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Two green SO-DIMM sticks with black chips, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 16GB (2x8GB) DDR3L 1866 SO-DIMM for iMac 27-inch Late 2015

SKU CH-753E-NACNF

A 16 GB dual-channel DDR3L kit tuned for the 27-inch Late 2015 iMac with 1866 MHz speed and 1.35 V operation

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3L 1866 (PC3L 14900)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL13
  • Memory timings13-13-13
  • Rated voltage1.35 V
  • 16 GB kit upgrades Late 2015 iMac to 16 GB
  • DDR3L 1866 speed matches factory specification
  • 35 V low voltage reduces power draw
  • 204-pin SO-DIMM fits the 27-inch model
  • CL13 timing delivers responsive performance

System-Specific 16GB Kit for 27-inch iMac Late 2015

This 16GB kit contains two 8GB DDR3L SO-DIMM modules built for the iMac 3.3GHz quad-core Retina 5K, 27-inch, Late 2015. It targets owners of that specific model who need to reach the factory memory ceiling without guesswork.

DDR3L SO-DIMM limits at 1866 MHz and 1.35V

The iMac Late 2015 accepts DDR3L SO-DIMM at 1866 MHz (PC3L-14900) with CL13 timing and 1.35V operation. Modules that exceed this speed, use standard 1.5V DDR3, or require ECC will not be recognised by the system firmware.

Two 8GB sticks fill half the slots for 16GB total

The computer provides four SO-DIMM sockets with a 32GB maximum. This kit occupies two slots with 2Rx8 unbuffered modules, leaving two sockets free. Buyers who want the full 32GB capacity must add a second matching kit.

How it compares

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

Price $36.99
Cheaper than about 82% 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 $2.31 per GB
Cheaper than about 92% 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 nameComputer Memory Solutions
Model nameCM10246414900SODRL
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3L 1866 (PC3L 14900)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL13
Memory timings13-13-13
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsiMac 3.3 GHz quad core Retina 5K, 27 in, Late 2015
In the box
Included items2 Memory RAM Sticks

Questions about this item

Should I choose the 16 GB kit or the 32 GB maximum for my Late 2015 iMac 27-inch?

The kit provides 16 GB total in two 8 GB modules; the iMac supports up to 32 GB across its four slots, so you can add another identical kit later if you need the full 32 GB.

What does the 1866 MHz DDR3L rating mean once installed in the iMac?

The modules run at 1866 MHz with CL13 timings at 1.35 V, matching the iMac's memory controller specification for DDR3L 1866 (PC3L-14900) operation.

Does the 204-pin SO-DIMM interface limit speed or capacity in this iMac?

The 204-pin DDR3L SO-DIMM form factor is the native interface for the Late 2015 27-inch iMac, allowing the full 1866 MHz speed and up to 8 GB per module across the four slots.

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