Samsung M393A2K40CB2-CWE 16GB DDR4 ECC RDIMM Server Memory

Description

The Samsung M393A2K40CB2-CWE is a 16GB DDR4 server memory module designed for enterprise platforms supporting ECC Registered DIMM (RDIMM) technology.

The CB2 module family is documented as 16GB DDR4 ECC Registered memory with a 1Rx4 organization and 1.2V operating voltage. Samsung CB2 variants are qualified in server documentation at different platform-supported speeds, including DDR4-2666 and DDR4-2933 configurations.

The module uses a 288-pin DDR4 DIMM form factor and is intended for server-class systems rather than conventional consumer desktop or laptop computers.

Because server platforms can determine the final operating frequency based on the processor and memory configuration, the actual memory speed should be verified against the target server’s qualified memory list before installation.

Key Specifications

Samsung’s CB2 16GB module is documented by Gigabyte as DDR4, 1Rx4, 1.2V, ECC Registered, 288-pin.

16GB Memory Capacity

The 16GB capacity provides a practical memory upgrade for compatible enterprise server platforms.

A 16GB RDIMM can be used to increase available system memory for workloads such as:

• Server virtualization
• Database applications
• Enterprise applications
• File and storage services
• Network infrastructure
• Web and application servers
• Cloud infrastructure
• Business applications
• General-purpose server workloads

Maximum system memory depends on the server model, processor, motherboard, BIOS/firmware, and available DIMM slots.

DDR4 Memory Technology

The M393A2K40CB2-CWE uses DDR4 SDRAM technology.

DDR4 provides improved memory efficiency and bandwidth compared with earlier DDR generations and is widely used in enterprise server platforms.

The module is specifically designed for systems that support DDR4 ECC Registered DIMMs.

ECC Error-Correcting Memory

The module uses ECC (Error-Correcting Code) memory technology.

ECC is designed to detect and correct certain memory errors, helping improve data integrity and system reliability in server environments.

This makes ECC RDIMM memory suitable for:

• Enterprise servers
• Virtualization hosts
• Database servers
• Storage systems
• Data-center infrastructure
• Cloud platforms
• Network services
• Business-critical applications

The Samsung CB2 module family is identified in server qualification documentation as ECC Registered memory.

Registered DIMM Architecture

The M393A2K40CB2-CWE uses Registered DIMM (RDIMM) architecture.

RDIMMs incorporate register/buffering circuitry for memory command and control signals and are designed for compatible server platforms.

RDIMM, UDIMM, and SODIMM memory are different technologies and are not interchangeable.

The target system must specifically support DDR4 ECC Registered DIMMs.

Single-Rank 1Rx4 Organization

The module uses a single-rank 1Rx4 organization.

Gigabyte server qualification documentation identifies the Samsung M393A2K40CB2 family as 16GB, 1Rx4, 1.2V, ECC Registered, 288-pin memory.

288-Pin DDR4 DIMM

The module uses a 288-pin DDR4 DIMM form factor.

Physical pin compatibility alone does not guarantee compatibility. The target server must also support:

• DDR4 memory
• ECC memory
• Registered DIMMs
• 16GB DIMMs
• 1Rx4 organization
• 1.2V DDR4 memory
• The appropriate memory-channel configuration

Memory Speed & Platform Configuration

The CB2 family appears in multiple server-qualified configurations with different rated speeds.

For example, Samsung’s M393A2K40CB2-CTD variant is documented as DDR4-2666, PC4-21300, CL19, ECC Registered, 1Rx4, 1.2V, while the M393A2K40CB2-CVFBQ variant is documented at DDR4-2933, 1Rx4, 1.2V, ECC Registered, CL21.

Therefore, for the exact M393A2K40CB2-CWE SKU, it is preferable not to assign a specific MT/s or CAS-latency value unless the physical module label or Samsung documentation for that exact suffix confirms it.

The server may also operate installed memory below its maximum rated speed depending on:

• Processor generation
• Integrated memory controller
• BIOS/firmware
• Number of installed DIMMs
• DIMM population
• Memory-channel configuration

Server & Data-Center Applications

The M393A2K40CB2-CWE is intended for compatible enterprise server and professional computing platforms.

Recommended applications include:

• Enterprise server upgrades
• Data-center infrastructure
• Virtualization
• Database servers
• Storage servers
• Application servers
• Cloud computing
• Network infrastructure
• Business applications
• Professional computing environments

Memory Population & Configuration

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

For predictable compatibility and performance, it is recommended to match:

• Capacity
• DDR generation
• Speed
• Rank
• Organization
• ECC configuration
• Registered architecture
• Manufacturer
• Part number

Balanced memory-channel configurations can help maximize available memory bandwidth.

Compatibility Considerations

Before purchasing or installing the Samsung M393A2K40CB2-CWE, verify that the target server supports:

• DDR4 ECC RDIMM
• 16GB DIMMs
• 1Rx4 organization
• 288-pin DDR4 DIMMs
• 1.2V DDR4 memory
• The required memory speed
• The appropriate memory-channel configuration
• The server manufacturer’s supported DIMM population rules

The module is intended for server-class platforms, not conventional desktop or laptop systems.

DDR4 Generation Compatibility

The M393A2K40CB2-CWE is a DDR4 memory module.

It is not compatible with DDR5-only platforms. DDR4 and DDR5 use different electrical characteristics and memory-module architectures.

Always verify that the target server specifically supports DDR4 ECC Registered RDIMM memory.

Important Memory Mixing Note

For reliable server operation, avoid mixing the M393A2K40CB2-CWE with unsupported memory types such as:

• DDR3 memory
• DDR5 memory
• DDR4 UDIMM
• DDR4 SODIMM
• Unsupported LRDIMM configurations
• Non-ECC memory
• Unsupported rank configurations

When expanding an existing server, using matching Samsung modules or memory listed in the server manufacturer’s qualified configuration is recommended.

Key Features & Benefits

• 16GB memory capacity
• Samsung enterprise server memory
• DDR4 SDRAM technology
• ECC error correction
• Registered DIMM architecture
• Single-rank 1Rx4 organization
• 288-pin DDR4 DIMM
• 1.2V operating voltage
• Designed for enterprise server platforms
• Suitable for virtualization workloads
• Suitable for database applications
• Suitable for storage infrastructure
• Suitable for data-center environments
• Suitable for professional server applications

Important Compatibility Note

The Samsung M393A2K40CB2-CWE is a 16GB DDR4 ECC Registered DIMM (RDIMM) and should be marketed specifically as server memory.

It is not a standard consumer DDR4 desktop UDIMM or laptop SODIMM.

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

Always verify the target system’s:

• Server model
• CPU generation
• Motherboard
• BIOS/firmware
• Maximum supported memory
• RDIMM support
• DIMM capacity
• Memory speed
• Rank and organization
• DIMM population rules

before ordering.