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Green circuit board SODIMM module with black chips and gold edge connector

NEMIX RAM

NEMIX RAM 16GB DDR3 1866MHz 1.35V 204-Pin SODIMM for Apple iMac Late 2015 27" Retina 5K memory upgrade

SKU CH-S6XW-FW1JX

A 16 GB DDR3 SODIMM running at 1866 MHz and 1.35 V for upgrading the 27-inch iMac Retina 5K from late 2015

  • Total capacity16 GB
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL13
  • Buffer typeUnbuffered
  • Rated voltage1.35 V
  • 16GB capacity expands multitasking headroom on 27" iMac
  • DDR3 1866MHz speed matches Late 2015 factory spec
  • 35V low voltage reduces power draw and heat
  • 204-pin SODIMM form factor fits Apple iMac memory slots
  • CL13 CAS latency supports responsive system operation

16GB DDR3 1866MHz SODIMM for 27" iMac Late 2015

This 16GB module is built specifically for the Apple iMac Late 2015 27-inch Retina 5K. It runs at 1866MHz (PC3-14900) with a low 1.35V voltage and CL13 latency. The 204-pin unbuffered non-ECC design matches the factory specification for this all-in-one desktop.

Suits owners upgrading a compatible 27-inch iMac

The stick fits the single SODIMM slot in the Late 2015 27-inch Retina 5K iMac. It uses major-brand Samsung, Micron or Hynix chips and is rigorously stress-tested. Buyers with different Apple models, Windows laptops, or desktops requiring other DDR generations should look elsewhere because the pin layout, voltage, and generation will not match.

204-pin DDR3 SODIMM form factor decides fit

Only systems accepting 204-pin DDR3 SODIMM modules at 1.35V can use this memory. The physical notch position and electrical signalling are fixed by the DDR3 standard, so any machine needing a different pin count or voltage will reject the module. Verify the exact model identifier before ordering.

How it compares

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

Price $141.99
Cheaper than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $8.87 per GB
Typical for this category: the median of 20,941 items is $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 numberMS14900-628LK1
Total capacity16 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 (1 × 16 GB) DDR3 1866 MHz PC3-14900 2Rx8 1.35 V 204-PIN Non-ECC Unbuffered SODIMM

Questions about this item

Does this 204-pin DDR3 SODIMM fit the memory slot of an iMac Late 2015 27" Retina 5K?

Yes — the module is built to the 204-pin DDR3 SODIMM form factor that the iMac Late 2015 27" Retina 5K uses for memory upgrades.

Can I keep the original 1866 MHz modules and add this 16 GB stick without speed mismatch?

The stick runs at DDR3 1866 (PC3-14900) with CL13 latency, matching the factory memory speed so the system will operate all modules at the same rate.

After installation, how do I confirm the Mac recognises the full 16 GB at 1866 MHz?

Open About This Mac → System Report → Memory; you should see a 16 GB DDR3 module listed at 1866 MHz with 1.35 V voltage.

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