M393A4K40CB2-CTD8Y Samsung 32GB PC4-21300 DDR4-2666MHz ECC Memory

Highlights of Samsung M393A4K40CB2-CTD8Y 32GB DDR4 Ram

The Samsung M393A4K40CB2-CTD8Y is a high-performance 32GB DDR4 ECC Registered (RDIMM) memory module engineered for enterprise servers and workstations. Designed to deliver stability, efficiency, and consistent throughput, this module is ideal for data centers, virtualization environments, and mission-critical applications.

General Information

• Manufacturer: Samsung
• Part Number: M393A4K40CB2-CTD8Y
• Product Category: Server Memory Module
• Sub Type: DDR4 SDRAM PC4-21300

Technical Specifications

• Capacity: 32GB
• Bus Speed: 2666 MT/s
• Memory Standard: DDR4-2666 / PC4-21300
• CAS Latency: CL19
• Data Integrity: ECC Supported
• Signal Processing: Registered (Buffered)
• Rank Configuration: Dual Rank x4 (2Rx4)

Physical & Form Factor Specifications

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

Compatibility

Supported Memory Standards

• DDR4 SDRAM Technology
• DDR4-2666 / PC4-21300
• ECC Registered (RDIMM)
• 2Rx4 Dual Rank Configuration
• 288-Pin DIMM Slot

Compatible Server Platforms

• Intel Xeon Scalable Processor-based Servers
• Intel Xeon E5 & Xeon Gold / Silver Systems
• AMD EPYC Server Platforms
• Enterprise Rack & Tower Servers

Compatible Server Brands

• Dell PowerEdge Servers
• HPE ProLiant Servers
• Lenovo ThinkSystem Servers
• Supermicro Server Motherboards
• IBM System x Servers

Overview of Samsung M393A4K40CB2-CTD8Y DDR4 PC4-21300

The Samsung M393A4K40CB2-CTD8Y 32GB DDR4-2666MHz PC4-21300 2Rx4 ECC 288-Pin RDIMM memory module represents a high-density, enterprise-grade registered memory solution designed for mission-critical server and workstation environments. This category of DDR4 RDIMM memory is engineered to meet the demanding requirements of modern data centers, virtualization platforms, database servers, cloud infrastructure, and high-performance computing systems. Built on Samsung’s advanced semiconductor manufacturing processes, this memory class delivers consistent reliability, electrical stability, and long-term operational endurance across sustained workloads.

DDR4 Technology and Performance Characteristics

DDR4 memory technology introduces substantial advancements over previous DDR3 generations, including higher bandwidth, reduced power consumption, and improved data integrity. Operating at 2666MHz with a PC4-21300 data rate, this memory category provides an effective balance between throughput and energy efficiency. The 2666MT/s speed enables faster data access, improved transaction processing, and reduced latency in memory-intensive server applications such as virtualization, in-memory databases, and real-time analytics.

PC4-21300 Bandwidth

With a PC4-21300 rating, this RDIMM memory category delivers up to 21.3GB/s of theoretical bandwidth per module. This level of bandwidth is critical for data-intensive workloads that rely on rapid memory access, such as ERP systems, AI inferencing workloads, and large-scale virtualization clusters. Systems equipped with multiple Samsung 32GB RDIMM modules can achieve substantial aggregate memory bandwidth, ensuring that processors are not bottlenecked by memory constraints.

High-Density 32GB Capacity for Scalable Systems

The 32GB capacity of the Samsung M393A4K40CB2-CTD8Y places it within a high-density memory category ideal for servers that require substantial RAM resources without excessive DIMM slot consumption. High-capacity modules allow system architects to maximize memory per socket, leaving room for future upgrades while maintaining optimal airflow and thermal management. This memory category is particularly advantageous for virtualization hosts, where each virtual machine demands a dedicated portion of system memory.

2Rx4 Dual-Rank Memory Organization

The 2Rx4 configuration indicates a dual-rank memory module with x4 DRAM chips, a design commonly favored in enterprise environments for its balance of performance and reliability. Dual-rank memory allows the memory controller to interleave access between ranks, improving throughput and efficiency under multi-threaded workloads. This design enhances memory-level parallelism, which is especially beneficial in multi-core processor architectures.

ECC Reliability for Mission-Critical Operations

ECC memory is a defining feature of enterprise-class RAM, and the Samsung M393A4K40CB2-CTD8Y category exemplifies this standard. Error-Correcting Code technology detects and corrects single-bit memory errors in real time, preventing data corruption and system crashes. In large-scale server environments where memory operates continuously under heavy load, even minor errors can have cascading effects on applications and services.

Enhanced Data Integrity and System Stability

By correcting memory errors before they impact applications, ECC memory significantly reduces the risk of silent data corruption. The Samsung M393A4K40CB2-CTD8Y category is engineered to maintain data integrity across prolonged operational periods, supporting 24/7 workloads in data centers and enterprise server rooms. This reliability contributes to lower maintenance costs and fewer unexpected outages.

288-Pin RDIMM Form Factor and Platform

The 288-pin RDIMM form factor is the industry standard for DDR4 registered server memory. The Samsung M393A4K40CB2-CTD8Y category adheres strictly to JEDEC specifications, ensuring broad compatibility with enterprise motherboards, rack servers, tower servers, and workstation platforms. This standardized design simplifies system integration and upgrade planning for IT professionals. Registered DIMMs are not interchangeable with unbuffered DIMMs, and this memory category is specifically intended for platforms that support RDIMM modules.

Thermal Design and Long-Term Durability

Server memory operates under continuous load, often in environments with elevated ambient temperatures. The Samsung M393A4K40CB2-CTD8Y memory category is manufactured using high-quality components and rigorous validation processes to ensure thermal stability and long-term durability. Consistent performance under sustained workloads is a hallmark of this enterprise memory class. The module’s design supports efficient heat dissipation, helping maintain stable operating temperatures even in densely populated server configurations. This thermal resilience contributes to extended component lifespan and reduced risk of performance throttling due to overheating.

Samsung Manufacturing Excellence and Quality Assurance

Samsung is a global leader in memory semiconductor technology, and the M393A4K40CB2-CTD8Y category reflects the company’s commitment to quality, innovation, and reliability. Each memory module is produced using Samsung’s own DRAM chips, ensuring tight integration between component design and manufacturing processes. This vertical integration allows for superior quality control and consistent performance across production batches. Enterprise memory modules in this category undergo extensive testing and validation to meet strict industry standards.

Data Center Grade Validation

This memory category is widely used by original equipment manufacturers and system integrators in enterprise server configurations. Its adherence to JEDEC standards and proven reliability make it a preferred choice for data center deployments, cloud service providers, and managed hosting environments. Consistency in performance and compatibility is critical for large-scale operations, and this category delivers on those expectations. By choosing memory modules from this category, organizations benefit from predictable performance characteristics and reduced failure rates, contributing to overall system stability and operational efficiency.

Use Cases Across Enterprise and Professional Environments

The Samsung M393A4K40CB2-CTD8Y 32GB DDR4 RDIMM memory category is designed to support a wide range of enterprise and professional use cases. Virtualization platforms such as VMware, Hyper-V, and KVM rely heavily on large, reliable memory pools to host multiple virtual machines efficiently. This memory category enables higher VM consolidation ratios while maintaining consistent performance. Database servers, including relational and NoSQL platforms, benefit from increased memory capacity that allows more data to be cached in RAM.

Professional Workstations and Compute Nodes

Beyond traditional servers, this RDIMM memory category is also suitable for high-end professional workstations and compute nodes used in engineering, scientific research, and content creation. Applications such as simulation, rendering, and data modeling require substantial memory resources and benefit from the stability and error correction features of ECC RDIMM memory. By integrating this memory category into professional systems, users gain improved reliability and confidence in long-running computational tasks, where memory errors could otherwise invalidate results or cause application failures.

Operational Cost Benefits

DDR4 memory operates at lower voltages compared to previous generations, contributing to improved power efficiency in enterprise systems. The Samsung M393A4K40CB2-CTD8Y category leverages DDR4’s reduced power consumption to help lower overall energy usage in data centers. When deployed at scale, these efficiency gains translate into meaningful reductions in operational costs. Lower power consumption also reduces heat output, easing the burden on cooling infrastructure. This not only improves system reliability but also supports more sustainable and environmentally responsible data center operations.

Continuous 24/7 Workloads

Enterprise memory must perform reliably around the clock, and this category is engineered for continuous operation. The combination of registered buffering, ECC protection, and high-quality DRAM components ensures stable performance under constant load. This reliability is essential for organizations that depend on uninterrupted access to critical applications and services. The long-term stability of this memory category supports extended refresh cycles, allowing organizations to maximize the return on their infrastructure investments while maintaining high service levels.

Scalability and Future-Proof Infrastructure Design

As enterprise workloads continue to grow in complexity and scale, memory scalability becomes a critical factor in infrastructure design. The Samsung M393A4K40CB2-CTD8Y 32GB RDIMM category enables organizations to build systems with substantial memory headroom, accommodating future growth without immediate hardware replacement. By populating servers with high-capacity RDIMM modules, IT teams can design flexible architectures that adapt to evolving application requirements. This scalability is particularly valuable in cloud and hybrid environments, where resource demands can change rapidly.

Modern Processor Platforms

This memory category is compatible with a wide range of modern server processors that support DDR4-2666 RDIMM memory. Its standardized specifications ensure seamless integration with current-generation platforms while maintaining backward compatibility with systems designed for DDR4 RDIMM modules. The result is a versatile memory solution that supports both new deployments and upgrades to existing infrastructure, providing organizations with greater flexibility in their hardware lifecycle management.