M321R8GA0BB0-CQKUE Samsung DDR5 SDRAM Memory Module 64GB for Server

Samsung M321R8GA0BB0-CQKUE 64GB DDR5 RDIMM Memory

The Samsung M321R8GA0BB0-CQKUE is a high-capacity DDR5 SDRAM memory module engineered to meet the demanding requirements of enterprise servers, data centers, and professional workstations. Designed with next-generation DDR5 architecture, this 64GB RDIMM delivers higher bandwidth, improved efficiency, and enhanced reliability compared to previous memory generations. Its balanced performance profile makes it suitable for virtualization, cloud computing, database processing, and mission-critical workloads.

Product Information

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

Technical Specifications

• Memory Size: 64GB
• Memory Technology: DDR5 SDRAM
• Module Count: Single Module (1 x 64GB)
• Bus Speed: 4800 Mbps (DDR5-4800/PC5-38400)

• 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

Latency and Timing Characteristics

• CAS latency rating of CL40
• Balanced timing configuration for dependable performance
• Optimized for stability rather than consumer-level overclocking

Physical Design and Form Factor

• 288-pin RDIMM form factor
• Designed specifically for server and workstation platforms
• Not compatible with desktop UDIMM slots

Compact and Lightweight Construction

• Shipping height: 1.00 inch
• Shipping depth: 6.75 inches
• Approximate shipping weight: 0.20 lb

Typical Use Cases

• Enterprise servers and rack-mounted systems
• Virtualization and private cloud infrastructures
• High-performance computing workloads
• Database servers and in-memory applications
• Professional workstations requiring ECC memory

Samsung MM321R8GA0BB0-CQKUE 64GB DDR5 RDIMM Memory

The Samsung M321R8GA0BB0-CQKUE is a high-performance 64GB DDR5 Registered DIMM (RDIMM) memory module designed to meet the demands of data-intensive applications. With a speed rating of 4800MT/s and built with error correction (ECC) support, this memory module is optimized for enterprise environments, offering enhanced reliability, efficiency, and power savings. DDR5 RDIMMs are designed to alleviate the electrical load on the server's memory controller. By incorporating a register (or buffer) on the module itself, they manage the electrical signaling for the DRAM chips, allowing systems to support significantly higher memory capacities and more DIMMs per channel without overburdening the controller. This makes them the de facto standard for servers, high-end workstations, and storage arrays. The shift from DDR4 to DDR5 within this registered category brings forth transformative improvements in speed, efficiency, reliability, and density, setting a new benchmark for computational infrastructure.

The Samsung DDR5 RDIMM Memory

Samsung M321R8GA0BB0-CQKUE is recognized globally for its memory engineering expertise and rigorous quality standards. This 64GB DDR5 RDIMM reflects that legacy, offering dependable performance, long-term reliability, and compatibility with modern server ecosystems. Its thoughtful balance of speed, capacity, and data protection makes it a strategic upgrade for organizations planning future-ready infrastructure. To fully appreciate the capabilities of this memory category, a detailed breakdown of the product nomenclature is essential. Each segment of the part number reveals a key specification, defining its place and function within a server ecosystem.

Advanced DDR5 Architecture for Scalable Performance

This Samsung M321R8GA0BB0-CQKUE DDR5 memory module leverages the latest SDRAM technology to deliver faster data throughput and greater memory density. With DDR5 improvements such as higher base speeds and optimized power delivery, system performance scales efficiently even under heavy multitasking and data-intensive environments. The design prioritizes stability and consistency, ensuring reliable operation across long deployment cycles.

Speed and Bandwidth: 4800MT/s & PC5-38400

The "4800MBPS" specifies the data transfer rate in Mega transfers per second (MT/s). Each transfer happens on both the rising and falling clock edges (Double Data Rate). "PC5-38400" is the module's industry-standard designation, where 'PC5' indicates DDR5 and '38400' represents the theoretical peak bandwidth in megabytes per second (MB/s). This is calculated as 4800 MT/s * 8 bytes (64-bit data path) = 38,400 MB/s. This substantial bandwidth is critical for feeding multi-core CPUs, reducing bottlenecks in data analytics, scientific simulation, and virtualized environments.

Capacity: 64GB

The Samsung M321R8GA0BB0-CQKUE DDR5 SDRAM Memory Module is packed with a massive capacity of 64GB, making it an ideal choice for users who require high-performance memory for their computing needs. With such a large capacity, this memory module is capable of handling resource-intensive tasks and applications with ease. Whether you are a professional video editor working on large multimedia projects or a hardcore gamer who demands the best performance from your system, the 64GB capacity of this memory module ensures that you can multitask, run memory-hungry applications, and experience seamless performance without any lag or slowdowns.

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.

Form Factor: 1.1v, CL40, 288-pin

Operating at a lower voltage of 1.1V (compared to DDR4's 1.2V), DDR5 RDIMMs like this Samsung module achieve higher performance with improved power efficiency—a crucial factor for reducing Total Cost of Ownership (TCO) in large deployments. The CAS Latency (CL40) represents the number of clock cycles between a read command and data availability. While this number is higher than typical DDR4 latencies, the significantly faster clock speed of DDR5 means absolute latency (in nanoseconds) remains competitive or improves, while bandwidth sees a massive gain. The 288-pin physical design is specific to DDR5 and is not compatible with DDR4 motherboards or slots.

Firmware

Samsung M321R8GA0BB0-CQKUE 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.

Samsung M321R8GA0BB0-CQKUE memory chips are renowned for their quality. Each RDIMM is subjected to stringent testing at the component and module level, including high-temperature operating tests, to ensure they meet the rigorous demands of 24/7 server operation. This results in lower failure rates and higher mean time between failures (MTBF), contributing directly to system uptime and reduced maintenance costs.

Compatibility

Deploying the Samsung M321R8GA0BB0-CQKUE 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.