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

Crucial

Crucial MTC40F2046S1RC56BR 64GB DDR5-5600 RDIMM 2Rx4 CL46 server RAM

SKU CH-J05E-T3FJ7 MPN MTC40F2046S1RC56BR

64 GB DDR5-5600 RDIMM with ECC, CL46 latency and 1.1 V operation for servers

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • ECC supportECC
  • 64 GB capacity supports memory-intensive server workloads
  • DDR5 5600 speed delivers high bandwidth for data-centre applications
  • RDIMM form factor with ECC ensures signal integrity and error correction
  • CL46 latency at 5600 MHz balances timing and throughput
  • 1 V operating voltage reduces power draw per module

64 GB DDR5-5600 RDIMM for servers

This 64 GB DDR5-5600 RDIMM provides registered ECC memory for modern server platforms. It targets system integrators and IT departments who need reliable high-capacity modules for virtualisation, databases or compute-intensive workloads.

Install by seating the module in a DDR5 RDIMM slot

Align the notch with the slot key and press firmly until the retention clips engage; the registered design adds a clock cycle so the module must be fully seated for the memory controller to train correctly. The most common issue is a partially inserted stick that causes the system to halt at POST with no video output.

Verify DDR5 RDIMM support

Check that your motherboard or server chassis lists DDR5 RDIMM compatibility and can supply 1.1 V to the memory slots; registered DIMMs will not work in boards wired for UDIMMs or earlier DDR generations. Also confirm the platform accepts 2Rx4 organisation and CL46 timing within its qualified vendor list.

How it compares

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

Price $1,830.99
Pricier than about 85% 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 $28.61 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameCrucial
Total capacity64 GB
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
ECC supportECC
Size & build
Shipping weight0.45 kg
Package size417 × 127 × 25 mm

Questions about this item

How do I verify the module is running at DDR5-5600 with CL46 latency after installation?

Check the BIOS or a system tool such as CPU-Z; the memory should report 5600 MT/s and timings of 46-46-46 at 1.1 V.

What is included in the box and is any extra hardware required?

The package contains one 64 GB DDR5 RDIMM; no additional components are needed for installation in a compatible server slot.

Which capacity and rank configuration should I choose for a dual-channel server board?

This module provides 64 GB in a 2Rx4 organisation; populate identical modules in matched channels for optimal bandwidth.

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