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Computer Memory Solutions

Computer Memory Solutions 32GB (2x16GB) DDR4 2400 CL17 SODIMM for iMac 27" 5K Mid-2017

SKU CH-EXJ8-365EM

A 32 GB DDR4 kit of two 16 GB SODIMM modules rated at 2400 MHz CL17 for the 27-inch 5K iMac (Mid-2017)

  • Total capacity32 GB (2 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 32 GB total capacity from two 16 GB modules for demanding multitasking
  • DDR4 2400 speed rated at PC4 19200 for responsive system performance
  • CL17 latency with 17-17-17 timing for stable operation
  • 2 V low-voltage design reduces power draw and heat
  • 260-pin SO-DIMM form factor built for the 27-inch 5K iMac Mid-2017

32 GB DDR4 kit for 27-inch iMac 5K Mid-2017

This 32 GB kit contains two 16 GB DDR4 2400 SO-DIMM modules built to the exact specification Apple used in the 27-inch 5K iMac released in mid-2017. It is intended for owners of that model who want to reach the machine's 64 GB ceiling without mixing module sizes.

Thermals noise and power draw

Each stick runs at the standard 1.2 V DDR4 voltage and carries no heat spreader, so the modules rely on the iMac's existing airflow. The unbuffered, non-ECC design adds no active components, meaning power draw and acoustic profile remain identical to the factory-installed memory.

What the bundle changes

The package supplies a matched pair of 16 GB sticks, letting you populate two of the four slots in a single step and leave the other two free for a future upgrade to 64 GB. Computer Memory Solutions validates every module against the target iMac and backs the kit with a limited lifetime warranty when purchased directly.

How it compares

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

Price $160.99
Cheaper than about 60% of the 21,161 comparable items (median $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 $5.03 per GB
Cheaper than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048642400SO
Total capacity32 GB (2 × 16 GB)
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2400 (PC4 19200)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL17
Memory timings17-17-17
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple iMac Core i7 4.2 27 in (5K, Mid-2017)
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I install the 260-pin DDR4 SO-DIMM modules in the 27-inch 5K iMac (Mid-2017) and which step is often missed?

Power off and unplug the iMac, lay it face-down on a soft cloth, press the button under the power port to open the memory door, eject any existing modules by pulling the side levers outward, align each 260-pin stick's notch with the slot key, press firmly until the levers click back, then close the door before reconnecting power.

What maintenance or replacement will the 32 GB (2×16 GB) DDR4 2400 CL17 kit need over time?

No routine maintenance is required; the unbuffered non-ECC modules have no moving parts or batteries. If a stick ever fails, the limited lifetime warranty from Computer Memory Solutions covers repair or exchange for the original purchaser.

What limit appears first during sustained heavy workloads with this 1.2 V 2Rx8 DDR4 2400 memory?

The memory controller in the 4.2 GHz Core i7 iMac caps usable speed at 2400 MT/s, so bandwidth tops out at the PC4-19200 rating; thermals stay within spec because the SODIMMs run at standard 1.2 V without a heat spreader.

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