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Green circuit board with black memory chips, 260-pin SODIMM form factor, no heat spreader

A-Tech

A-Tech 16GB DDR4 2133 SODIMM 260-Pin for iMac 21.5 Mid 2017

SKU CH-1CZK-AK0NS

A 16 GB DDR4 2133 SODIMM module built for the 21.5-inch iMac (Mid 2017)

  • Capacity16GB
  • SpeedDDR4 2133 (PC4 17000)
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank2Rx8
  • 16 GB DDR4 2133 MHz boosts multitasking speed
  • 260-pin SO-DIMM fits 21.5-inch iMac Mid 2017
  • 20 V low-voltage design reduces power draw
  • Non-ECC unbuffered 2Rx8 ensures stable operation
  • Major-brand chips tested for reliability

16 GB DDR4 2133 SODIMM for 21.5-inch iMac Mid 2017

This 16 GB DDR4 2133 MHz SODIMM module is built for the Apple iMac 21.5-inch Mid 2017 (model identifiers iMac18,1 and A1418 EMC 3068). It fits the single 260-pin SO-DIMM slot and runs at 1.20 V without ECC or registered buffering.

Capacity and headroom for everyday workloads

The 16 GB module doubles the base 8 GB configuration found on many of these iMacs, letting macOS keep more apps and browser tabs resident in memory. It handles typical creative suites, virtual machines and large photo libraries comfortably, though memory-intensive video editing or 3D rendering will still hit the ceiling.

Upgrade path from the factory 8 GB stick

Replacing the original 8 GB DDR4 2133 SO-DIMM with this 16 GB unit is the only internal memory upgrade the platform supports. The jump is worthwhile when the system frequently swaps to SSD during multitasking; if the workload stays light, the existing module remains adequate.

Highlights

  • 16 GB DDR4 2133 MHz boosts multitasking speed
  • 260-pin SO-DIMM fits 21.5-inch iMac Mid 2017
  • 20 V low-voltage design reduces power draw
  • Non-ECC unbuffered 2Rx8 ensures stable operation
  • Major-brand chips tested for reliability

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity16GB
SpeedDDR4 2133 (PC4 17000)
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions about this item

Will the 16GB DDR4 2133 SODIMM run alongside the original 8GB module in my iMac 21.5 Mid 2017?

Yes, the module uses the same DDR4 2133 specification and 260-pin SO-DIMM form factor as the factory memory, so it will operate together with the existing 8GB stick in the second slot.

How can I verify the new 16GB module is recognised at 2133 MHz after installation?

Open About This Mac and click System Report; the Memory section will show a 16GB DDR4 SO-DIMM running at 2133 MHz with a 2Rx8 rank configuration.

Does the box contain only the 16GB SODIMM or are tools and an anti-static strap included?

The package includes the single 16GB DDR4 2133 SODIMM module only; no installation tools or anti-static accessories are supplied.

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