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Green rectangular DDR4 SODIMM module with gold contacts and black chips on both sides, no heat spreader, 260-pin form factor

NEMIX RAM

NEMIX RAM 16GB DDR4 2400 CL17 260-pin SODIMM iMac 2017 27" memory upgrade

SKU CH-T3BW-AAF1J

16 GB DDR4-2400 CL17 SODIMM module upgrades 2017 27-inch iMac with 1.2 V operation

  • Total capacity16 GB
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL17
  • Buffer typeUnbuffered
  • Rated voltage1.2 V

Capacity 16GB

  • 16GB single module doubles iMac capacity
  • DDR4 2400 CL17 matches factory timing
  • 2V low voltage keeps thermals steady
  • 260-pin SODIMM fits 27-inch 2017 slot
  • Major OEM chips ensure rock-solid stability

iMac 2017 27" DDR4 SODIMM upgrade

This 16 GB DDR4 2400 SODIMM is built specifically for the Apple iMac 2017 27 inch Retina 5K. It uses a 260-pin unbuffered non-ECC layout with CL17 timing and 1.2 V operation. The single module fills one slot and raises total memory capacity for demanding creative workloads.

Low-voltage DDR4 thermals

Operating at 1.20 V keeps power draw modest and heat output low inside the sealed all-in-one chassis. No heat spreader is fitted, so the module relies on the iMac's internal airflow path. CL17 latency at 2400 MHz delivers stable throughput without extra voltage stress.

Single-slot 260-pin form factor

The 2Rx8 rank configuration fits the factory SO-DIMM socket and leaves remaining slots free for further expansion. Compatibility is validated for the 27 inch 2017 model, so the module seats without firmware conflicts. Installation follows the standard user-accessible memory door procedure.

How it compares

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

Price $63.99
Cheaper than about 74% 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 $4.00 per GB
Cheaper than about 84% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineApple iMac/Mac Mini Compatible Series Memory
Model nameApple DDR4 2666 MHz Non-ECC Unbuffered SODIMM
Part numberMS19200-628K1
Total capacity16 GB
Product type260-PIN DDR4 SODIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL17
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Memory rank2Rx8
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple
In the box
Included items16 GB (1 × 16 GB) DDR4 2400 MHz PC4-19200 2Rx8 1.2 V CL17 260-PIN Non-ECC Unbuffered SODIMM

Other versions of this model

1 more in the same range

Questions about this item

How do I install the 260-pin SODIMM in my 2017 27-inch iMac, and which step causes problems?

Remove the power cord, press the small button in the memory compartment to eject the old module, then insert the new stick at a slight angle until the clips click — the step people miss is seating it firmly enough for both side clips to lock.

What maintenance or replacement will this 16 GB DDR4 2400 module need later?

No routine maintenance is required; the unbuffered non-ECC SODIMM has no moving parts or heat spreader, so it only needs replacement if a memory error appears or you decide to increase capacity beyond 16 GB.

What limit appears first when this CL17 1.2 V module runs under sustained load?

The CAS latency of CL17 at 2400 MT/s sets the timing ceiling; because the module runs at standard 1.2 V without a heat spreader, thermal throttling is unlikely, so latency remains the first bottleneck.

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