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Green rectangular DDR5 RDIMM module with gold edge connectors and black memory chips on both sides

Micron Technology, Inc.

Micron Technology, Inc. MTC40F2046S1RC64BH1 64GB DDR5 RDIMM 6400MT/s CL52 x80 server RAM

SKU CH-S93V-91Z68 MPN MTC40F2046S1RC64BH1

64 GB DDR5 RDIMM with ECC and data retention, running at 6400 MT/s CL52 on a 1.1 V x80 bus

  • 64 GB capacity supports large memory configurations
  • 6400 MT/s data rate enables high-throughput workloads
  • DDR5 architecture operates at 1.1 V for reduced power draw
  • x80 bus width with ECC strengthens data integrity
  • CL52 latency at 3200 MHz clock balances speed and stability

Capacity and Form Factor

This is a 64GB DDR5 RDIMM built for registered server platforms. The module uses a 288-pin interface and an x80 bus width with ECC and DR support. It targets administrators expanding memory in compatible enterprise systems.

Platform Requirements

Verify that your server motherboard accepts DDR5 RDIMMs with an x80 bus width and registered ECC operation. The memory controller must support the stated 6400MT/s data rate and CL52 latency at 1.1 volts. Confirm the DIMM slot count and maximum capacity per channel before ordering.

Included Benefits

The module ships as a single 64GB stick using 16Gb die revision H, so no extra cables, brackets or software licences are bundled. The registered design and on-die ECC improve signal integrity and data reliability for continuous workloads.

How it compares

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

Price $3,960.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Size & build
Shipping weight0.45 kg
Package size178 × 102 × 51 mm

Questions about this item

Does the 64GB DDR5 RDIMM ship as a single module or a kit, and are any brackets or cables required?

This is a single 64GB 288-pin DDR5 RDIMM. No brackets, cables or extra components are included; install directly into a compatible server DIMM slot.

The part shows 6400MT/s and CL52 — how do I decide between this and a lower-latency or lower-speed variant?

Choose this module when the platform specifies 6400MT/s CL52 registered ECC memory with x80 bus width and 1.1V operation; match the exact speed, latency and voltage the system requires.

What does the 6400MT/s rating mean for actual throughput once the RDIMM is installed in a server?

6400MT/s indicates 6400 million transfers per second on the DDR5 interface; real-world throughput depends on the memory controller, channel count and workload.

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