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Green rectangular DDR4 RDIMM module with black memory chips and gold edge connectors, no heat spreader

NEMIX RAM

NEMIX RAM 128GB 1x128GB DDR4 2666 ECC RDIMM CL19 288-pin memory upgrade

SKU CH-W3QM-7B7KX

A 128GB DDR4 2666 ECC registered DIMM for Micron server and workstation upgrades

  • Total capacity128 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeRegistered
  • Rated voltage1.2 V
  • 128 GB single-module capacity simplifies server density upgrades
  • DDR4 2666 speed with PC4-21300 bandwidth supports demanding workloads
  • ECC registered design detects and corrects data errors automatically
  • CL19 latency at 1.2 V balances responsiveness and power efficiency
  • 288-pin 4Rx4 RDIMM form factor fits compatible Micron server platforms

Capacity and Role

This NEMIX RAM module provides 128GB of DDR4 memory in a single registered DIMM. It targets servers and workstations that require error-correcting code protection for data integrity. The 4Rx4 organisation suits high-density configurations where maximum capacity per slot is essential.

Build Integration

The 288-pin RDIMM fits DDR4 registered memory slots on compatible server and workstation motherboards. ECC and registered buffering reduce electrical load on the memory controller, freeing the platform to populate more slots without signal degradation. No heat spreader is included, so airflow in the chassis must accommodate bare modules.

Thermals and Power

Operating at 1.20V, the module draws minimal power for its density under normal workloads. Registered buffering and ECC add negligible latency at CL19 while maintaining stability during sustained operation. Passive cooling relies entirely on system airflow; ensure adequate ventilation across the DIMM slots.

How it compares

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

Price $591.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.62 per GB
Cheaper than about 81% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineMicron Server/Workstaion Compatible Series Memory
Model nameMicron DDR4 2666 MHz ECC RDIMM Registered Server Memory
Part numberMR21300-744K1
Total capacity128 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 rank4Rx4
Power
Rated voltage1.2 V
Compatibility
Compatible systemsMICRON
In the box
Included items128 GB (1 × 128 GB) DDR4 2666 MHz PC4-21300 4Rx4 1.2 V CL19 288-PIN ECC RDIMM Registered Server Memory

Questions about this item

What is the CAS latency of this DDR4 2666 module?

The module runs at CL19 latency as specified in the product details.

Does this registered ECC DIMM generate significant heat during continuous server workloads?

It operates at 1.2 V without a heat spreader, so typical server airflow keeps temperatures within normal limits.

Which motherboard slot and chipset support are required for this 128 GB 4Rx4 RDIMM?

A DDR4 288-pin RDIMM slot and a server chipset that supports 4Rx4 registered ECC modules are needed.

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