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Green rectangular DDR5 server memory module with gold edge connector and black chips

Micron Technology, Inc.

Micron Technology, Inc. MTC40F2047S1RC64BB1R 128GB DDR5-6400 ECC RDIMM server RAM

SKU CH-GZMS-Y0144

High-capacity 128GB DDR5-6400 ECC RDIMM for demanding server workloads

  • 128 GB capacity supports large datasets
  • DDR5-6400 speed accelerates data throughput
  • ECC protection detects and corrects memory errors
  • Registered design stabilises signal integrity
  • Micron quality ensures reliable server operation

What this module is

This Micron MTC40F2047S1RC64BB1R is a 128GB DDR5-6400 ECC RDIMM built for server platforms that require registered memory with error correction. It is designed for administrators and integrators deploying high-capacity memory in multi-socket systems running virtualisation, database or compute workloads.

What to confirm before ordering

Verify that your motherboard and processor support DDR5 RDIMMs at this density and that the memory controller accepts 128GB modules per slot. The platform must also enable ECC functionality; consumer desktop boards and laptops that only accept unbuffered DIMMs cannot use this module.

Behaviour under sustained load

As a registered ECC DIMM, the module maintains data integrity through error detection and correction during continuous operation. The register buffers address and command signals, reducing electrical load on the memory controller when all channels are populated, which helps preserve signal quality at the rated 6400 MT/s transfer rate over long periods.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $5,152.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).

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Specifications

No published specifications for this item yet.

Questions about this item

What is included with the MTC40F2047S1RC64BB1R 128GB DDR5-6400 ECC RDIMM and do I need extra parts?

The module ships as a single 128GB DDR5-6400 ECC RDIMM. No cables, brackets or additional components are supplied; install it directly into a compatible server DIMM slot.

How do I decide between the MTC40F2047S1RC64BB1R and MTC40F2047S1RC64BB1 part numbers?

Both numbers refer to the same 128GB DDR5-6400 ECC RDIMM specification; choose whichever MPN your procurement system or vendor listing shows.

What does the 6400 MT/s rating mean once the DIMM is installed in a server?

The memory runs at 6400 MT/s when the platform supports that speed; actual throughput depends on the CPU memory controller and BIOS configuration.

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