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Four green DDR4 SODIMM sticks with black chips, 260-pin form factor

A-Tech

A-Tech 16GB (4x4GB) DDR4-2666 SODIMM 260-Pin for iMac 27-inch 2019-2020 memory upgrade

SKU CH-45AB-P8X37

A 16 GB kit of four DDR4 2666 MHz SODIMM modules built for 27-inch iMac models from 2019 and 2020

  • Capacity16GB (4 x 4GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank1Rx16
  • 16 GB total capacity for smoother multitasking
  • Four 4 GB modules fill all iMac 27-inch slots
  • DDR4 2666 MHz speed matches Apple specifications
  • 20 V low-voltage operation reduces power draw
  • Compatible with 2019 and 2020 iMac 27-inch models

iMac 27-inch 2019-2020 DDR4 upgrade

This 16GB kit contains four 4GB DDR4 SODIMM modules built for Apple iMac 27-inch models from 2019 and 2020. The memory runs at 2666MHz with a 1.20V operating voltage. It uses unbuffered non-ECC chips in a 1Rx16 rank configuration and fits the 260-pin SO-DIMM slots found in those systems.

Four matched modules fill every slot

The kit supplies exactly four modules so all available memory slots are populated at once. Matched capacity and timing across the set avoid mixed-rank behaviour and let the iMac run in its optimal multi-channel mode without further configuration.

Suits owners of listed iMac models needing maximum

Buyers with iMac19,1 or iMac20,1/20,2 identifiers and order numbers MRQY2LL/A through MXWV2LL/A can install this kit directly. Systems that require ECC registered memory or a different pin count cannot use these modules.

Punti di forza

  • 16 GB total capacity for smoother multitasking
  • Four 4 GB modules fill all iMac 27-inch slots
  • DDR4 2666 MHz speed matches Apple specifications
  • 20 V low-voltage operation reduces power draw
  • Compatible with 2019 and 2020 iMac 27-inch models

Caratteristiche tecniche

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity16GB (4 x 4GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCNo
Buffered/RegisteredUnbuffered
Rank1Rx16
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Domande su questo articolo

Will the 1Rx16 rank modules need any firmware updates or reconfiguration after installation?

The 1Rx16 unbuffered modules install without firmware changes; the iMac firmware recognises them at boot and no further maintenance is required.

What thermal limit appears first when all four slots run continuously at DDR4 2666?

The iMac chassis cooling governs sustained temperature; the memory itself has no spreader and relies on system airflow to stay within spec.

How much power do the four 1.20 V modules draw under full load all day?

Each module operates at 1.20 V; total draw stays within the iMac's standard DDR4 SODIMM power budget for 260-pin slots.

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