Samsung M393A4K40DB3-CWE 32GB DDR4-3200 ECC RDIMM Server Memory

Description

The Samsung M393A4K40DB3-CWE is a 32GB DDR4 server memory module engineered for systems supporting ECC Registered DDR4 RDIMM memory.

Operating at 3200 MT/s, the module provides a rated memory bandwidth of PC4-25600R. Its ECC capability helps detect and correct certain memory errors, while the registered architecture buffers memory command and control signals for reliable operation in compatible enterprise server configurations.

The module uses a dual-rank 2Rx4 organization, a 288-pin DIMM form factor, and 1.2V operating voltage. Its underlying memory organization is 4G × 72, using 36 × 2G × 4 FBGA DRAM devices.

Key Specifications

Specification	Details
Manufacturer	Samsung
Part Number	M393A4K40DB3-CWE
Product Type	Server Memory Module
Capacity	32GB
Memory Technology	DDR4 SDRAM
Memory Speed	DDR4-3200
Data Rate	3200 MT/s
PC Standard	PC4-25600R
Module Type	ECC Registered DIMM (RDIMM)
ECC	Yes
Registered	Yes
Rank	Dual Rank
Organization	2Rx4
Module Organization	4G × 72
DRAM Organization	2G × 4
Number of DRAM Devices	36
DRAM Package	78-ball FBGA
Form Factor	DIMM
Pins	288-pin
Voltage	1.2V
CAS Latency	CL22
Memory Standard	JEDEC DDR4
Configuration	1 × 32GB
Application	Server / Data Center

The exact M393A4K40DB3-CWE is documented as 32GB DDR4-3200 ECC Registered RDIMM, 2Rx4, 288-pin, 1.2V.

32GB Memory Capacity

With 32GB of capacity in a single DIMM, the M393A4K40DB3-CWE provides a practical memory-density upgrade for compatible DDR4 server platforms.

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

DDR4-3200 Performance

The module operates at DDR4-3200, providing a rated data-transfer rate of 3200 MT/s and PC4-25600R memory specification.

DDR4-3200 provides high memory bandwidth for compatible server processors and is well suited to data-intensive enterprise workloads.

Actual operating speed may depend on:

Server model
Processor generation
CPU memory controller
BIOS/firmware
Number of installed DIMMs
DIMM population
Memory-channel configuration
Server manufacturer specifications

A server may operate the memory below its rated speed depending on its processor and DIMM configuration.

ECC Error Correction

The M393A4K40DB3-CWE features ECC (Error-Correcting Code) memory.

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

This makes ECC RDIMM memory particularly suitable for:

Enterprise servers
Virtualization hosts
Database servers
Storage systems
Cloud infrastructure
Data-center systems
Mission-critical applications
Professional server environments

The exact Samsung part number is identified as ECC Registered memory by multiple technical references.

Registered DIMM Architecture

The M393A4K40DB3-CWE uses Registered DIMM (RDIMM) technology.

RDIMMs incorporate a register that buffers memory command and control signals. This architecture is intended for server platforms requiring reliable operation with higher-density memory configurations.

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

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

Dual-Rank 2Rx4 Organization

The module uses a dual-rank 2Rx4 configuration.

Memory Characteristic	Specification
Capacity	32GB
Rank Configuration	2R
Data Organization	x4
Module Organization	2Rx4
Module Organization	4G × 72
DRAM Organization	2G × 4
DRAM Devices	36

The rank and organization are important when configuring multiple DIMMs because server platforms can impose specific memory-channel and DIMM population requirements.

288-Pin DDR4 DIMM

The Samsung M393A4K40DB3-CWE uses a 288-pin DDR4 DIMM form factor.

However, 288-pin construction alone does not guarantee compatibility.

The target server must also support:

DDR4 memory
ECC memory
Registered DIMMs
32GB DIMM capacity
2Rx4 organization
DDR4-3200 operation
The appropriate memory-channel configuration

Server & Data-Center Applications

The M393A4K40DB3-CWE is intended for compatible professional server platforms.

Recommended applications include:

Enterprise servers
Data-center infrastructure
Virtualization hosts
Database servers
Cloud computing
Storage servers
Application servers
Network infrastructure
High-performance business applications
Professional computing

The exact part number has also appeared in institutional server-memory specifications as a 32GB DDR4 RDIMM ECC module, confirming its use in server environments.

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
Memory technology
Speed
Rank
Organization
ECC configuration
Registered architecture
Manufacturer
Part number

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

Compatibility Considerations

Before purchasing or installing the M393A4K40DB3-CWE, verify that the target system supports:

DDR4 ECC RDIMM
32GB DIMMs
DDR4-3200
2Rx4 organization
288-pin DDR4 DIMMs
1.2V DDR4 memory
The required DIMM population configuration

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

DDR4 Generation Compatibility

The M393A4K40DB3-CWE is a DDR4 module and is not compatible with DDR5-only server platforms.

DDR4 and DDR5 use different electrical characteristics, signaling, and memory-module architectures. Therefore, the target server must specifically support DDR4 RDIMM memory.