Micron DDR5 RDIMM 128GB 2Rx4 6400MT/s CL52 ECC Registered Server Memory (32Gb Die)
PRODUCT DESCRIPTION
Micron DDR5 RDIMM 128GB 2Rx4 6400MT/s CL52 ECC Registered Server Memory MTC40F2047S1RC64BB1R - 3 Years Warranty
128GB Without 3DS Stacking
Micron builds this 128GB dual-rank RDIMM from its 32Gb monolithic DDR5 die, avoiding the TSV (3DS) stacking used in many other 128GB modules.
Efficiency at Scale
Micron rates its 32Gb-die 128GB RDIMM at over 45% better bit density, up to 22% better energy efficiency and up to 16% lower latency than competing 3DS TSV modules.
DDR5-6400 for AI and Databases
Runs at 6400 MT/s, CL52 for memory-hungry in-memory databases, virtualisation and AI workloads.
Micron DDR5 RDIMM 128GB Datasheet — Technical Specifications
General
| Product Name | Micron DDR5 RDIMM 128GB |
| Part Number | MTC40F2047S1RC64BB1R |
| Module Type | DDR5 Registered DIMM (RDIMM), ECC |
| Capacity | 128GB |
| Packaging | Single pack |
| Warranty | 3 years |
Memory
| Speed | DDR5-6400 (6400 MT/s, PC5-51200) |
| CAS Latency | CL52 |
| Rank / Organisation | Dual rank, 2Rx4 |
| DRAM Die | 32Gb monolithic DDR5 die (Micron 1-beta process) |
| Error Correction | ECC (registered) |
| Voltage | VDD / VDDQ 1.1 V |
Physical
| Form Factor | 288-pin DIMM |
| On-module | Power management IC (PMIC) and SPD hub |
Compatibility & Applications
Typical Use
Memory upgrades and new builds for DDR5 servers and workstations running virtualisation, databases, analytics and AI inference.
Platform Notes
RDIMMs work only in systems that support registered DDR5 memory; they cannot be used in boards built for unbuffered (UDIMM) desktop memory. Check your server vendor's memory configuration guide for supported speeds and population rules.
Selection Tip
Populate every memory channel evenly with identical modules for best bandwidth.
Tested Platform
Micron has published 128GB DDR5-6400 results on 5th Gen AMD EPYC servers.
Package Contents & Micron Ordering Information
In the Box
1 x Micron DDR5 RDIMM 128GB module (single pack).
Micron Data Center Memory & SSDs at SourceIT
| Model | Key feature |
| MTC40F2046S1RC64BH1 | DDR5 RDIMM 64GB 2Rx4 6400 MT/s CL52 (tray) |
| MTC40F2047S1RC64BB1R (this listing) | DDR5 RDIMM 128GB 2Rx4 6400 MT/s CL52, 32Gb die |
| MTFDDAK480TGA-1BC1ZABYYR | 5400 PRO 480GB SATA 2.5" 7mm |
| MTFDDAK1T9TGA-1BC1ZABYYR | 5400 PRO 1.92TB SATA 2.5" 7mm |
| MTFDKBA480TFR-1BC15ABYYR | 7450 PRO 480GB NVMe Gen4 M.2 2280, TCG Opal |
| MTFDKBA960TFR-1BC15ABYYR | 7450 PRO 960GB NVMe Gen4 M.2 2280, TCG Opal |
| MTFDLAL3T8THG-1BP1DFCYYR | 7600 PRO 3.84TB NVMe Gen5 U.2 15mm |
| MTFDLAL15T3THG-1BP1DFCYYR | 7600 PRO 15.36TB NVMe Gen5 U.2 15mm |
| MTFDLBQ7T6THA-1BK1DABYYR | 9550 PRO 7.68TB NVMe Gen5 E3.S 7.5mm |
Official Micron Videos
Micron DDR5: Next-Generation Memory Transforming Data into Insight (official Micron Technology channel)
Micron DDR5: How It Delivers More Than 2x Effective Bandwidth (official Micron Technology channel)
Datasheet & Downloads
| RDIMM product family | Micron DDR5 RDIMM on micron.com |
| 128GB product brief | Micron 128GB DDR5 RDIMM Product Brief (PDF) |
Frequently Asked Questions — Micron DDR5 RDIMM 128GB
Is this ECC memory?
Yes. It is a registered ECC DDR5 module (RDIMM).
Is it a 3DS module?
No. It uses Micron's 32Gb monolithic DRAM die.
Will it work in a desktop PC?
No. RDIMMs need a server or workstation platform that supports registered DDR5.
What warranty do I get?
3 years.
Do I get a GST invoice?
Yes. Supplied by SourceIT in Singapore with a GST invoice.
