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Two green circuit boards with black chips, 260-pin SODIMM form factor, no heat spreader

A-Tech

A-Tech 32GB (2x16GB) DDR4 2133MHz SODIMM 260-Pin Memory Upgrade for Apple iMac 21.5-inch Mid 2017

SKU CH-486V-6QQ5E

32 GB kit of two 16 GB DDR4 2133 MHz SO-DIMM modules for the 21.5-inch iMac (Mid 2017)

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 32 GB capacity with two 16 GB modules
  • DDR4 2133 MHz speed for faster loading
  • 260-pin SO-DIMM fits iMac 21.5-inch Mid 2017
  • 20 V low voltage reduces power draw
  • Non-ECC unbuffered design ensures stable operation

Compatible iMac Model

This 32GB kit uses two 16GB DDR4 2133MHz SODIMM modules built for the 21.5-inch iMac from Mid 2017. It matches Apple order number MMQA2LL/A and model identifier iMac18,1. The 260-pin unbuffered design installs directly into the factory memory slots.

Who It Suits

Owners of the specified 21.5-inch Mid 2017 iMac who need the maximum 32GB capacity for heavier multitasking or memory-intensive applications. It is not for any other iMac size, any other year, or any system that requires ECC or registered memory.

Deciding Specification

The kit is validated for Apple model A1418 (EMC 3068) running DDR4 at 2133MHz (PC4-17000) with a 2Rx8 rank configuration. If your iMac carries a different model ID or requires a different speed, voltage or rank, this memory will not be compatible.

How it compares

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

Price $151.99
Cheaper than about 61% 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 $4.75 per GB
Cheaper than about 80% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity32 GB (2 × 16 GB)
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

How can I confirm the 32 GB kit is recognised at 2133 MHz after installing it in my 21.5-inch iMac from 2017?

Open About This Mac and check the Memory tab — it should show 32 GB (2 x 16 GB) of DDR4 running at 2133 MHz.

What comes in the box and do I need any extra tools or modules for the upgrade?

The package contains two 16 GB DDR4 260-pin SODIMM modules; no additional parts or tools are required for installation.

Which capacity should I choose between the 32 GB kit and a smaller option for my iMac18,1?

The 32 GB (2 x 16 GB) kit matches the maximum supported memory for the iMac18,1 and fills both slots for optimal dual-channel performance.

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