The Micron MTC40F2046S1RC64BD2 is a 64GB DDR5-6400 ECC Registered DIMM (RDIMM) designed for modern enterprise servers, data centers, and high-performance computing platforms. It combines 64GB high-density capacity, 6400 MT/s high-speed performance, ECC reliability, registered-memory architecture, and 2Rx4 dual-rank organization, making it well suited for demanding enterprise workloads. Current server qualification records from HPE and MSI identify this exact part number as a 64GB DDR5-6400 RDIMM with 2Rx4 organization.
High-Speed DDR5-6400 Performance
The MTC40F2046S1RC64BD2 operates at 6400 MT/s, providing theoretical bandwidth of approximately 51.2 GB/s per module. This high bandwidth is beneficial for modern processors and applications that require rapid access to large datasets.
The module is classified as PC5-51200 and is designed for server platforms capable of supporting DDR5-6400 RDIMMs.
Actual operating speed depends on the server processor, BIOS, DIMM population, and platform memory configuration.
64GB High-Density Capacity
With 64GB capacity per module, the MTC40F2046S1RC64BD2 provides substantial memory density while allowing compatible servers to scale to hundreds of gigabytes or several terabytes of system memory.
It is suitable for:
- Enterprise servers
- Data-center infrastructure
- Server virtualization
- Cloud computing
- Database servers
- AI and machine-learning workloads
- Data analytics
- High-performance computing
- Virtual desktop infrastructure
- Enterprise applications
- Large-scale application hosting
The exact MPN has been documented in current HPE ProLiant Compute configurations with multiple 64GB modules operating at 6400 MT/s.
ECC Registered DIMM Architecture
The MTC40F2046S1RC64BD2 is an ECC Registered DIMM (RDIMM). ECC technology helps detect and correct certain memory errors, improving reliability and data integrity in professional server environments.
Its registered architecture is specifically intended for compatible enterprise server platforms and should not be confused with standard desktop UDIMM or laptop SO-DIMM memory.
2Rx4 Dual-Rank Organization
The exact MTC40F2046S1RC64BD2 is identified as a 2Rx4 dual-rank module. MSI’s server memory qualification documentation lists this exact Micron part as 64GB DDR5 RDIMM, 6400 MT/s, 2R×4, ECC.
The dual-rank x4 organization should be considered when checking compatibility and planning DIMM population.
DDR5 Technology
DDR5 provides substantially higher memory bandwidth than previous-generation DDR4 technology while supporting the high memory densities required by current server processors.
The 6400 MT/s data rate makes this module particularly suitable for newer server platforms designed around high-speed DDR5 memory.
Enterprise Applications
Virtualization:
The 64GB capacity provides substantial memory resources for multiple virtual machines and memory-intensive applications.
Database Servers:
High capacity, ECC functionality, and strong memory bandwidth make the module suitable for demanding database environments.
Cloud Infrastructure:
Designed for compatible high-density server configurations used in cloud and data-center environments.
AI & Data Analytics:
The combination of 64GB capacity and 6400 MT/s bandwidth can support workloads processing large datasets.
High-Performance Computing:
Suitable for compatible HPC systems requiring high-capacity, high-speed server memory.
Enterprise Server Usage
This exact Micron module has been documented in HPE ProLiant Compute DL580 Gen12 configurations, where systems were populated with multiple MTC40F2046S1RC64BD2 64GB 2-rank 6400 MT/s modules. It is also listed in MSI server compatibility documentation for Intel Sierra Forest-SP platforms at 6400 MT/s, 64GB, 2Rx4, ECC.
Compatibility
Before installing the MTC40F2046S1RC64BD2, verify that the target server supports:
- DDR5 ECC RDIMM
- 64GB DIMMs
- DDR5-6400
- 2Rx4 dual-rank organization
- 288-pin DDR5 RDIMM
- Compatible processor and memory controller
- Required DIMM population configuration
- Server maximum supported memory capacity
- Appropriate BIOS/firmware support
The module may operate at a lower speed if required by the processor or server configuration.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Micron |
| Part Number | MTC40F2046S1RC64BD2 |
| Capacity | 64GB |
| Memory Technology | DDR5 SDRAM |
| Memory Type | ECC Registered DIMM |
| Module Type | RDIMM |
| Speed | 6400 MT/s |
| Memory Standard | DDR5-6400 |
| Bandwidth | PC5-51200 |
| Rank | 2Rx4 / Dual Rank |
| ECC | Yes |
| Registered | Yes |
| Voltage | 1.1V |
| Form Factor | 288-pin RDIMM |
| Application | Enterprise Server / Data Center |
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