Samsung M393A8K40DB3-CWE 64GB DDR4-3200 ECC RDIMM Server Memory

Description

The Samsung M393A8K40DB3-CWE is a 64GB DDR4 server memory module engineered for systems supporting ECC Registered DDR4 RDIMM technology.

Operating at DDR4-3200, the module provides a rated data-transfer rate of 3200 MT/s and corresponds to the PC4-25600 memory standard. Its ECC capability helps detect and correct certain memory errors, while the registered architecture provides buffered command and control signaling for compatible enterprise server configurations.

The module uses a dual-rank 2Rx4 organization, a 288-pin DDR4 DIMM form factor, and 1.2V operating voltage. Server qualification documentation identifies the M393A8K40DB3-CWEBQ variant as a 64GB Samsung DDR4-3200 ECC Registered DIMM, 2Rx4, CL22.

Key Specifications

The corresponding Samsung variant is listed in Gigabyte’s server memory qualification documentation with 64GB capacity, 2Rx4 organization, 1.2V, 3200MHz, ECC Registered operation, CL22, and 288-pin construction.

64GB Memory Capacity

With 64GB of memory in a single DIMM, the M393A8K40DB3-CWE provides a high-density memory upgrade for compatible DDR4 enterprise servers.

The high capacity can help increase available system memory while allowing additional DIMM slots to remain available for future expansion, subject to the server’s memory architecture and population requirements.

Suitable workloads include:

• Server virtualization
• Database applications
• Enterprise applications
• Cloud infrastructure
• Storage systems
• Application servers
• Data analytics
• Network infrastructure
• Professional computing
• General-purpose server workloads

The maximum supported memory depends on the server model, processor, motherboard, BIOS/firmware, and DIMM population configuration.

DDR4-3200 Performance

The M393A8K40DB3-CWE operates at DDR4-3200, providing a rated transfer rate of 3200 MT/s.

The PC4-25600 designation corresponds to a theoretical peak bandwidth of approximately 25.6 GB/s per 64-bit memory channel under ideal conditions.

Actual operating performance can vary depending on:

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

A compatible server may operate the memory below DDR4-3200 depending on its processor and memory configuration.

ECC Error-Correcting Memory

The M393A8K40DB3-CWE is designed as ECC server memory.

ECC technology helps detect and correct certain types of memory errors, improving data integrity and system reliability. This is particularly important in enterprise environments where servers are expected to operate continuously.

Recommended applications include:

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

The qualified Samsung variant is explicitly identified as ECC Registered memory.

Registered DIMM Architecture

The module uses Registered DIMM (RDIMM) technology.

RDIMM memory incorporates register/buffering circuitry for memory command and control signals and is designed for compatible enterprise server platforms.

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

The target system must specifically support DDR4 ECC Registered DIMMs.

Dual-Rank 2Rx4 Organization

The module uses a dual-rank 2Rx4 configuration.

The 2Rx4 organization is commonly used in enterprise DDR4 server memory configurations. The Samsung variant is documented as 64GB, 2Rx4, ECC Registered.

288-Pin DDR4 DIMM

The M393A8K40DB3-CWE uses a 288-pin DDR4 DIMM form factor.

Physical pin compatibility alone is not sufficient. The target server must also support:

• DDR4 memory
• ECC memory
• Registered DIMMs
• 64GB DIMMs
• DDR4-3200 operation
• 2Rx4 organization
• 1.2V DDR4 memory
• The required memory-channel configuration

Server & Data-Center Applications

The M393A8K40DB3-CWE is intended for compatible enterprise server and professional computing platforms.

Recommended applications include:

• Enterprise server upgrades
• Data-center infrastructure
• Virtualization hosts
• Database servers
• Storage servers
• Application servers
• Cloud computing
• Network infrastructure
• Data analytics
• High-performance business applications

Gigabyte’s server qualification documentation includes the Samsung M393A8K40DB3-CWEBQ as a qualified 64GB DDR4-3200 ECC Registered module.

Memory Population & Configuration

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

For predictable compatibility and performance, matching modules by the following characteristics is recommended:

• 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 M393A8K40DB3-CWE, verify that the target server supports:

• DDR4 ECC RDIMM
• 64GB DIMMs
• DDR4-3200
• 2Rx4 organization
• 288-pin DDR4 DIMMs
• 1.2V DDR4 memory
• The required memory-channel configuration
• The server manufacturer’s DIMM population rules

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

DDR4 Generation Compatibility

The M393A8K40DB3-CWE is a DDR4 memory module.

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

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

Important Memory Mixing Note

For reliable server operation, avoid mixing the M393A8K40DB3-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

• 64GB memory capacity
• Samsung enterprise server memory
• DDR4 technology
• DDR4-3200 performance
• 3200 MT/s data rate
• PC4-25600
• ECC error correction
• Registered DIMM architecture
• Dual-rank 2Rx4 organization
• 288-pin DDR4 DIMM
• 1.2V operating voltage
• CL22 latency
• Designed for enterprise server platforms
• Suitable for virtualization workloads
• Suitable for database applications
• Suitable for data-center infrastructure
• Suitable for cloud and storage environments
• Suitable for professional server applications

Important Compatibility Note

The Samsung M393A8K40DB3-CWE is a 64GB 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.