M321R4GA0PB2-CCPKF Samsung 32GB PC5-51200 4RX4 288P RDIMM ECC REG DDR5 RAM

Comprehensive Product Overview

The Samsung M321R4GA0PB2-CCPKF is a state-of-the-art 32GB memory module designed to deliver exceptional speed and reliability for demanding computing environments. Perfect for enterprise servers, workstations, and data-intensive applications, this module combines cutting-edge technology with robust performance.

Samsung M321R4GA0PB2-CCPKF 32GB Memory Module

The Samsung M321R4GA0PB2-CCPKF represents a critical advancement in server memory technology, engineered to meet the escalating demands of modern data centers, high-performance computing (HPC), and enterprise server environments. As a 32GB Registered DIMM (RDIMM) operating at a blistering DDR5-6400MHz (PC5-51200) speed, this module is not merely an upgrade from previous generations; it is a foundational component for building resilient, efficient, and extraordinarily powerful server infrastructure. Its design focuses on delivering unparalleled bandwidth, enhanced signal integrity, and improved power management, making it an indispensable choice for IT professionals and system builders who prioritize reliability and peak performance.

Key Specifications

At its heart, the M321R4GA0PB2-CCPKF is defined by a suite of technical specifications that place it at the forefront of DDR5 memory technology. Understanding these parameters is essential for selecting the right component for your server configuration.

Memory Capacity

This module provides a substantial 32GB (Gigabytes) of memory capacity. This density is ideal for balancing cost, performance, and system population flexibility, allowing for configurations ranging from robust mainstream servers to high-capacity systems. The module utilizes the 288-pin RDIMM form factor, the standard for DDR5 server memory, ensuring broad compatibility with next-generation server platforms from major OEMs. The "4RX4" designation indicates the module's organization: it is a 4 Rank (4R) module with an x4 data width. This internal architecture is crucial for maximizing memory bandwidth and optimizing the memory controller's efficiency within modern server CPUs.

Decoding the Part Number: M321R4GA0PB2-CCPKF

Samsung's part number provides a detailed blueprint of the module's attributes. M3 signifies a DDR5 module. 21 denotes the 32GB density. R4 confirms it is a Registered DIMM (RDIMM). GA indicates the component revision and specific design. 0PB2 refers to the substrate and material specifications. The suffix CCPKF is a speed bin code, defining its guaranteed operating frequency of DDR5-6400 and its specific latency timings, which are optimized for stability and performance.

Speed, Bandwidth, and Latency

The module operates at a data rate of 6400 Megatransfers per second (MT/s), formally classified under the PC5-51200 designation. The PC5 number (51200) represents the theoretical peak bandwidth in megabytes per second (MB/s) for the module. Calculated as (6400 MT/s * 8 bytes per transfer) = 51,200 MB/s. This massive bandwidth is a significant leap over DDR4, dramatically reducing data bottlenecks for CPU-intensive tasks. While specific primary timing values (such as CL-tRCD-tRP) are determined by the system BIOS and platform, this module is binned and tested to perform flawlessly at its rated 6400MHz speed with optimized latencies, ensuring rapid data access and retrieval.

Advanced DDR5 Features and Technologies

Beyond raw specifications, the Samsung M321R4GA0PB2-CCPKF incorporates several groundbreaking DDR5 architectural enhancements that redefine server memory performance and reliability.

On-Die ECC (Error Correction Code)

While the module features standard ECC (Error-Correcting Code) that detects and corrects single-bit errors across the data bus—a hallmark of server-grade memory—DDR5 introduces an additional layer of internal reliability with On-Die ECC. This feature allows the memory chip itself to correct minor bit errors within the DRAM cell array before data is sent to the system-level ECC. This proactive correction enhances data integrity, reduces the corrective workload on the system ECC, and contributes to overall module longevity and stability, which is paramount for mission-critical applications.

Power Management Integrated Circuit (PMIC)

A revolutionary shift in DDR5 is the migration of voltage regulation from the motherboard to the memory module itself via an integrated PMIC. The M321R4GA0PB2-CCPKF includes an advanced PMIC. This allows for more precise and stable power delivery to the DRAM components, reducing noise and improving signal integrity. The PMIC enables better power efficiency and provides enhanced granularity for power management, allowing systems to optimize voltage levels for different performance states, ultimately contributing to improved energy efficiency in the data center.

Dual Sub-Channel Architecture

Unlike DDR4's single 72-bit channel (64 data + 8 ECC), each DDR5 DIMM is organized into two independent 40-bit sub-channels (32 data + 8 ECC each). This dual sub-channel design effectively doubles the burst length and improves concurrency. For the system memory controller, this architecture allows for more efficient command handling and data access patterns, reducing latency and increasing overall memory access efficiency, which translates to smoother performance in multi-threaded and heavily loaded server environments.

Registered DIMM (RDIMM) Design and Benefits

The "RDIMM" in the product title is a critical differentiator, specifying a key design philosophy for server-grade memory that prioritizes stability and capacity over absolute lowest latency.

Registering Clock Driver (RCD)

An RDIMM incorporates a registering clock driver (RCD) chip. This chip acts as a buffer for the command and address signals sent from the server's memory controller. The RCD receives these signals, re-drives them with integrity, and then distributes them to the DRAM chips on the module. This buffering reduces the electrical load on the memory controller, allowing it to support a significantly higher number of memory modules per channel without signal degradation. This is the fundamental technology that enables high-capacity memory configurations in enterprise servers.

Stability in Dense Configurations

The primary advantage of the RDIMM design, as seen in the M321R4GA0PB2-CCPKF, is unparalleled stability in populated systems. When servers are fully loaded with memory modules (e.g., 16 or 24 DIMMs per CPU), maintaining signal clarity is a major challenge. The RCD ensures that commands and addresses arrive cleanly and synchronously at every DRAM chip, preventing errors and system crashes. This makes it the de facto standard for any server where uptime, data integrity, and maximum capacity are non-negotiable requirements.

Target Applications and Use Cases

The performance profile of the Samsung DDR5-6400 RDIMM makes it exceptionally suited for a wide array of demanding computational workloads.

Enterprise Databases and Virtualization

For large-scale relational databases (e.g., SQL Server, Oracle) and virtualization hypervisors (e.g., VMware vSphere, Microsoft Hyper-V), memory bandwidth and capacity are directly linked to transaction throughput and virtual machine (VM) density. The high bandwidth of this module accelerates data querying and manipulation, while the reliability of ECC and RDIMM design ensures the consistent operation of dozens of co-located VMs and critical database instances.

High-Performance Computing (HPC)

In scientific computing, financial modeling, and artificial intelligence training, workloads are often massively parallel and memory-bound. The PC5-51200 bandwidth is a key asset here, rapidly feeding vast datasets to high-core-count CPUs for simulations, genomic analysis, and algorithm training. The improved efficiency of the dual sub-channel architecture helps keep computational units fed with data, minimizing idle cycles and accelerating time-to-solution.

In-Memory Computing Platforms

Technologies like SAP HANA and other in-memory databases reside entirely within system RAM for ultimate speed. In such environments, the combination of high density (32GB per module), high bandwidth (6400MT/s), and extreme reliability (ECC/RDIMM) is essential. Populating a server with these modules creates a large, fast, and fault-tolerant memory pool that is the very foundation of real-time analytics and instant business intelligence.

Cloud Infrastructure and Hyperscale Data Centers

For cloud service providers and hyperscalers, the metrics of performance-per-watt. The integrated PMIC of this DDR5 module contributes to better power efficiency at the rack level. The high data rate allows for potentially fewer servers to handle the same network load, while the robustness of the design minimizes downtime and maintenance costs, aligning perfectly with the scale and efficiency demands of modern cloud infrastructure.

Compatibility and System Integration

Successful deployment of the Samsung M321R4GA0PB2-CCPKF requires careful consideration of platform compatibility and configuration guidelines.

Supported Platforms

This DDR5-6400 RDIMM is designed for next-generation server platforms based on Intel Xeon Scalable Processors (e.g., Sapphire Rapids, Emerald Rapids, and beyond) and AMD EPYC processors (e.g., Genoa, Bergamo, and later generations). It is critical to verify compatibility with the specific server motherboard or OEM system (from vendors like Dell, HPE, Lenovo, Supermicro) by consulting the manufacturer's qualified vendor list (QVL). The QVL confirms that the exact module has been tested and validated to run at its advertised speeds in that specific system model.

ECC Protection for Data Integrity

The combination of on-die ECC and standard side-band ECC provides a robust multi-layer defense against soft errors caused by electrical noise or alpha particle interference. This comprehensive error correction is a fundamental requirement for servers where data corruption is not an option, safeguarding financial records, customer information, scientific data, and transactional integrity.