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Two green DDR3L SODIMM sticks with black chips, 204-pin form factor, 16GB kit

A-Tech

A-Tech 16GB Kit (2x8GB) DDR3L 1866MHz SODIMM 204-Pin for iMac 27-inch Late 2015

SKU CH-36GG-MK3SK

DDR3L 1866 MHz SODIMM kit adds 16 GB across two 8 GB modules for the 27-inch iMac (Late 2015)

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16GB dual-channel kit doubles memory bandwidth for iMac 27-inch Late 2015
  • DDR3L 1866MHz speed matches factory spec for MK462LL/A MK472LL/A MK482LL/A
  • 35V low-voltage DDR3L reduces heat and power draw in A1419 EMC 2834
  • 2Rx8 unbuffered non-ECC modules install directly into 204-pin SODIMM slots
  • Lifetime warranty and US-based tech support back every A-Tech memory upgrade

iMac 27-inch Late 2015 DDR3L Kit

This 16GB kit contains two 8GB DDR3L SODIMM modules built for the iMac 27-inch Late 2015 (model iMac17,1, A1419). It matches the factory DDR3 1866/1867 MHz PC3-14900 specification and runs at 1.35V. The unbuffered, non-ECC 2Rx8 design fits the two SO-DIMM slots in this all-in-one desktop.

204-Pin SO-DIMM Form Factor

Each module uses the standard 204-pin SO-DIMM edge connector required by the Late 2015 iMac. No heat spreader is fitted, keeping the profile low enough for the slim internal cavity. Major-brand chips are used throughout, and every stick is tested to meet the system's timing and voltage requirements before shipping.

Lifetime Warranty with US Support

The kit ships with a lifetime warranty and access to United States-based technical support for installation questions. No additional software or accessories are included; the upgrade relies on the macOS memory management already present in the compatible MK462LL/A, MK472LL/A and MK482LL/A order numbers.

How it compares

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

Price $41.99
Cheaper than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $2.62 per GB
Cheaper than about 91% 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 capacity16 GB (2 × 8 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

Does the DDR3L 1866 PC3-14900 speed cap at 1866 MHz on the iMac 27-inch Late 2015?

Yes, the kit runs at DDR3L 1866/1867 MHz (PC3-14900) which matches the iMac17,1 memory controller specification.

What physical slot and pin count does this 204-pin SODIMM need to fit the iMac?

It uses a standard 204-pin SO-DIMM slot; the iMac 27-inch Late 2015 (A1419, EMC 2834) has two user-accessible slots behind the rear cover.

How are the two 8 GB modules installed and what step is often missed?

Power off, unplug, open the rear memory door, eject any existing modules, insert both 2Rx8 sticks until they click, close the door, then power on to verify 16 GB in System Report.

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