Samsung M321R4GA3BB0-CQK 32GB DDR5 server memory module
The Samsung M321R4GA3BB0-CQK is a 32GB DDR5-4800 ECC Registered DIMM (RDIMM) designed for enterprise servers, data-center infrastructure, and professional workstation platforms.
Featuring 32GB capacity, DDR5-4800 performance, ECC error correction, dual-rank 2Rx8 organization, 288-pin construction, 1.1V operation, and CL40 latency, this Samsung server memory module provides reliable, high-bandwidth memory for demanding professional workloads.
Description
The Samsung M321R4GA3BB0-CQK is a 32GB DDR5 server memory module engineered for systems supporting ECC Registered DDR5 RDIMM memory.
Operating at 4800 MT/s, the module delivers a rated memory bandwidth of PC5-38400. Its ECC capability provides error detection and correction, while the registered architecture buffers memory control signals to support reliable operation in compatible server memory configurations.
The module uses a dual-rank 2Rx8 organization, a 288-pin DIMM form factor, and 1.1V operating voltage. The exact part number is identified as a Samsung DDR5-4800B 4Gx80 RDIMM 2Rx8 32GB module.
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | Samsung |
| Part Number | M321R4GA3BB0-CQK |
| Product Type | Server Memory Module |
| Capacity | 32GB |
| Memory Technology | DDR5 SDRAM |
| Memory Speed | DDR5-4800 |
| Data Rate | 4800 MT/s |
| PC Standard | PC5-38400 |
| Module Type | ECC Registered DIMM (RDIMM) |
| ECC | Yes |
| Registered | Yes |
| Rank | Dual Rank |
| Organization | 2Rx8 |
| DRAM Organization | 4G × 80 / x8 architecture |
| Form Factor | DIMM |
| Pins | 288-pin |
| Voltage | 1.1V |
| CAS Latency | CL40 |
| Memory Standard | JEDEC DDR5 |
| Configuration | 1 × 32GB |
| Application | Server / Workstation |
The exact part number is consistently identified as 32GB DDR5-4800 ECC Registered RDIMM, 2Rx8, 288-pin, 1.1V.
32GB Memory Capacity
The 32GB capacity provides a substantial memory upgrade for compatible server platforms.
A single 32GB module can increase available system memory while leaving additional DIMM slots available for future expansion, depending on the server’s memory architecture and population requirements.
The module is suitable for memory-intensive workloads such as:
- Server virtualization
- Database applications
- Enterprise software
- Cloud infrastructure
- Data analytics
- Storage systems
- Application servers
- Professional workstations
- High-performance computing
Maximum system memory depends on the server model, processor, motherboard, BIOS/firmware, and supported DIMM population.
DDR5-4800 Performance
The M321R4GA3BB0-CQK operates at DDR5-4800, providing a rated data-transfer rate of 4800 MT/s and PC5-38400 memory bandwidth.
DDR5-4800 provides significantly increased memory bandwidth compared with earlier DDR4 server-memory generations and is designed for modern server platforms.
Actual operating speed may depend on:
- Server model
- Processor memory controller
- BIOS/firmware
- Number of installed DIMMs
- DIMM population
- Memory-channel configuration
- CPU generation
- Server manufacturer specifications
A server may operate the module at a lower supported speed depending on its hardware configuration.
ECC Error Correction
The Samsung M321R4GA3BB0-CQK features ECC (Error-Correcting Code) memory technology.
ECC is designed to detect and correct certain memory errors, helping improve data integrity and system reliability in professional computing environments.
This makes ECC RDIMM memory appropriate for:
- Enterprise servers
- Virtualization hosts
- Database servers
- Storage servers
- Cloud infrastructure
- Data-center systems
- Mission-critical applications
- Professional workstations
The exact M321R4GA3BB0-CQK is listed as ECC Registered memory by multiple technical sources.
Registered DIMM Architecture
The module uses Registered DIMM (RDIMM) technology.
RDIMMs incorporate a register that buffers memory command and control signals, allowing supported server platforms to handle higher-density memory configurations.
RDIMM, UDIMM, and SODIMM memory are different technologies and are not interchangeable.
The target system must specifically support DDR5 ECC Registered RDIMM memory.
Dual-Rank 2Rx8 Organization
The M321R4GA3BB0-CQK uses a 2Rx8 dual-rank configuration.
| Memory Characteristic | Specification |
|---|---|
| Capacity | 32GB |
| Rank Configuration | 2R |
| Data Organization | x8 |
| Module Organization | 2Rx8 |
| Memory Technology | DDR5 |
| ECC | Yes |
| Registered | Yes |
Rank configuration can be important when installing multiple DIMMs because server platforms may specify particular population rules for each memory channel.
288-Pin DDR5 DIMM
The Samsung M321R4GA3BB0-CQK uses a 288-pin DDR5 DIMM form factor.
However, a 288-pin DDR5 DIMM is not automatically compatible with every DDR5 system.
The target server must also support:
- DDR5 memory
- ECC
- Registered DIMMs
- 32GB DIMM capacity
- 2Rx8 organization
- DDR5-4800 operation
- The appropriate memory population configuration
Server & Workstation Applications
The M321R4GA3BB0-CQK is intended for compatible server and professional workstation platforms.
Recommended applications include:
- Enterprise servers
- Data-center infrastructure
- Virtualization hosts
- Database servers
- Cloud computing
- Storage systems
- Application servers
- Network infrastructure
- Engineering workstations
- Professional computing
- High-performance workloads
Some server-memory references specifically identify compatibility with modern enterprise platforms including Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Supermicro, ASUS, and AMD EPYC/Intel Xeon-based systems. Compatibility should always be confirmed against the exact server configuration before purchase.
Memory Population & Configuration
For systems using multiple DIMMs, installation should follow the server manufacturer’s recommended memory population sequence.
For best compatibility and predictable performance, matching modules by:
- Capacity
- Speed
- ECC type
- Registered architecture
- Rank
- Organization
- Manufacturer
- Part number
is recommended.
The actual memory frequency is determined by the server platform, processor, BIOS/firmware, and DIMM population.
Compatibility Considerations
Before purchasing or installing the M321R4GA3BB0-CQK, verify that the target system supports:
- DDR5 ECC RDIMM
- 32GB DIMMs
- DDR5-4800
- 2Rx8 organization
- 288-pin DDR5 DIMMs
- 1.1V DDR5 memory
- The required DIMM population configuration
This module should not be installed in systems designed exclusively for DDR5 UDIMM or SODIMM memory.
Key Features & Benefits
- 32GB memory capacity
- Samsung server-grade DDR5 memory
- DDR5-4800 performance
- 4800 MT/s data rate
- PC5-38400 bandwidth
- ECC error correction
- Registered DIMM architecture
- Dual-rank 2Rx8 organization
- 288-pin DIMM
- 1.1V operating voltage
- CL40 latency
- Designed for enterprise server environments
- Suitable for virtualization and database workloads
- Suitable for data-center infrastructure
- Suitable for professional workstations
- High-density server memory configuration
Important Compatibility Note
The Samsung M321R4GA3BB0-CQK is a DDR5 ECC Registered DIMM (RDIMM) and should be marketed specifically as server/workstation memory.
It is not a standard consumer desktop DDR5 UDIMM.
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 population rules
- Supported memory speed
- Rank and organization requirements
before ordering.
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