M321R4GA3PB0-CWMXJ Samsung 32GB RDIMM PC5-44800 Memory

• Manufacturer: Samsung
• Part Number: M321R4GA3PB0-CWMXJ
• Product Type: 32GB DDR5 SDRAM Server Memory

Technical Information

• Capacity: 32GB
• Module Count: 1 × 32GB RDIMM
• Memory Technology: DDR5 SDRAM
• Speed: 5600 MT/s (DDR5-5600, PC5-44800)
• Data Integrity: ECC
• Module Type: Registered DIMM
• Rank Structure: 2Rx8
• CAS Latency: CL46

Efficiency Through Advanced DDR5 Design

DDR5 SDRAM introduces enhanced power management and greater module density, enabling servers to run more efficiently while delivering superior output. Its improved architecture increases reliability, reduces latency impact, and delivers higher sustained bandwidth for enterprise infrastructures.

Platform Requirements

The Samsung M321R4GA3PB0-CWMXJ requires a server platform built on Intel Xeon Scalable Processors (Sapphire Rapids, Emerald Rapids, and later) or AMD EPYC 7004 Series (Genoa, Bergamo) and newer. These platforms feature memory controllers specifically designed for DDR5's voltage, signaling, and protocol. The physical notch on a DDR5 module is in a different position than DDR4, preventing accidental insertion into the wrong slot.

The designation PC5-44800 M321R4GA3PB0-CWMXJ is the module's industry-standard classification. The "PC5" refers to DDR5, and the "44800" denotes the theoretical peak transfer rate in megabytes per second (MB/s) per module. This equates to a data rate of 5600 Megatransfers per second (MT/s), often loosely called 5600MHz. At this speed, the 64-bit data bus (comprised of the two 32-bit sub-channels) delivers a staggering peak bandwidth of approximately 44.8 GB/s per module. This enables servers to process vast datasets with dramatically reduced wait times, accelerating everything from database queries to scientific simulations.

Capacity : 32GB

With a capacity of 32GB, M321R4GA3PB0-CWMXJ this module sits in the high-density mainstream for current server deployments. The 2Rx8 (2 Rank, x8) configuration is highly significant. "Ranks" are independent sets of DRAM chips that operate together. A dual-rank (2R) module like this effectively interleaves accesses between its two ranks, often improving performance over a single-rank module of the same capacity by better utilizing the memory channel. The "x8" refers to the data width of the individual DRAM chips (8 bits). This configuration offers an excellent balance of performance, manufacturability, and compatibility across a wide range of server platforms from Intel (Xeon Scalable) and AMD (EPYC).

Error Correction: ECC

As an ECC (Error-Correcting Code) RDIMM, this module provides the highest level of data integrity. It goes beyond the on-die ECC by adding module-level error correction. It can detect and correct single-bit errors on-the-fly and detect multi-bit errors, preventing silent data corruption that could crash applications or corrupt databases. This is non-negotiable for financial institutions, research facilities, cloud infrastructure, and any enterprise where data accuracy and system uptime are paramount.

Reliability

Samsung modules undergo exhaustive testing at the component, module, and system level. Their stringent manufacturing processes result in exceptionally low failure rates (FIT rates). For enterprise customers, this translates to higher server uptime, lower total cost of ownership (TCO) due to fewer replacements, and peace of mind for critical deployments.

Stability

Samsung's massive production scale provides supply chain resilience, which is crucial for businesses planning large-scale or multi-phase server deployments. They also typically support long product lifecycles for enterprise parts, ensuring availability for warranty replacements and expansion for years after the initial system purchase.

Compatibility

The Samsung 32GB DDR5 5600MHz RDIMM M321R4GA3PB0-CWMXJ is designed for compatibility with modern server architectures including those from Intel (Xeon Scalable processors with DDR5 support) and AMD (EPYC 9004 Genoa series). It is compatible with a wide range of OEM systems and motherboards that accept DDR5 RDIMMs. Engineered according to strict JEDEC DDR5 standards, this memory module integrates smoothly with a wide array of modern server boards that accept 288-pin RDIMMs. Users can benefit from expanded memory capacities, enhanced I/O performance, and strengthened data integrity across various server ecosystems.