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Two green DDR4 SODIMM modules with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR4 2400 CL17 260-PIN SODIMM for Apple iMac 2017 27" Retina 5K memory upgrade

SKU CH-G8Z8-S9MZ9

16 GB DDR4 2400 CL17 SODIMM kit for 2017 27-inch iMac 5K, 1.2 V unbuffered

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL17
  • Buffer typeUnbuffered
  • Rated voltage1.2 V

Capacity 16GB 2X8GB

  • Designed for Apple iMac 2017 27" Retina 5K
  • 16GB kit (2x8GB) DDR4 2400 CL17
  • Low 1.20V voltage reduces power draw
  • Unbuffered non-ECC 260-pin SODIMM format
  • Built with major OEM Samsung, Micron, Hynix chipset

16 GB DDR4 2400 SODIMM kit for 2017 27″ iMac

This kit delivers 16 GB of DDR4 2400 memory in two 8 GB modules built to the 260-pin SODIMM form factor. It is configured as non-ECC unbuffered RAM with CL17 latency and operates at 1.2 V. The modules are validated for the Apple iMac 2017 27″ Retina 5K all-in-one desktop.

Verify your iMac model and open SO-DIMM slots

Confirm that the system is the 2017 27″ Retina 5K iMac before ordering. Check the number of accessible memory slots and the maximum capacity supported by that specific model. Ensure the existing memory uses DDR4 SODIMM modules so the new kit matches the installed generation.

Fits the iMac memory compartment without a heat

The low-profile modules install directly into the SO-DIMM slots behind the memory access door. No heat spreader means they clear the tight internal clearance of the all-in-one chassis. The upgrade frees the system from the factory memory limit and lets macOS address the full 16 GB for heavier workloads.

How it compares

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

Price $84.99
Cheaper than about 69% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.31 per GB
Cheaper than about 73% 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 ECC Unbuffered SODIMM
Part numberMS19200-818K2
Total capacity16 GB (2 × 8 GB)
Product type260-PIN DDR4 SODIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL17
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank1Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple
In the box
Included items16 GB (2 × 8 GB) DDR4 2400 MHz PC4-19200 2Rx8 1.2 V CL17 260-PIN Non-ECC Unbuffered SODIMM KIT

Other versions of this model

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Questions about this item

What comes in the box and do I need any extra parts for the iMac 2017 27" Retina 5K?

The kit contains two 8 GB DDR4 2400 CL17 260-pin SODIMM modules totalling 16 GB. No additional components are required for installation in the compatible iMac.

Should I choose the 2400 MHz CL17 kit or the 2666 MHz ECC version listed in the model field?

The 2400 MHz CL17 non-ECC unbuffered kit matches the iMac 2017 27" Retina 5K specification; the 2666 MHz ECC model is a different part not validated for this system.

How does the CL17 latency at 2400 MHz affect real-world performance once installed?

CL17 at 2400 MHz provides the standard timing Apple specifies for this iMac, delivering the expected memory bandwidth and responsiveness for everyday workloads.

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