Specifications
MPN
MTC40F2046S1RC64BR
Capacity
64 GB
Type
DDR5 RDIMM (Registered)
Speed
DDR5-6400 / PC5-51200
Rank / Organization
2Rx4
Pins
288-pin
ECC
Yes
Voltage
1.1 V
CAS Latency
CL52
Module Family
MTC40F2046S1RC
Standards
JEDEC DDR5
Form
Low profile RDIMM
64GB DDR5 RDIMM comparison
| MPN | Brand | Speed | Rank |
|---|---|---|---|
| MTC40F2046S1RC64BR | Micron | DDR5-6400 | 2Rx4 |
| MTC40F2046S1RC56BD1 | Micron | DDR5-5600 | 2Rx4 |
| M321R8GA0BB0-CQK | Samsung | DDR5-4800 | 2Rx4 |
| MTC40F2046S1RC48BA1 | Micron | DDR5-4800 | 2Rx4 |
Use Case
The 64GB 2Rx4 DDR5-6400 module is the most common population choice for new dual-socket servers: sixteen of them fill a 1TB Xeon 6 node at full rated speed. Matching the rated 6400 MT/s rather than down-clocking a 5600 module matters most on memory-bound workloads such as vector search and LLM batching.
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