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Four green 288-pin DDR4 RDIMM modules in a set

NEMIX RAM

NEMIX RAM 64GB (4x16GB) DDR4 2666 ECC RDIMM 2Rx8 CL19 1.2V 288-Pin Dell PowerEdge R7425

SKU CH-3FQ4-THGYA

A 64 GB DDR4 2666 ECC RDIMM kit of four 16 GB modules at CL19 1.2 V 288-pin for Dell PowerEdge R7425

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V

Capacity 64GB 4X16GB

Show 8 more
  • 64 GB capacity supports heavy server workloads with four 16 GB modules
  • DDR4 2666 speed delivers 21300 MT/s bandwidth for responsive data handling
  • ECC registered design detects and corrects memory errors automatically
  • 2 V operation reduces power draw while maintaining CL19 latency
  • 288-pin RDIMM kit validated for Dell PowerEdge R7425 compatibility

Dell PowerEdge R7425 compatible memory kit

This 64GB kit contains four 16GB DDR4 2666MHz registered ECC RDIMMs built for the Dell PowerEdge R7425 server. It targets IT professionals who need validated, system-specific memory for production workloads. Modules use major OEM Samsung, Micron or Hynix chips and are stress tested under load.

64GB total across four single-rank modules

The four 16GB sticks fill four DIMM slots and run at PC4-21300 with CL19 latency at 1.2V. Registered buffering and ECC protect data integrity in multi-socket server environments. Capacity scales with available slots; the kit itself provides no headroom beyond its 64GB total.

2Rx8 dual-rank organisation per module

Each 16GB module is organised as 2Rx8, which affects rank population limits on the R7425 memory controller. Verify the server's maximum supported ranks per channel before installing all four modules together.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $411.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.44 per GB
Cheaper than about 61% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineDell Server/Workstation Compatible Series Memory
Model nameDell DDR4 2666 MHz ECC RDIMM Registered Server Memory
Part numberMR21300-628K4
Total capacity64 GB (4 × 16 GB)
Product type288-Pin DDR4 RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell
In the box
Included items64 GB (4 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory KIT

Other versions of this model

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Questions about this item

Will this DDR4 2666 ECC RDIMM kit run alongside my existing DDR4 modules in the PowerEdge R7425?

The kit is specified for Dell EMC PowerEdge R7425 servers at DDR4 2666 speed. Mixing modules of different speeds or ranks can prevent the system from posting or force all channels to the lowest common speed.

How can I verify the 64GB kit is detected and running at CL19 1.2V after installation?

Enter the system BIOS or iDRAC interface on boot. The memory configuration screen should show 64GB total across four slots, DDR4 2666 MT/s, registered ECC operation, and 1.2V voltage.

Does the MR21300-628K4 package include only the four 16GB RDIMMs or any extra hardware?

The package contains the four 16GB DDR4 2666 ECC RDIMM modules only. No heat spreaders, cables, tools or additional brackets are included.

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