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Green rectangular circuit board with black memory chips and gold edge connector

A-Tech

A-Tech 16GB DDR4 2400 SODIMM 260-Pin Memory Upgrade

SKU CH-1B9Q-72ZSR

16GB DDR4 2400 SODIMM upgrades select 21.5 and 27-inch iMacs from 2017 and 2019

  • Capacity16GB
  • SpeedDDR4 2400 (PC4 19200)
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank2Rx8
  • 16 GB module expands capacity for heavier workloads
  • DDR4 2400 MHz speed matches iMac memory bus
  • 260-pin SODIMM fits 21.5" and 27" Mid 2017 and 2019 iMacs
  • 20 V low voltage reduces power draw and heat
  • Lifetime warranty and US-based tech support back every module

Designed for Apple iMac 2017 and 2019

This 16GB DDR4 SODIMM is built for Apple iMac models from Mid 2017 and 2019, including the 21.5-inch 4K and 27-inch 5K configurations. It matches the factory DDR4 2400 specification so the system recognises it immediately without firmware changes. The module suits owners who want a single-stick upgrade to the maximum supported slot capacity.

Runs at standard 1.20V with no heat spreader

The module operates at the standard DDR4 voltage of 1.20V and is unbuffered non-ECC, so it draws the same power as the original memory. No heat spreader is fitted, keeping the profile low enough for the tight SODIMM slots in these iMacs. Under normal workloads the memory runs silently and adds no measurable thermal load to the compact enclosure.

Single 16GB 2Rx8 module at DDR4 2400

The kit provides one 16GB stick organised as 2Rx8, running at DDR4 2400 (PC4-19200) with 260 pins. This density and rank configuration is the specific requirement for the compatible iMac models listed. Buyers needing ECC, registered DIMMs, or a different speed or voltage will not be able to use this module.

Points forts

  • 16 GB module expands capacity for heavier workloads
  • DDR4 2400 MHz speed matches iMac memory bus
  • 260-pin SODIMM fits 21.5" and 27" Mid 2017 and 2019 iMacs
  • 20 V low voltage reduces power draw and heat
  • Lifetime warranty and US-based tech support back every module

Caractéristiques

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity16GB
SpeedDDR4 2400 (PC4 19200)
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions sur cet article

How do I install the 16GB DDR4 2400 SODIMM into my iMac and what step do people often miss?

Power off and unplug the iMac, lay it screen-down on a soft cloth, remove the memory access door with a Phillips screwdriver, eject any existing modules by pushing the side levers outward, align the 260-pin notch on the new module, press firmly until the levers click back, then replace the door before reconnecting power.

What maintenance or replacement will this 16GB DDR4 2400 module need over time?

No scheduled maintenance is required; the unbuffered non-ECC DDR4 SODIMM has no moving parts or batteries, so it typically lasts the life of the iMac unless a rare defect appears, in which case the lifetime warranty covers replacement.

What limit appears first when the 16GB DDR4 2400 SODIMM runs under sustained heavy workloads?

The 2400 MHz DDR4 speed and 1.20 V voltage set the bandwidth ceiling, so prolonged maximum throughput tasks will hit the module's rated transfer rate before thermal throttling becomes a factor.

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