Samsung M321RAJA0MB2-CCP 128GB DDR5 server memory module

Description

The Samsung M321RAJA0MB2-CCP is a 128GB DDR5 server memory module designed for compatible platforms supporting ECC Registered DDR5 RDIMM memory.

With a rated data-transfer speed of 6400 MT/s, the module provides high memory bandwidth for modern server processors and memory-intensive applications. The module uses Registered DIMM architecture, which buffers command and control signals to support reliable operation in high-density server memory configurations.

The module features a dual-rank 2Rx4 organization, 288-pin DIMM form factor, and 1.10V operating voltage. Technical memory references identify the module as a 128GB DDR5-6400 ECC RDIMM using 40 FBGA DRAM packages.

The exact M321RAJA0MB2-CCP part number is also listed in ASUS server platform memory qualification documents, including the ESC8000A-E13 and RS501A-E12 platforms.

Key Specifications

The exact specifications are supported by component and memory references for this specific Samsung part number.

128GB High-Capacity Memory

The 128GB capacity provides substantial memory density from a single DIMM.

This allows compatible servers to expand system memory while potentially using fewer DIMM slots than lower-capacity modules.

It is well suited for memory-intensive workloads including:

• Server virtualization
• Database applications
• Cloud computing
• Enterprise applications
• Data analytics
• High-performance computing
• Artificial intelligence and compute infrastructure
• Storage servers
• Professional workstations

Actual maximum system memory depends on the server platform, processor, motherboard, BIOS/firmware, and DIMM population configuration.

DDR5-6400 Performance

The M321RAJA0MB2-CCP is rated at DDR5-6400, equivalent to a 6400 MT/s data-transfer rate.

The high data rate provides substantial memory bandwidth for modern server processors and demanding workloads.

Actual operating speed can vary depending on:

• Server model
• CPU memory controller
• BIOS/firmware
• Number of installed DIMMs
• DIMM population
• Memory-channel configuration
• Platform-specific memory limitations

A compatible server may operate the memory below its maximum rated speed when required by the platform.

ECC Error Correction

The M321RAJA0MB2-CCP uses ECC Registered DIMM technology.

Error-Correcting Code (ECC) memory is designed to detect and correct certain memory errors, helping improve system reliability and data integrity.

ECC memory is particularly valuable in:

• Enterprise servers
• Virtualization hosts
• Database servers
• Data-center infrastructure
• Cloud computing platforms
• Storage systems
• High-performance computing
• Mission-critical applications

Registered DIMM Architecture

This module uses Registered DIMM (RDIMM) architecture.

RDIMM technology uses a register to buffer command and control signals between the memory controller and DRAM devices. This architecture is commonly used in enterprise servers requiring high memory capacity and reliable multi-DIMM configurations.

RDIMM memory is not interchangeable with standard DDR5 UDIMM or SODIMM memory.

The target platform must explicitly support DDR5 ECC RDIMM.

Dual-Rank 2Rx4 Organization

The Samsung M321RAJA0MB2-CCP uses a 2Rx4 dual-rank organization.

The rank and organization are important when configuring multiple DIMMs because server platforms may specify particular DIMM population rules.

288-Pin DDR5 DIMM

The module uses a 288-pin DDR5 DIMM form factor.

However, physical pin compatibility alone does not guarantee system compatibility. The server must support the correct:

• DDR5 generation
• ECC memory
• RDIMM architecture
• 128GB DIMM capacity
• Rank configuration
• Memory speed
• Memory-channel configuration

Server & Data-Center Applications

The M321RAJA0MB2-CCP is designed for professional computing environments where high memory capacity and bandwidth are required.

Recommended applications include:

• Enterprise servers
• Data-center servers
• Virtualization hosts
• Database servers
• Cloud infrastructure
• AI and compute servers
• Storage systems
• Network infrastructure
• High-performance computing
• Engineering workstations
• Professional applications

ASUS server qualification documentation specifically lists Samsung M321RAJA0MB2-CCP as DDR5-6400 RDIMM 128GB 288P for supported server platforms.

Memory Population & Configuration

When installing multiple DDR5 RDIMMs, follow the server manufacturer’s recommended DIMM population sequence.

For optimal compatibility and predictable performance, consider matching:

• Capacity
• Memory type
• Speed
• Rank
• Organization
• ECC configuration
• DIMM manufacturer
• Part number

The final operating memory speed is determined by the server platform and its supported CPU/memory configuration.

Compatibility Considerations

Before purchasing or installing the M321RAJA0MB2-CCP, verify that the target system supports:

• DDR5 ECC RDIMM
• 128GB DIMMs
• DDR5-6400
• 2Rx4 memory organization
• 288-pin DDR5 DIMMs
• The required memory population configuration

The exact part number has been qualified by ASUS for certain server platforms, but qualification on one platform does not automatically mean universal compatibility with every DDR5 server.

Key Features & Benefits

• 128GB high-capacity memory
• Samsung enterprise server memory
• DDR5 technology
• 6400 MT/s data-transfer rate
• ECC error correction
• Registered DIMM architecture
• Dual-rank 2Rx4 organization
• 288-pin DIMM
• 1.10V operating voltage
• PC5-51200 / PC5-51200R
• High-density memory configuration
• Designed for enterprise server platforms
• Suitable for virtualization and database workloads
• Suitable for cloud and data-center infrastructure
• Suitable for high-performance computing

Important Compatibility Note

The Samsung M321RAJA0MB2-CCP is a 128GB DDR5 ECC RDIMM intended for compatible server platforms.

It should not be treated as a standard consumer desktop DDR5 memory module.

RDIMM, UDIMM, and SODIMM technologies are different and generally cannot be substituted for one another.

Always verify the target server’s:

• Server model
• CPU generation
• Motherboard
• BIOS/firmware
• Maximum supported memory
• RDIMM support
• DIMM population rules
• Supported memory frequency
• Rank/organization requirements

before ordering.