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Green circuit board with black memory chips, 260-pin SODIMM form factor

A-Tech

A-Tech 8GB DDR4 2133MHz SODIMM 260-Pin for iMac 21.5 2017

SKU CH-CQKQ-HM288

8GB DDR4 2133MHz SODIMM upgrades compatible 21.5-inch iMac Mid 2017 systems

  • Capacity8GB
  • SpeedDDR4 2133 (PC4 17000)
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank1Rx8
  • 8GB DDR4 2133MHz boosts multitasking and speeds up loading times
  • 260-pin SODIMM form factor fits the iMac 21.5 Mid 2017 slot exactly
  • 20V low-voltage DDR4 reduces power draw and heat in the compact all-in-one
  • Tested with Major Brand chips for reliable operation in Apple model iMac18,1 A1418 EMC 3068
  • Non-ECC unbuffered 1Rx8 module installs easily for an immediate performance upgrade

8GB DDR4 2133MHz SODIMM for 21.5-inch iMac 2017

This 8GB module uses DDR4 2133MHz (PC4-17000) memory in a 260-pin SODIMM form factor. It runs at 1.20V and is unbuffered, non-ECC, single-rank 1Rx8. The stick is built with major-brand chips and contains no heat spreader. It is designed specifically for the Apple iMac (21.5-inch, Mid 2017) matching model ID iMac18,1 and order number MMQA2LL/A.

Who this suits and who should look elsewhere

It suits owners of the listed iMac who want to add or replace memory with a certified, tested module. It does not suit machines that require a different memory generation, pin count, voltage, ECC or registered operation, or a capacity other than 8GB per slot. Builders working on non-Apple platforms or newer Apple models should verify exact specifications before purchase.

The specification that decides fit

The decisive specification is the DDR4 2133MHz SODIMM 260-pin 1.20V unbuffered non-ECC 1Rx8 layout validated for iMac18,1 (A1418 EMC 3068). If your system demands a different speed, pin layout, voltage or error-correction type, this module will not work.

商品特色

  • 8GB DDR4 2133MHz boosts multitasking and speeds up loading times
  • 260-pin SODIMM form factor fits the iMac 21.5 Mid 2017 slot exactly
  • 20V low-voltage DDR4 reduces power draw and heat in the compact all-in-one
  • Tested with Major Brand chips for reliable operation in Apple model iMac18,1 A1418 EMC 3068
  • Non-ECC unbuffered 1Rx8 module installs easily for an immediate performance upgrade

商品規格

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity8GB
SpeedDDR4 2133 (PC4 17000)
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

商品問答

Does this 260-pin DDR4 SODIMM fit the 21.5-inch iMac from 2017?

Yes, it is built for the iMac 21.5 Mid 2017 (model iMac18,1, EMC 3068, order MMQA2LL/A) and uses the 260-pin SO-DIMM form factor that the system requires.

What is the correct way to seat the module so the Mac recognises the full 8 GB?

Power off and unplug the iMac, open the memory door, insert the module at a slight angle until the gold contacts disappear, then press down firmly until both side clips click into place.

Will the 1.20 V DDR4 chips need any firmware update or periodic re-seating over time?

No firmware update is required; the module is non-ECC unbuffered and validated for the iMac. Under normal use it stays seated and needs no maintenance.

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