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Two green circuit boards with gold edge connectors and black memory chips

A-Tech

A-Tech 32GB (2x16GB) DDR3L 1866 SODIMM 204-Pin Memory Upgrade for Apple iMac Late 2015

SKU CH-S0G5-2T5BD

A 32 GB kit of two 16 GB DDR3L 1866 SODIMM modules designed for the 27-inch iMac (Late 2015)

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 32 GB total capacity lets you run demanding apps and multitask smoothly
  • 2 x 16 GB DDR3L 1866 MHz modules match the iMac Late 2015 specification
  • 35 V low-voltage operation reduces power draw and heat
  • 204-pin SO-DIMM form factor fits the iMac (Retina 5K, 27-inch, Late 2015) slot exactly
  • Lifetime warranty and US-based tech support back every module

32GB DDR3L Kit for 27-inch iMac Late 2015

This 32GB kit contains two 16GB DDR3L 1866 SODIMM modules built for the Apple iMac (Retina 5K, 27-inch, Late 2015). It matches the factory memory type and pin count for that specific model. Buyers upgrading compatible iMacs can install both modules to reach the full 32GB capacity.

Verify model ID iMac17,1

Check that your iMac carries model identifier iMac17,1 and one of the listed order numbers MK462LL/A, MK472LL/A or MK482LL/A. The system must accept DDR3L 1.35V unbuffered non-ECC SODIMMs with 204 pins. Machines with different identifiers or order numbers may not recognise these modules.

Sustained workloads run at rated 1866 speed

Under continuous load the modules operate at the specified DDR3 1866/1867 MHz (PC3-14900) frequency using major-brand chips. The 2Rx8 rank organisation and 1.35V voltage remain stable during extended multitasking or memory-intensive applications. No heat spreader is fitted, so airflow inside the iMac chassis handles thermal management.

How it compares

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

Price $367.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 32 GB (2 × 16 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $11.50 per GB
Pricier than about 56% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR3 Apple Mac RAM Memory Upgrades
Total capacity32 GB (2 × 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

Does the kit include both 16 GB modules or do I need to buy a second stick separately?

The kit contains two 16 GB modules for a total of 32 GB, so no additional sticks are required.

Should I choose the 32 GB kit or a smaller capacity for my iMac 17,1?

The 32 GB kit matches the maximum supported memory for the iMac 17,1 and uses the specified DDR3L 1866 speed.

Will the DDR3L 1866 speed run at 1866 MHz once installed in my Late 2015 iMac?

Yes, the modules are rated at DDR3L 1866 (PC3L 14900) and will operate at that speed in the compatible iMac.

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