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Two green SODIMM sticks side by side, no heat spreaders, gold edge connectors visible

NEMIX RAM

NEMIX RAM 32GB (2×16GB) DDR4 2666 CL19 SODIMM memory upgrade for 27" iMac 5K Mid 2020

SKU CH-ERY2-K4VMZ

32 GB dual-channel kit of 2666 MHz DDR4 SODIMM modules for 27-inch 5K iMac Mid 2020

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V

Capacity 32GB 2X16GB

  • 32 GB kit expands multitasking headroom for demanding workloads
  • Dual 16 GB modules enable dual-channel bandwidth on supported iMacs
  • DDR4 2666 CL19 timing matches factory specifications exactly
  • 2 V operation keeps power draw low inside the slim chassis
  • 260-pin SODIMM form factor fits the 27-inch Mid 2020 iMac memory slots

Targeted upgrade for 27-inch iMac 5K Mid 2020

This 32 GB kit contains two 16 GB DDR4 2666 SODIMM modules built for the Apple iMac 20,1 and 20,2. It uses 260-pin unbuffered non-ECC memory running at 1.2 V with CL19 timing. The kit suits owners who want the maximum supported capacity for intensive creative workloads.

Thermals noise and power draw in normal use

Modules operate at the standard 1.2 V DDR4 voltage without a heat spreader, relying on the iMac's internal airflow. The low-voltage DDR4 design keeps power draw modest during sustained loads. No moving parts mean the upgrade adds no audible noise to the system.

Build quality and connector implications

Each stick uses major-brand Samsung Micron or Hynix chips in a 2Rx8 configuration validated for Apple all-in-one compatibility. The 260-pin SODIMM form factor fits the SO-DIMM slots behind the iMac's rear access panel. Installing the matched pair enables dual-channel operation for the full 32 GB capacity.

How it compares

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

Price $136.99
Cheaper than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $4.28 per GB
Cheaper than about 83% 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 numberMS21300-628K2
Total capacity32 GB (2 × 16 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 items32 GB (2 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN Non-ECC Unbuffered SODIMM KIT

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