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Green printed circuit board with black memory chips and gold edge connectors

Crucial

Crucial MTC40F2046S1RC56BD2R 64GB DDR5 RDIMM 2Rx4 5600 CL46 server RAM

SKU CH-KRCB-S8RF8 MPN MTC40F2046S1RC56BD2R

64 GB DDR5 RDIMM running at 5600 MHz with CL46 latency for server workloads

  • Total capacity64 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • 64 GB capacity supports large server workloads
  • DDR5 5600 speed delivers high memory bandwidth
  • Registered DIMM design improves signal integrity
  • CL46 latency enables responsive data access
  • 2Rx4 organisation increases memory density

Server DDR5 RDIMM 64 GB

This is a Crucial 64 GB DDR5 RDIMM operating at 5600 MHz with CL46 latency. The module uses a 2Rx4 organisation based on 16 Gbit density and is supplied as a single pack. It is built for registered ECC memory channels in server platforms.

Suited to registered ECC channels

This module suits administrators expanding or repairing DDR5 server memory subsystems that accept registered DIMMs. It is not for desktop or workstation boards that require unbuffered UDIMMs or for any system that does not support DDR5 registered memory.

Speed DDR5 5600 CL46

The decisive specification is the DDR5 5600 MT/s data rate with CL46 timing, which must match the memory controller configuration of the target platform. Verify that the server qualifies this exact speed and latency before installation.

How it compares

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

Price $3,435.99
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 $53.69 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
Model nameMTC40F2046S1RC56BD2R
Part numberMTC40F2046S1RC56BD2R
Total capacity64 GB
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
Size & build
Shipping weight0.45 kg
Package size25 × 25 × 25 mm

Questions about this item

What motherboard slot does this DDR5 RDIMM require?

The module fits a DDR5 RDIMM socket on a server or workstation motherboard that supports registered ECC memory.

Can I add this 5600 CL46 stick to a system that already runs DDR5 at 4800?

The module will operate at the lowest common speed and timing, so it will downshift to match the existing 4800 configuration.

How do I confirm the module is running at 5600 MT/s after installation?

Check the memory speed reported in BIOS or by a tool such as dmidecode; it should show 5600 MT/s and CL46 timings.

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