and stable performance are essential. Load balancing and signal buffering contribute directly to overall system reliability and operational continuity.

DDR4 SDRAM Technology and PC4-21300 Performance

DDR4 SDRAM forms the backbone of this memory category, offering enhanced bandwidth, lower power consumption, and higher memory density compared to DDR3. Operating at 2666MT/s with a PC4-21300 bandwidth, modules in this category provide the throughput necessary for enterprise workloads, including virtualization, analytics, and transactional processing. DDR4 technology also improves energy efficiency, making it suitable for dense server deployments where thermal management and power usage are critical considerations. The primary design objective of this category is stable and sustained memory performance rather than short-term peak speeds.

CAS Latency CL19 and Timing Considerations

The Samsung M393A4K40BB2-CTD module operates at CL19 latency, balancing access speed with stability. Enterprise memory prioritizes consistent latency over the lowest possible CAS timing, as predictable performance is critical for virtualization, database management, and mission-critical applications. Stable timing reduces the risk of system bottlenecks, ensures responsive application behavior, and maintains workload performance even under full memory utilization.

Multi-Core Processor Bandwidth

Modern enterprise processors often feature multiple cores and several memory channels. Modules in this category ensure even bandwidth distribution across channels, reducing contention and optimizing data throughput. This architecture supports high-performance applications, multi-threaded workloads, and memory-intensive operations such as ERP systems, virtualization platforms, and analytical engines.

ECC Functionality

ECC is a defining feature of this category, providing real-time detection and correction of single-bit memory errors to protect against data corruption. The Samsung M393A4K40BB2-CTD module integrates ECC functionality at the hardware level, which is essential for servers that require continuous uptime and operational reliability. ECC memory minimizes the risk of application crashes and data loss, ensuring mission-critical systems remain fully operational. ECC is particularly valuable in enterprise environments where memory errors could propagate into application-level failures, including financial systems, healthcare platforms, and cloud services. By detecting and correcting errors automatically, this memory category maintains both data integrity and system stability over extended periods of operation.

High Availability and Fault Tolerance

Modules in this category enhance system reliability by preventing memory-related failures and improving fault tolerance. ECC functionality allows enterprise servers to maintain high availability, reducing maintenance windows and supporting uninterrupted operation of business-critical applications. Enterprise platforms often feature error monitoring systems that log corrected and uncorrected memory errors, enabling predictive maintenance. This category is fully compatible with such monitoring capabilities, allowing administrators to proactively replace modules before they affect system performance or stability. Predictive error logging enhances overall system reliability and reduces operational risks.

Physical Design and 288-Pin RDIMM Form Factor

The Samsung M393A4K40BB2-CTD module adheres to the 288-pin RDIMM standard, ensuring mechanical compatibility with enterprise server motherboards. The RDIMM form factor provides secure installation, reliable electrical contacts, and stability in high-density server configurations. Mechanical robustness is essential in data centers where modules must withstand thermal cycling, airflow fluctuations, and vibrations without affecting performance.

Material Quality and Manufacturing Standards

Modules in this category are built with high-quality PCBs and precise manufacturing processes, ensuring electrical stability and mechanical durability. The Samsung M393A4K40BB2-CTD module reflects enterprise-grade engineering, minimizing failure rates and supporting long-term deployment. Consistent manufacturing quality ensures uniform behavior across modules, which is critical for large-scale deployments.

Enterprise Server Platforms

This category is compatible with a wide range of enterprise servers supporting DDR4 ECC Registered memory. It integrates seamlessly into rack-mounted, tower, and blade servers, supporting high-performance workloads across multi-socket configurations. Samsung's extensive OEM validation ensures consistent module performance and compatibility across platforms.

Automatic BIOS and Firmware Configuration

Enterprise server BIOS and firmware can detect RDIMM modules automatically, configuring voltage, frequency, and timing settings via standardized SPD profiles. This automatic configuration reduces deployment complexity, eliminates manual errors, and ensures immediate operational readiness for enterprise workloads.

Firmware Updates and Long-Term Platform

Modules in this category comply with JEDEC standards, maintaining predictable behavior during firmware and platform updates. Long-term platform support ensures that modules continue to function reliably over the server lifecycle, supporting continuous enterprise operations without interruptions.

Scalability and Memory Expansion

Scalability is a core feature of this memory category. The 32GB capacity allows administrators to incrementally populate server memory channels based on current workload requirements, while planning for future expansion. Multi-socket configurations can reach total capacities in the hundreds of gigabytes, offering enterprise systems the flexibility to scale without sacrificing stability or performance.

Cloud Infrastructure Benefits

Memory-intensive virtualization platforms benefit from the higher capacity and ECC protection of this category. Increased memory density supports greater virtual machine counts, improved resource allocation, and enhanced performance for private and public cloud infrastructures. ECC ensures workload isolation and data integrity across multiple virtualized environments.

Enterprise Database and In-Memory Applications

Applications relying on in-memory processing, such as large databases, caching systems, and real-time analytics platforms, require high-capacity, reliable memory. Modules in this category provide predictable bandwidth, low latency, and ECC protection, ensuring optimal performance and data integrity for critical enterprise applications.

Manufacturing Quality, Testing, and Lifecycle

Samsung implements strict quality assurance protocols for this category, including module-level testing, chip screening, and burn-in validation. These procedures ensure that each module meets enterprise-grade reliability standards, providing consistent performance and durability across deployments. Consistency across production batches is essential for enterprise deployments. Uniform electrical characteristics and timing profiles simplify large-scale server maintenance and replacement, reducing operational risks and ensuring system reliability.

JEDEC Industry Standards

Modules in this category adhere to JEDEC standards, guaranteeing compatibility with a wide array of server platforms and predictable performance under demanding workloads. Compliance with industry specifications ensures that modules maintain reliability and operational integrity across long-term deployments.

Long-Term Availability and Replacement Assurance

Enterprise environments often require consistent memory availability over years of operation. Modules in this category offer long-term availability, supporting maintenance, expansion, and replacement with identical or compatible modules. This ensures system consistency, reduces configuration complexity, and protects infrastructure investments.

Application Domains and Enterprise Use Cases

The Samsung M393A4K40BB2-CTD memory category supports a wide range of enterprise workloads, including ERP systems, CRM platforms, virtualization servers, transactional databases, and analytics engines. Modules in this category provide stable, high-capacity memory performance under concurrent access and sustained workloads.

High-Availability Financial Systems

Financial systems require uninterrupted operation and robust memory error correction. ECC RDIMM modules prevent data corruption and maintain transactional integrity, ensuring reliable performance for critical banking and financial platforms.

Scientific Computing, Simulation, and Data Analysis

Scientific and engineering applications, simulations, and data analysis workloads benefit from the high capacity, stability, and ECC protection offered by this category. Reliable memory ensures accurate computational results and system stability during long-running operations.

Positioning Within the DDR4 Enterprise Memory Market

Within the DDR4 enterprise memory ecosystem, the Samsung M393A4K40BB2-CTD module represents a mature, reliable, and widely adopted solution. It balances performance, density, and energy efficiency, making it suitable for a broad range of server platforms and enterprise workloads. Although DDR5 memory is emerging, DDR4 modules in this category remain relevant due to broad platform support, proven reliability, and cost-effective deployment. Enterprises can expand memory capacity and enhance performance without requiring full platform upgrades, preserving infrastructure investments.

Strategic IT Planning and Operational Reliability

This category enables organizations to extend server lifespans and improve system performance through incremental memory upgrades. The combination of 32GB module capacity, ECC protection, and low-voltage efficiency ensures cost-effective scaling for enterprise deployments. The Samsung M393A4K40BB2-CTD memory category supports strategic IT initiatives by offering predictable performance, broad platform compatibility, and sustained reliability. Its design prioritizes stability, scalability, and long-term operational value, making it a foundational component of enterprise server memory infrastructure.