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Two green circuit-board modules with black memory chips and gold edge connectors

NEMIX RAM

NEMIX RAM 16GB (2x8GB) DDR3 1866MHz CL13 1.35V 204-Pin SODIMM Kit for Apple iMac 27" Late 2015

SKU CH-G35A-NPMYW

DDR3 SODIMM kit adds 16 GB across two 8 GB modules at 1866 MHz CL13 for the 27-inch iMac from late 2015

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL13
  • Buffer typeUnbuffered
  • Rated voltage1.35 V
  • 16 GB kit boosts multitasking headroom on 27" iMac Late 2015
  • DDR3 1866 MHz CL13 delivers responsive system performance
  • Low 1.35 V operation reduces power draw and heat
  • 204-pin SODIMM form factor fits factory memory slots exactly
  • Dual-rank 2Rx8 organisation maximises memory bandwidth per module

Target system and kit contents

This 16 GB kit contains two 8 GB DDR3 SODIMM modules rated at 1866 MHz with CL13 latency. It is built specifically for the Apple iMac 27 inch Late 2015 with Retina 5K display and uses the 204-pin form factor required by that model. The modules are non-ECC and unbuffered.

Sustained-load behaviour

Operating at 1.35 V, the memory maintains its 1866 MHz data rate during extended workloads without dropping to lower speeds. The 2Rx8 organisation and major-brand DRAM chips from Samsung, Micron or Hynix provide stable throughput for long rendering, compilation or virtualisation sessions. No heat spreader is fitted, relying on the iMac's internal airflow.

Thermals, noise and power

Low-voltage DDR3 at 1.35 V reduces power draw compared to standard 1.5 V modules, helping keep internal temperatures down during continuous use. With no moving parts and no spreader to trap heat, the kit adds no audible noise and places minimal extra demand on the iMac's cooling system.

How it compares

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

Price $34.99
Cheaper than about 83% 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 $2.19 per GB
Cheaper than about 93% 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 nameNEMIX RAM
Product lineApple iMac/Mac Mini Compatible Series Memory
Model nameApple DDR3 1866 MHz Non-ECC Unbuffered SODIMM
Part numberMS14900-828LK2
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SODIMM
Performance
Rated speedDDR3 1866 (PC3 14900)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL13
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.35 V
Compatibility
Compatible systemsApple
In the box
Included items16 GB (2 × 8 GB) DDR3 1866 MHz PC3-14900 2Rx8 1.35 V 204-PIN Non-ECC Unbuffered SODIMM KIT

Questions about this item

Does the 1.35 V DDR3 1866 kit run cooler than standard 1.5 V modules during all-day use?

At 1.35 V the modules draw less power than standard 1.5 V DDR3, so they generate less heat and stay quieter in a 27" iMac running continuously.

Must my iMac 27" Late 2015 already have four SODIMM slots free to install this 2×8 GB kit?

The Late 2015 27" iMac has four SODIMM slots; this kit occupies two of them, so you only need two free slots, not four.

Will the CL13 1866 MHz timing work with the 1866 MHz memory already installed in my Late 2015 iMac?

The iMac Late 2015 ships with 1866 MHz DDR3, so this CL13 1866 kit matches the factory speed and timing exactly.

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