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Sixteen green DDR4 RDIMM modules in a row

NEMIX RAM

NEMIX RAM 256GB (16x16GB) DDR4 2666 PC4-21300 ECC RDIMM 2Rx8 CL19 1.2V 288-Pin for Dell PowerEdge R7425

SKU CH-77T9-4576K

256 GB DDR4-2666 ECC registered server kit with sixteen 16 GB modules built for the Dell PowerEdge R7425

  • Total capacity256 GB (16 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V

Capacity 256GB 16X16GB

Show 8 more
  • 256 GB total capacity across 16 modules for large-scale server workloads
  • DDR4 2666 speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects memory errors automatically
  • 2 V operation reduces power draw in dense configurations
  • Validated for Dell PowerEdge R7425 ensuring drop-in compatibility

256GB DDR4 2666 ECC RDIMM Kit for Dell R7425

This 256GB memory kit contains sixteen 16GB DDR4 2666 registered DIMMs with ECC and a CL19 latency. It operates at 1.2V using 288-pin 2Rx8 modules built with major OEM chips. The kit is configured specifically for the Dell EMC PowerEdge R7425 server platform.

Suited for R7425 capacity expansion.

IT administrators scaling a PowerEdge R7425 to 256GB will match the server's registered ECC requirement exactly. Workstations or desktops that accept only unbuffered non-ECC memory cannot use these registered modules. Builders needing a different capacity or speed grade should select another kit.

2Rx8 registered ECC architecture decides

The 2Rx8 registered ECC design is the single specification that determines whether this kit functions in the target server. The PowerEdge R7425 memory controller requires registered modules with error correction; unbuffered or non-ECC alternatives will not post. Verify the server documentation calls for 2Rx8 RDIMMs before purchase.

How it compares

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

Price $1,650.99
Pricier than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (16 × 16 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.45 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 numberMR21300-628K16
Total capacity256 GB (16 × 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 items256 GB (16 × 16 GB) DDR4 2666 MHz PC4-21300 1Rx8 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory

Other versions of this model

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Questions about this item

Does this 256 GB kit require a Dell PowerEdge R7425 to function?

Yes, the kit is validated for the Dell EMC PowerEdge R7425 server and uses 288-pin DDR4 RDIMM modules that fit that platform's memory slots.

Can I mix these 2666 MT/s RDIMMs with slower DDR4 modules already installed in the server?

All modules will run at the speed of the slowest installed kit, so mixing with lower-speed DDR4 RDIMMs reduces overall memory throughput.

How can I verify the 256 GB kit is running at 2666 MT/s with ECC active after installation?

Check the system BIOS or UEFI memory information screen; it should report 256 GB total, 2666 MT/s operating speed, and ECC enabled for each of the 16 modules.

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