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Green PCB 288-pin DDR5 RDIMM module with black heatspreader and silver label

Micron Technology, Inc.

Micron Technology, Inc. MTC40F2047S1RC56BB2R 128GB DDR5 RDIMM 5600 CL46 server RAM

SKU CH-VTNV-SHQVZ MPN MTC40F2047S1RC56BB2R

128 GB DDR5 RDIMM with ECC, dual-rank 2Rx4 organisation, running at 5600 MHz CL46

  • Total capacity128 GB
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Product type288-Pin PC RAM
  • 128 GB capacity supports large-scale virtualisation and in-memory databases
  • DDR5 5600 MT/s delivers 44800 MB/s peak bandwidth for data-intensive workloads
  • CL46 CAS latency provides responsive timing for consistent server performance
  • Dual-rank 2Rx4 organisation with 32 Gbit density maximises DIMM capacity per slot
  • ECC registered RDIMM form factor ensures signal integrity and error correction in multi-DIMM configurations

Micron 128GB DDR5-5600 RDIMM

This Micron DDR5 registered DIMM delivers 128GB of ECC server memory in a single module. It runs at 5600MHz with CL46 latency and uses a 2Rx4 dual-rank organisation based on 32Gbit DRAM. The 288-pin form factor fits standard DDR5 RDIMM slots in compatible platforms.

Installation notes for registered ECC modules

Installation requires a motherboard that supports DDR5 RDIMM with ECC; the module will not function in desktop UDIMM slots or systems lacking registered-buffer support. Align the key notch with the slot, press firmly until the retention clips engage, and verify the BIOS detects the full 128GB capacity. Dual-rank density can limit the number of modules per channel on some server boards.

Suited for memory-heavy server workloads

The 128GB capacity and ECC protection suit virtualisation hosts, database nodes and compute clusters that need maximum density per slot. Environments requiring registered DDR5 but lower per-module capacity or higher speed bins should evaluate alternative modules. Systems without DDR5 RDIMM support cannot use this product.

How it compares

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

Price $5,173.99
Pricier than about 90% of the 6,523 comparable items (median $188.99).
Total capacity 128 GB
Higher than about 90% of the 6,064 comparable items (median 32 GB).
Price per GB $40.42 per GB
Pricier than about 90% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameMicron
Part numberMTC40F2047S1RC56BB2R
Total capacity128 GB
Product type288-Pin PC RAM
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
Size & build
Shipping weight0.45 kg
Package size152 × 102 × 25 mm

Questions about this item

How can I verify the module is running at 5600 MT/s with CL46 after installation?

Enter the server BIOS or UEFI and confirm the memory speed reads 5600 MT/s and CAS latency shows CL46; the module is a 128 GB DDR5 RDIMM with 2Rx4 organisation.

What ships with the MTC40F2047S1RC56BB2R and what must be sourced separately?

The box contains one 128 GB DDR5 5600 CL46 RDIMM in a 288-pin form factor; additional modules, a compatible DDR5 server platform and any required cooling are not included.

Which capacity and rank option should I choose for a dual-rank 128 GB DDR5 5600 CL46 configuration?

This single part number MTC40F2047S1RC56BB2R delivers exactly 128 GB in a 2Rx4 dual-rank layout at 5600 MT/s CL46; select it when that specification matches your platform's qualified-vendor list.

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