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Four green DDR3L SODIMM modules with black chips, 204-pin, no heat spreader

A-Tech

A-Tech 64GB Kit (4x16GB) DDR3L 1866MHz SODIMM 204-Pin Memory Upgrade for Apple iMac (Late 2015)

SKU CH-FKT0-3G60Y

A 64 GB kit of four 16 GB DDR3L 1866 MHz SODIMM modules built for the 27-inch iMac (Late 2015)

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 64 GB total capacity lets you run heavy workloads with 4 x 16 GB modules
  • DDR3L 1866 MHz speed matches the iMac Late 2015 memory controller
  • 35 V low-voltage DDR3L reduces power draw and heat in the all-in-one chassis
  • 204-pin SODIMM form factor fits the four SO-DIMM slots inside the 27-inch iMac (A1419)
  • Non-ECC unbuffered 2Rx8 chips validated for Apple model IDs iMac17,1 and order numbers MK462LL/A, MK472LL/A, MK482LL/A

Apple iMac Late 2015 memory kit

This 64 GB kit contains four 16 GB DDR3L SODIMM modules built for the 27-inch iMac (Late 2015). It runs at 1866 MHz with a low 1.35 V voltage and uses unbuffered, non-ECC chips in a 204-pin form factor.

Owners of the specified iMac models

The kit matches Apple order numbers MK462LL/A, MK472LL/A and MK482LL/A as well as model identifier iMac17,1. It will not suit users with other Mac models, desktop DIMM slots or systems that require registered or ECC memory.

Four-module 64 GB capacity

Filling all four SODIMM slots with 16 GB modules delivers the maximum 64 GB supported by this iMac. Buyers needing less memory or a different module count should choose a smaller kit.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $741.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $11.59 per GB
Pricier than about 56% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR3 Apple Mac RAM Memory Upgrades
Total capacity64 GB (4 × 16 GB)
Performance
Rated speedDDR3L 1866 (PC3L 14900)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will the 1.35 V DDR3L modules run cooler and draw less power than standard 1.5 V DDR3 when the iMac is under load all day?

Yes, the 1.35 V DDR3L voltage reduces power draw and heat output compared with standard 1.5 V DDR3, helping the iMac stay cooler during extended workloads.

Does the iMac (Late 2015) need any firmware update or special tools before I install these four 16 GB SODIMMs?

No firmware update or special tools are required; the 204-pin DDR3L 1866 MHz modules are a direct drop-in upgrade for the iMac17,1 (A1419, EMC 2834).

Can I keep the original Apple memory and add this 64 GB kit alongside it in the four slots?

The Late 2015 27-inch iMac has only four SODIMM slots, so the 4 x 16 GB kit fills every slot and leaves no room for the original modules.

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