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Green circuit board SODIMM module with black memory chips, no heat spreader, 260 pins

NEMIX RAM

NEMIX RAM 16GB DDR4 2666 CL19 SODIMM for Apple 27" iMac Mid 2020 memory upgrade

SKU CH-DS75-CGANA

16 GB DDR4 2666 CL19 SODIMM module designed for 27 inch Apple iMac Mid 2020 upgrades

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL19
  • Buffer typeUnbuffered
  • Rated voltage1.2 V

Capacity 16GB

  • 16GB capacity upgrades your 27" iMac Mid 2020
  • DDR4 2666 speed matches factory specification
  • CL19 latency supports stable operation
  • 2V low voltage reduces power draw
  • 260-pin SODIMM form factor fits the iMac slot

16 GB DDR4 SODIMM for 27" iMac Mid 2020

This 16 GB DDR4 2666 CL19 SODIMM is built specifically for the Apple 27-inch iMac with Retina 5K display released in mid 2020. It targets owners of the iMac 20,1 and iMac 20,2 models who want to increase memory capacity using a single 260-pin module.

Verify slot availability

Confirm that your iMac matches the mid 2020 27-inch Retina 5K models identified as iMac 20,1 or iMac 20,2. Check how many SODIMM slots are free inside the memory compartment so you know whether a single 16 GB stick completes the upgrade or adds to existing modules.

Unbuffered non-ECC module with major OEM chips

The stick uses Samsung, Micron or Hynix components on a standard green PCB without a heat spreader. Its 1.2 V operation and CL19 timing follow the PC4-21300 specification, while the 2Rx8 organisation fits the iMac memory controller. The bare-board design slides into the SO-DIMM slot and is secured by the metal retention clips already present in the iMac.

How it compares

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

Price $74.99
Cheaper than about 71% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.69 per GB
Cheaper than about 80% 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 numberMS21300-628K1
Total capacity16 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 items16 GB (1 × 16 GB) DDR4 2666 MHz PC4-21300 2Rx8 1.2 V CL19 260-PIN Non-ECC Unbuffered SODIMM

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Questions about this item

Does the box contain only the 16 GB DDR4 2666 CL19 SODIMM module or are tools and cables included?

The package contains one 16 GB 260-pin DDR4 2666 CL19 SODIMM; no tools, cables or additional components are supplied.

Should I pick the 16 GB CL19 stick or a different capacity for the 27-inch iMac Mid 2020?

This 16 GB CL19 module matches the iMac 20,1 and 20,2 specification; choose it when you need a single 16 GB upgrade, otherwise select a different capacity kit.

What does the 2666 MT/s rating deliver once the module is installed in the iMac?

The module runs at DDR4 2666 (PC4-21300) with CL19 latency at 1.2 V, providing the exact speed and timing the Mid 2020 27-inch iMac expects.

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