Micron 1x 64GB DDR5-6400 RDIMM PC5-51200R Dual Rank x4 Module
Product Overview
The MTC40F2046S1RC64BD2 is a 64 GB DDR5‑6400 ECC RDIMM, dual‑rank ×4, 1.1 V module from Micron, tailored for high-throughput and reliability‑critical server environments. Its broad OEM compatibility makes it a premium yet practical upgrade choice for enterprise server platforms.
Do check your server motherboard/BIOS compatibility (particularly with high-density RDIMMs), but otherwise this is a robust pick for memory-intensive workloads.
This RAM module operates at a standard voltage of 1.1V with a CAS Latency of CL52, and is designed to allow you to run more applications simultaneously, switch between them faster, and provide a smoother computing experience.
| Technical Specifications | |
| Part No. | MTC40F2046S1RC64BD2 |
| Capacity | 64GB (1x 64GB) |
| Brand | Micron |
| Speed | DDR5-6400 - 6400MT/s - PC5-51200R |
| Voltage | 1.1V |
| Technology | DDR5-6400 |
| Error Correction | ECC |
| Signal Processing | Registered |
| Form Factor | 288-pin RDIMM |
| Ranks | Dual Rank x4 |
| CAS Latency | CL52 |
| Pieces in Kit | 1 |
Compatibility
You can verify the compatibility of this RAM module in a number of ways:
- Use the RamCity Finder to see all guaranteed compatible RAM upgrades for your brand and model system or motherboard
- Search online to see if this product is on the QVL (Qualified Vendor List) for your system or motherboard
- Contact one of our Upgrade Evangelists for an expert opinion
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Use Cases & Compatibility
Target Systems: Designed for enterprise-grade servers and workstations. Compatible with platforms like Intel Xeon and AMD EPYC (e.g., Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem).
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Primary Benefits:
High capacity density: Enables large in-system memory with fewer modules.
ECC + registered: Ensures data integrity and system stability—ideally suited for critical workloads.
x4 chip organization: Common in server memory for balanced performance and cost efficiency.