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

Crucial

Crucial MTC20F104XS1RC56BR 48GB DDR5-5600 CL46 ECC server RAM

SKU CH-Q7ET-Z26EK MPN MTC20F104XS1RC56BR

48 GB DDR5 RDIMM module running at 5600 MHz with CL46 latency and ECC error correction

  • 48 GB capacity supports larger server workloads
  • DDR5 5600 MT/s speed increases memory bandwidth
  • CL46 latency keeps response times predictable
  • ECC protection detects and corrects data errors
  • Single-rank design simplifies memory-channel population

Capacity and purpose

This 48GB DDR5 RDIMM module delivers registered ECC memory for server platforms that require data integrity at scale. It suits administrators building or expanding memory arrays in rackmount or blade systems where single-rank density simplifies population rules.

Speed and interface limits

The module operates at 5600 MHz with a CL46 latency profile under the PC5-44800 standard. Bandwidth and timing are fixed by the JEDEC specification; manual overclocking or XMP profiles are not supported on registered DIMMs, so throughput cannot exceed the rated transfer rate.

Installation notes

As a standard RDIMM the part fits any DDR5 RDIMM slot keyed for the same voltage notch. Mixing ranks or capacities across channels can prevent the system from training at 5600 MHz, so verify the platform’s qualified-vendor list before adding this module to an existing configuration.

How it compares

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

Price $358.99
Pricier than about 64% 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 weight0.08 kg
Package size178 × 102 × 51 mm

Questions about this item

Should I choose the 48GB single-rank DDR5-5600 module or look for a dual-rank alternative?

The 48GB single-rank design keeps electrical loading light, which helps stability when populating multiple slots on a server board.

What does the 5600 MHz PC5-44800 rating deliver in a live server?

It provides a peak transfer rate of 44800 MB/s at the rated 5600 MHz, assuming the platform runs the memory at that speed.

How does the DDR5 RDIMM ECC interface affect usable bandwidth?

The registered DIMM adds a clock cycle of buffering, and ECC reserves one bit per byte for error correction, so raw bandwidth is slightly reduced versus non-ECC UDIMM.

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