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Four green DDR4 SODIMM modules with black chips on a light surface

Computer Memory Solutions

Computer Memory Solutions 64GB (4x16GB) DDR4 2400 CL17 260-Pin SODIMM iMac 27" 5K 2017

SKU CH-6XQS-V4S9A

A 64 GB kit of four 16 GB DDR4 2400 CL17 SODIMM modules built for the 27-inch 5K iMac (Mid-2017)

  • Total capacity64 GB (4 × 16 GB)
  • Rated speedDDR4 2400 (PC4 19200)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL17
  • Memory timings17-17-17
  • Rated voltage1.2 V
  • 64 GB total capacity lets you run demanding apps on the 27-inch 5K iMac
  • Four 16 GB modules fill every slot for maximum bandwidth
  • DDR4 2400 speed matches the system memory bus
  • CL17 latency keeps response times tight for multitasking
  • 2 V unbuffered design installs without extra power or cooling

System-specific DDR4 upgrade for 27-inch 5K iMac

This 64GB kit contains four 16GB DDR4 2400 CL17 SO-DIMM modules built for the Apple iMac Core i5 3.5 27-Inch 5K Mid-2017 MNEA2LL/A. It is intended for owners of that exact model who want to reach the 64GB maximum memory supported by the machine. The unbuffered, non-ECC 260-pin modules run at 1.2V.

Straightforward user installation

The iMac 27-inch 5K 2017 provides a memory access door, so the four sticks can be fitted without removing the display. Insert each module until it clicks; a partial seat is the most common cause of a no-boot or reduced-capacity result. No heat spreaders are present, so clearance inside the door is not an issue.

Verify the exact model identifier before ordering

Confirm the iMac shows "iMac (27-inch, 5K, Mid 2017)" and model number MNEA2LL/A in About This Mac. The system has four SO-DIMM slots and a 64GB limit, so all four slots must be populated with this kit. Earlier or later 27-inch iMacs use different memory specifications and will not accept these modules.

How it compares

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

Price $449.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB (4 × 16 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $7.03 per GB
Cheaper than about 57% 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 nameCM2048642400SO
Total capacity64 GB (4 × 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 i5 3.5 27 in 5K Mid-2017 MNEA2LL/A
In the box
Included items4 Memory RAM Sticks

Questions about this item

How can I confirm the kit is running at the rated 2400 MHz CL17 after installation?

Open System Report in macOS, select Memory, and verify each slot shows 16 GB DDR4 at 2400 MHz with timing 17-17-17.

What does the kit include and is anything else required for the iMac 27-inch 5K Mid-2017?

The box contains four 16 GB 260-pin DDR4 SO-DIMM modules; the iMac has four slots and no extra parts or tools are needed.

Should I choose this 64 GB kit or a smaller capacity for the Mid-2017 27-inch 5K iMac?

This 64 GB (4×16 GB) kit fills all four slots and matches the model's maximum supported memory.

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