Samsung M393A4G40AB3-CWE 32GB DDR4-3200 ECC RDIMM Server Memory

Description

The Samsung M393A4G40AB3-CWE is a 32GB DDR4-3200 ECC Registered DIMM (RDIMM) designed for enterprise servers, data-center infrastructure, and professional computing platforms.

Featuring 32GB capacity, DDR4-3200 performance, ECC error correction, single-rank 1Rx4 organization, 288-pin construction, 1.2V operation, and CL22 latency, this Samsung server memory module provides reliable, high-bandwidth memory for demanding server workloads.

Detailed Product Description

The Samsung M393A4G40AB3-CWE is a 32GB DDR4 server memory module engineered for systems supporting ECC Registered DDR4 RDIMM memory.

Operating at DDR4-3200, the module provides a rated data-transfer rate of 3200 MT/s and a PC4-25600 memory specification. 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 single-rank 1Rx4 organization, a 288-pin DIMM form factor, and 1.2V operating voltage. Samsung’s technical documentation identifies the component composition as (4G × 4) × 18.

Key Specifications

Specification	Details
Manufacturer	Samsung
Part Number	M393A4G40AB3-CWE
Product Type	Server Memory Module
Capacity	32GB
Memory Technology	DDR4 SDRAM
Memory Speed	DDR4-3200
Data Rate	3200 MT/s
PC Standard	PC4-25600
Module Type	ECC Registered DIMM (RDIMM)
ECC	Yes
Registered	Yes
Rank	Single Rank
Organization	1Rx4
Component Composition	(4G × 4) × 18
Form Factor	DIMM / RDIMM
Pins	288-pin
Voltage	1.2V
CAS Latency	CL22
Memory Standard	JEDEC DDR4
Configuration	1 × 32GB
Application	Server / Data Center

The exact Samsung specification identifies this module as 32GB DDR4 RDIMM, 1Rx4, 3200 Mbps, 1.2V, 288-pin. Independent listings also identify ECC Registered operation and CL22.

32GB Memory Capacity

With 32GB of memory in a single DIMM, the M393A4G40AB3-CWE provides a substantial memory-density upgrade for compatible DDR4 server platforms.

It can be used to increase available system RAM while preserving additional DIMM slots 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 system memory depends on the server model, processor, motherboard, BIOS/firmware, and DIMM population configuration.

DDR4-3200 Performance

The M393A4G40AB3-CWE operates at DDR4-3200, providing a rated transfer rate of 3200 MT/s.

Its 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 speed and bandwidth depend on the server platform and may be affected by:

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 its rated DDR4-3200 speed depending on processor and system configuration.

ECC Error-Correcting Memory

The M393A4G40AB3-CWE features ECC (Error-Correcting Code) memory.

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

This makes the module suitable for:

Enterprise servers
Virtualization hosts
Database servers
Storage systems
Cloud infrastructure
Data-center environments
Network infrastructure
Professional computing

The exact part is identified in server QVL documentation as ECC Registered DDR4 memory.

Registered DIMM Architecture

The M393A4G40AB3-CWE uses Registered DIMM (RDIMM) architecture.

RDIMMs incorporate register/buffering circuitry for memory command and control signals and are 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 RDIMM memory.

Single-Rank 1Rx4 Organization

The module uses a single-rank 1Rx4 configuration.

Memory Characteristic	Specification
Capacity	32GB
Rank Configuration	1R
Data Organization	x4
Module Organization	1Rx4
Component Composition	(4G × 4) × 18
ECC	Yes
Registered	Yes

The exact Samsung documentation identifies the module as 1R × 4, while Samsung-compatible listings identify it as 1Rx4 single rank.

288-Pin DDR4 DIMM

The M393A4G40AB3-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
32GB DIMMs
DDR4-3200 operation
1Rx4 organization
1.2V DDR4 memory
The required memory-channel configuration

Server & Data-Center Applications

The M393A4G40AB3-CWE is designed 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
High-performance business applications
Professional computing environments

The exact Samsung module is also listed in a Gigabyte server QVL as a 32GB Samsung DDR4, 1Rx4, 3200MHz, 1.2V, ECC Registered, 288-pin module.

Memory Population & Configuration

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

For best memory-channel performance, DIMMs should be populated according to the server manufacturer’s specified channel and slot configuration.

Compatibility Considerations

Before purchasing or installing the Samsung M393A4G40AB3-CWE, verify that the target server supports:

DDR4 ECC RDIMM
32GB DIMMs
DDR4-3200
1Rx4 organization
288-pin DDR4 DIMMs
1.2V DDR4 memory
The appropriate memory-channel configuration
The server manufacturer’s supported DIMM population rules

The module is intended for server and workstation platforms, rather than conventional desktop or laptop systems.

DDR4 Generation Compatibility

The M393A4G40AB3-CWE is a DDR4 module.

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

The target system must specifically support DDR4 ECC Registered RDIMM memory.

Important Memory Mixing Note

For reliable server operation, avoid mixing the M393A4G40AB3-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.