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Two green DDR4 RDIMM sticks with gold contacts, no heat spreader

A-Tech

A-Tech 8GB (2x4GB) DDR4 2666 ECC RDIMM iMac Pro 2017 memory upgrade

SKU CH-VHQF-85QA5

An 8 GB DDR4 2666 MHz ECC registered kit of two 4 GB modules for the 2017 iMac Pro

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank1Rx8
  • Boosts multitasking with 8GB dual-channel DDR4 2666MHz kit
  • ECC registered RDIMM protects data integrity on iMac Pro
  • 20V low-voltage DDR4 reduces power draw and heat
  • Designed for iMac Pro 27-inch Late 2017 model A1862
  • 288-pin RDIMM form factor ensures direct slot compatibility

Targeted iMac Pro upgrade

This 8 GB kit contains two 4 GB DDR4 2666 ECC registered DIMMs built for the iMac Pro (Retina 5K, 27-inch, Late 2017). The modules run at 1.20 V and use a 288-pin RDIMM form factor with 1Rx8 organisation. They match Apple order number MQ2Y2LL/A and model identifier iMacPro1,1.

Suited for ECC workloads only

The kit suits owners of the Late 2017 iMac Pro who need ECC registered memory for data-integrity tasks such as scientific computing or video editing. It will not work in standard iMacs, MacBook Pros or any system that requires unbuffered non-ECC SODIMMs. Buyers needing higher capacity should look for larger validated kits.

Straightforward slot installation

Installation means opening the iMac Pro memory compartment and seating both 288-pin modules into the available slots. The registered design demands correct alignment; forcing a module can bend pins. No heat spreader is fitted, so airflow in the compact chassis remains unchanged.

How it compares

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

Price $37.99
Cheaper than about 81% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.75 per GB
Cheaper than about 80% 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 nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity8 GB (2 × 4 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Do I need a Late 2017 iMac Pro to use this 2666 MHz ECC RDIMM kit?

Yes, this 8 GB DDR4 kit is built for the iMac Pro 2017 (model A1862, EMC 3144) and its 288-pin RDIMM slots.

Can I mix these 1.20 V registered modules with any original Apple memory already installed?

The iMac Pro 2017 uses only ECC registered DDR4 at 2666/2667 MHz, so matching modules will run together at the same speed and voltage.

How can I confirm the kit is running at 2666 MHz with ECC active after installation?

Open System Report in macOS; it will show each 4 GB module at 2666 MHz, DDR4, ECC registered, and 1Rx8 rank.

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