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Green circuit board SODIMM module with black chips, 260 gold pins, no heat spreader

A-Tech

A-Tech 4GB DDR4 2666MHz SODIMM 260-Pin memory upgrade

SKU CH-AJM9-6VSZA

4GB DDR4 2666MHz SODIMM module upgrades compatible Apple iMac and Mac mini models from 2018 to 2020

  • Capacity4GB
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank1Rx16
  • Adds 4GB capacity for smoother multitasking
  • Runs at 2666MHz DDR4 speed for faster data rates
  • 260-pin SODIMM fits iMac 21.5-inch 2019 and 27-inch 2019/2020 models
  • 20V low-voltage design reduces power draw
  • Tested with major-brand chips for reliable operation

What this module is and who it fits

This 4 GB DDR4 SODIMM runs at 2666 MHz and uses the 260-pin form factor required by the listed Apple iMac and Mac mini models from 2018 through 2020. It is built for owners of those specific machines who need a single module to fill an empty slot or replace a failed stick.

Sustained-load behaviour

The module operates at 1.20 V with a 1Rx16 unbuffered layout, so it maintains its rated speed without the extra latency of registered designs. Under continuous workloads the Major Brand chips keep timing stable, letting the system handle larger datasets and heavier multitasking without throttling.

What it replaces and when the upgrade makes sense

It replaces the factory-installed memory in the compatible iMac and Mac mini systems, doubling capacity when a single 4 GB stick was originally fitted. The jump is worthwhile when the machine regularly runs out of available RAM during everyday tasks, but it does not help users who need ECC protection or higher-density modules beyond 4 GB.

Põhijooned

  • Adds 4GB capacity for smoother multitasking
  • Runs at 2666MHz DDR4 speed for faster data rates
  • 260-pin SODIMM fits iMac 21.5-inch 2019 and 27-inch 2019/2020 models
  • 20V low-voltage design reduces power draw
  • Tested with major-brand chips for reliable operation

Tehnilised andmed

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity4GB
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx16
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Küsimused selle toote kohta

How much heat does the 1.20V DDR4 2666MHz SODIMM generate when running continuously in an iMac 27-inch 2020?

The module operates at 1.20V without a heat spreader, so it adds minimal thermal load inside the compact iMac chassis during all-day workloads.

Which Apple order numbers must my Mac mini or iMac already carry for this 260-pin module to be recognised?

Supported order numbers include MRQY2LL/A, MRR02LL/A, MRR12LL/A, MRT42LL/A, MXWT2LL/A, MXWU2LL/A, MXWV2LL/A, MRTR2LL/A, MRTT2LL/A, MXNF2LL/A and MXNG2LL/A.

Will this 4GB 1Rx16 stick work alongside the original 8GB DDR4 2666 memory in a 2019 iMac 21.5-inch?

Yes, it matches the factory DDR4 2666 specification and 260-pin form factor, so the iMac will run both modules in dual-channel mode.

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