M321R8GA0BB0-CQKDS Samsung 64GB Memory Kits RDIMM PC5-38400 DDR5 CL40 Dual Rank 2RX4

Samsung M321R8GA0BB0-CQKDS 64GB Memory Module

High-capacity DDR5 M321R8GA0BB0-CQKDS server memory modules are designed to meet the demanding workloads of modern data centers, virtualization platforms, cloud infrastructures, and enterprise servers. This category focuses on advanced registered DDR5 SDRAM solutions that deliver higher bandwidth, improved reliability, and better power efficiency compared to previous memory generations. These modules are purpose-built for mission-critical environments where uptime, data accuracy, and scalability are essential.

Product Details

• Brand: Samsung
• Part Number: M321R8GA0BB0-CQKDS
• Product Type: 64GB DDR5 SDRAM Memory Module

Technical Specifications

• Total Capacity: 64GB
• Memory Technology: DDR5 SDRAM
• Module Count: Single Module (1 x 64GB)

Performance Features

• Bus Speed: 4800 MBPS (DDR5-4800/PC5-38400)
• Error Checking: ECC (Error-Correcting Code)
• Signal Processing: Registered
• CAS Latency: CL40
• Rank Type: Dual Rank

Benefits of Registered DDR5 Memory

• Improved signal stability under heavy loads
• Support for higher memory densities
• Reduced strain on the memory controller
• Consistent performance in multi-DIMM configurations

ECC Advantages in Enterprise Systems

• Automatic detection and correction of memory errors
• Enhanced data integrity for critical applications
• Lower risk of system instability
• Essential for servers, virtualization, and databases

Recommended Usage Scenarios

• Enterprise servers and data centers
• Cloud computing infrastructures
• Virtualization and containerized platforms
• High-performance and memory-intensive applications

Samsung M321R8GA0BB0-CQKDS 64GB DDR5 Memory

This specific memory module is a meticulously crafted component built to Samsung's M321R8GA0BB0-CQKDS 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-CQKDS 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.

Samsung 64GB DDR5 RDIMM for Server Platforms

The Samsung M321R8GA0BB0-CQKDS belongs to a premium class of server-grade DDR5 memory modules engineered for continuous operation and intensive multitasking. With a substantial 64GB capacity in a single module, it enables system architects to maximize memory density while maintaining fewer occupied DIMM slots, supporting efficient server expansion strategies.

The DDR5 Advantage

Building upon DDR4, the DDR5 architecture in the Samsung M321R8GA0BB0-CQKDS brings transformative improvements: With a data rate of 4800 Mega transfers per second (MT/s), labeled as PC5-38400 (where 38400 MB/s is the theoretical peak bandwidth per channel), DDR5 starts at speeds where high-end DDR4 topped out. This translates directly to higher available bandwidth for CPU cores, reducing bottlenecks in data-intensive workloads. Each DDR5 DIMM is organized into two independent 32-bit sub-channels. While a server RDIMM still presents a single 72-bit channel (64 data + 8 ECC) to the memory controller, internal management can improve efficiency and reduce latency for certain access patterns compared to DDR4's single 64-bit channel.

Speed: PC5-38400

The Samsung M321R8GA0BB0-CQKDS Memory Kit offers impressive speed capabilities with a rating of PC5-38400. This high-speed memory is designed to deliver exceptional performance and cater to the needs of users who demand fast and responsive memory solutions.

Advanced DDR5 Memory Technology

DDR5 SDRAM represents a major leap forward in memory performance. Compared to DDR4, DDR5 offers significantly higher bandwidth, better power management, and improved efficiency per watt. This category is ideal for workloads such as large-scale databases, virtualization, artificial intelligence, analytics, and high-performance computing environments.

High-Speed Data Transfer Performance

Operating at DDR5-4800 speeds, this memory module delivers a bus rate of 4800 Mbps, also identified as PC5-38400. This level of performance allows servers to process larger datasets faster, reduce latency bottlenecks, and maintain smooth operation under peak loads.

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 capacity per dual in-line memory module (DIMM) is a sweet spot for modern servers. It enables high memory density in multi-socket platforms, allowing system builders to achieve terabytes of total RAM in a single chassis without excessive slot consumption. This is crucial for memory-intensive applications like in-memory databases (e.g., SAP HANA), virtualized environments with high consolidation ratios, and real-time analytics platforms.

Speed and Timings: The Performance Core

The M321R8GA0BB0-CQKDS coding indicates a module conforming to JEDEC standard timings. While the exact speed (e.g., 4800MT/s, 5600MT/s) is part of this code, Samsung's DDR5 server modules typically offer high data rates starting at 4800 Mega transfers per second (MT/s), with headroom for higher speeds. This increased transfer rate, combined with DDR5's dual 32-bit sub-channels (effectively creating a 40-bit channel with ECC), provides a substantial bandwidth uplift over DDR4, directly translating to faster application response times and improved handling of concurrent workloads.

Reliability

Server environments demand uncompromising reliability. This category of DDR5 memory modules integrates advanced data protection mechanisms to minimize system errors and reduce the risk of data corruption. These features are essential for businesses that rely on continuous availability and accurate data processing.

Form Factor and Registered DIMMs (RDIMMs)

This module is almost certainly a Registered DIMM (RDIMM). RDIMMs incorporate a register (or buffer) on the module that sits between the memory controller and the DRAM chips. This register buffers the command and address signals, reducing the electrical load on the memory controller.

Thermal Management

Server DIMMs often operate in high-ambient-temperature environments within densely packed chassis. Samsung M321R8GA0BB0-CQKDS 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.

Compatibility

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-CQKDS 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.