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Green circuit board with black memory chips and gold edge connectors

Micron Technology, Inc.

Micron Technology, Inc. MTC40F2046S1RC64BR 64GB DDR5 RDIMM 6400 CL52 server RAM

SKU CH-VSN0-0DNV1 MPN MTC40F2046S1RC64BR

A 64 GB DDR5 RDIMM running at 6400 MHz with CL52 latency and 1.1 V operation for server workloads

  • Total capacity64 GB
  • Rated speedDDR5 6400 (PC5 51200)
  • CAS latencyCL52
  • Rated voltage1.1 V
  • 64 GB capacity supports large server workloads
  • DDR5 6400 speed delivers high memory bandwidth
  • CL52 latency provides responsive data access
  • 1 V operation reduces power consumption
  • 2Rx4 organisation optimises density for registered DIMM slots

Capacity and configuration

This single 64GB DDR5 RDIMM uses a 2Rx4 layout built with 16Gbit components. It delivers a large memory footprint for virtualisation hosts, database servers and high-density compute nodes that need maximum capacity per slot.

Speed and latency envelope

Rated at 6400 MT/s with CL52 timing, the module provides high throughput for memory-bound workloads while operating at the standard 1.1V DDR5 voltage. Headroom is limited to the JEDEC specification; the module does not support XMP or manual overclocking profiles.

Thermals and power profile

At the rated 1.1V the module runs within standard server thermal limits and relies on chassis airflow for cooling. No additional heatsink or active cooling is required, and power draw remains consistent with other 64GB DDR5 RDIMMs at this speed.

How it compares

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

Price $5,170.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $80.80 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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

Specifications

Product
Brand nameCrucial
Model nameMTC40F2046S1RC64BR
Part numberMTC40F2046S1RC64BR
Total capacity64 GB
Performance
Rated speedDDR5 6400 (PC5 51200)
Memory
CAS latencyCL52
Power
Rated voltage1.1 V
Size & build
Shipping weight0.45 kg
Package size25 × 25 × 25 mm

Questions about this item

Will this DDR5 6400 CL52 RDIMM downclock to match slower DDR5 modules I keep installed?

The module operates at 6400 MHz with CL52 timing at 1.10 V. When mixed with slower DDR5 DIMMs, the memory controller typically reduces speed to the lowest common denominator across all populated slots.

How can I confirm this 64 GB RDIMM is running at 6400 MHz and CL52 after installation?

Check the memory speed and latency reported in the server BIOS or UEFI, or use an OS-level tool such as dmidecode on Linux or CPU-Z on Windows to verify 6400 MT/s and CL52 values.

Does the single pack include only the 64 GB RDIMM or any extra accessories?

The single pack contains one 64 GB DDR5 RDIMM module. No cables, brackets, heatsinks or additional components are included.

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