M321R8GA0BB0-CQKZL Samsung 64GB PC5-38400 RDIMM Memory Module

Product Information

• Brand: Samsung
• Part Number: M321R8GA0BB0-CQKZL
• Product Type: DDR5 SDRAM Memory Module

Technical Specifications

• Capacity: 64GB for high-performance computing
• Module Configuration: Single 64GB module
• Data Transfer Rate: 4800MT/s (DDR5-4800 | PC5-38400)
• Data Integrity: ECC (Error-Correcting Code) for reliability
• Module Type: RDIMM (Registered DIMM) for server-grade performance
• CAS Latency: CL40 for optimized memory timing
• Rank: Dual Rank to boost memory bandwidth
• Voltage: 1.1V for energy-efficient operation

Error Correction and Signal Integrity

• ECC Support: Automatically detects and corrects memory errors
• Registered Signal Processing: Enhances stability in multi-module configurations
• Reduced risk of data corruption during sustained workloads
• Ideal for enterprise servers, virtualization hosts, and database systems

Single Module, High-Density Deployment

• One module configuration: 1 × 64GB
• Supports simplified upgrades and flexible scaling
• Ideal for systems with limited DIMM slots

288-Pin RDIMM Form Factor

• Industry-standard 288-pin registered DIMM layout
• Designed specifically for server and workstation platforms
• Not compatible with desktop or unbuffered DIMM slots

Samsung M321R8GA0BB0-CQKZL 64GB DDR5 Memory

This specific memory module is a meticulously crafted component built to Samsung's M321R8GA0BB0-CQKZL renowned standards for quality and performance. Let's break down its key specifications and what they mean for your server infrastructure. In the realm of enterprise computing, server memory is not merely a component; it is the critical workspace that determines the speed, capacity, and reliability of data processing. The transition to DDR5 SDRAM (Synchronous Dynamic Random-Access Memory) represents a monumental leap from previous generations, offering transformative improvements in bandwidth, power efficiency, and error management. The Samsung M321R8GA0BB0-CQKZL 64GB DDR5 kit is a premier example of this technology, engineered specifically for the relentless demands of servers powering cloud infrastructure, hyperscale data centers, big data analytics, and high-performance computing (HPC) clusters.

The Architectural Pillars of DDR5 Technology

DDR5 memory introduces fundamental architectural changes designed to overcome the bottlenecks of DDR4. Its innovations are not incremental but foundational, enabling a new era of server performance and scalability. A key advancement is the doubling of the burst length from 8 (DDR4) to 16. This allows for a larger chunk of data to be moved with each column access, significantly improving efficiency in sequential data transfers common in server workloads. Furthermore, DDR5 expands the number of bank groups, which are independent units within the memory chip that can be accessed concurrently. This architectural parallelism drastically reduces access latency and increases overall data throughput, allowing the CPU to be fed with data more consistently.

Capacity: 64GB

The "64GB" denotes a substantial single-module capacity, enabling high-density memory configurations. For instance, an eight-slot platform can achieve 512GB of RAM with ease. "Dual Rank" refers to the internal organization of the memory M321R8GA0BB0-CQKZL chips. A rank is an independently addressable set of DRAM chips. Dual Rank modules offer an optimal balance: they provide better performance than Single Rank modules (due to interleaving, which allows the memory controller to access one rank while preparing the other) and are typically more cost-effective and power-efficient than Quad Rank modules for a given capacity. This makes 64GB Dual Rank RDIMMs an exceptionally popular choice for balanced, high-performance server builds.

Speed: PC5-38400

The Samsung M321R8GA0BB0-CQKZL Memory Module boasts an impressive speed of PC5-38400, ensuring lightning-fast performance for your computing needs. The high speed allows for faster data transfer rates and reduces latency, resulting in a more responsive and efficient system. With its PC5-38400 speed, this memory module enhances your productivity by reducing the time required for data-intensive tasks. Whether you are working on complex calculations, rendering 3D models, or compiling code, the increased speed ensures that your system can handle these tasks swiftly and efficiently. This results in improved overall productivity and faster completion of projects.

From Factor and Versatile Design

The Samsung M321R8GA0BB0-CQKZL Memory Module features a compact RDIMM form factor, making it suitable for a wide range of computing systems. The RDIMM form factor ensures compatibility with various motherboards and allows for easy installation in tight spaces. Whether you have a desktop computer, workstation, or server, this memory module can seamlessly integrate into your system.

Technology: ECC and Registered

The "ECC" (Error-Correcting Code) and "Registered" features are what fundamentally distinguish server memory from consumer-grade DIMMs. ECC is a non-optional reliability feature for critical systems. It can detect and correct single-bit memory errors on-the-fly and detect multi-bit errors, preventing silent data corruption, system crashes, and computational errors. The "Registered" aspect, facilitated by the Registering Clock Driver (RCD), buffers the address, command, and clock signals, ensuring signal integrity at high speeds and with high module counts. This combination ensures data accuracy and system stability at scale.

Thermal Management

Server DIMMs often operate in high-ambient-temperature environments within densely packed chassis. Samsung M321R8GA0BB0-CQKZL modules utilize high-quality components and PCB designs optimized for efficient heat dissipation. Many server-grade modules, including variants of this type, may also feature a Thermal Sensor On-Die (TSOD) or support for PMIC (Power Management Integrated Circuit) thermal monitoring, allowing the system to proactively manage airflow or throttle performance if needed to protect the hardware.

Firmware

Samsung M321R8GA0BB0-CQKZL works closely with leading server OEMs (Dell, HPE, Lenovo, Super micro) and CPU manufacturers to ensure their memory firmware and microcode are optimized for broad platform compatibility and performance. This deep integration at the firmware level helps unlock the full potential of the DDR5 specification in real-world deployments. The RDIMM form factor offers flexibility and expandability options for your system. You can easily upgrade your memory capacity by adding additional RDIMM modules without the need for complex configurations or hardware modifications. This allows you to adapt your system to changing requirements and future-proof your investment.

Compatibility

Deploying the Samsung M321R8GA0BB0-CQKZL requires careful attention to platform compatibility. It is designed for server and workstation platforms utilizing Intel Xeon Scalable Processors (Sapphire Rapids, Emerald Rapids, and later generations) and AMD EPYC 7004 "Genoa" and 8005 "Siena" series processors (and beyond). These platforms feature memory controllers specifically designed to leverage DDR5's capabilities, including support for the 1.1v operating voltage and the DDR5 RDIMM protocol. This category of Samsung DDR5 server memory is compatible with a wide range of enterprise-grade servers that support DDR5 RDIMM technology. It is particularly suitable for data centers upgrading from DDR4 platforms to newer architectures that demand higher memory bandwidth and efficiency. Deploying the Samsung M321R8GA0BB0-CQKZL requires careful attention to platform compatibility. It is designed for server and workstation platforms utilizing Intel Xeon Scalable Processors (Sapphire Rapids, Emerald Rapids, and later generations) and AMD EPYC 7004 "Genoa" and 8005 "Siena" series processors (and beyond). These platforms feature memory controllers specifically designed to leverage DDR5's capabilities, including support for the 1.1v operating voltage and the DDR5 RDIMM protocol.