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Four green rectangular SODIMM modules with black chips in a clear tray

NEMIX RAM

NEMIX RAM 128GB (4x32GB) DDR4 2666 CL19 260-pin SODIMM memory upgrade

SKU CH-HWET-SCHK3

128 GB kit of four 32 GB DDR4 SODIMM modules at 2666 MHz CL19 for Apple iMac and Mac Mini

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V
  • 128 GB kit expands iMac and Mac Mini capacity
  • Four 32 GB modules populate every slot
  • DDR4 2666 speed matches factory specification
  • CL19 latency at 1.2 V keeps power draw low
  • 260-pin SODIMM form factor fits Apple systems

Capacity and compatibility

This 128GB kit contains four 32GB DDR4 2666 CL19 SODIMM modules built for Apple iMac and Mac Mini systems. It targets users who need the maximum supported memory in compatible all-in-one or compact desktops for heavy multitasking and memory-intensive workloads.

Kit configuration and voltage

The four-module kit fills every available slot in supported models, removing the need to match individual sticks later. Each module operates at the standard 1.2V DDR4 voltage and uses unbuffered non-ECC 2Rx8 organisation, so the system recognises the full 128GB without extra configuration steps.

Physical format and daily use

Modules use the 260-pin SODIMM form factor with no heat spreader, keeping the low profile required by slim Apple enclosures. Major-brand Samsung, Micron or Hynix DRAM chips are used throughout, and every stick is stress-tested before shipping to reduce the chance of instability after installation.

How it compares

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

Price $726.99
Pricier than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.68 per GB
Cheaper than about 68% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineApple iMac/Mac Mini Compatible Series Memory
Model nameApple DDR4 2666 MHz Non-ECC Unbuffered SODIMM
Part numberMS21300-328K4
Total capacity128 GB (4 × 32 GB)
Product type260-Pin DDR4 SODIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple
In the box
Included items128 GB (4 × 32 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN Non-ECC Unbuffered SODIMM KIT

Questions about this item

Will the 2Rx8 DDR4 SODIMM modules need any firmware updates or periodic replacement?

No firmware updates are required for DDR4 SODIMM modules; they are passive components with no moving parts and no scheduled replacement interval.

What is the first limit reached under sustained heavy workloads with CL19 2666 MT/s timing?

The CAS latency of 19 cycles at 2666 MT/s sets the access-time floor; sustained throughput cannot exceed the PC4-21300 bandwidth ceiling.

How much heat and power does the 1.2 V 128 GB kit produce when running all day?

Each 32 GB module operates at 1.20 V without a heat spreader; total power scales with capacity but stays within standard DDR4 SODIMM thermal limits.

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