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Two green DDR4 RDIMM memory modules with black chips, no heat spreaders

A-Tech

A-Tech 128GB (2x64GB) DDR4 2666MHz ECC RDIMM memory upgrade for iMac Pro 27-inch Late 2017

SKU CH-15FH-VFHGB

128 GB DDR4 2666 MHz ECC registered RDIMM kit (2×64 GB) for 27-inch iMac Pro Late 2017

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2S2Rx4 (4Rx4)
  • 128GB total capacity with two 64GB modules
  • DDR4 2666MHz speed rated PC4-21300
  • ECC registered design for data integrity
  • Built for iMac Pro 27-inch Late 2017
  • 20V low-voltage operation reduces power draw

128GB DDR4 ECC RDIMM for iMac Pro 2017

This kit provides 128GB of DDR4 2666MHz ECC registered memory in a 2x64GB configuration. It uses 288-pin RDIMM modules operating at 1.20V with a 2S2Rx4 rank structure. The memory is designed specifically for the Apple iMac Pro 27-inch Late 2017 model.

Suits owners of iMac Pro model A1862 EMC 3144

This upgrade targets users who require 128GB of ECC registered memory for demanding professional workloads on the supported workstation. It is not for buyers who need non-ECC unbuffered DIMMs, different speeds, or memory for other Mac models or PC platforms.

ECC registered RDIMM format is the deciding factor

The iMac Pro Late 2017 requires DDR4 2666MHz ECC registered RDIMM modules; standard unbuffered UDIMMs will not function in this system. Verify your specific model identifier iMacPro1,1 and order number MQ2Y2LL/A before purchasing this 128GB kit.

How it compares

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

Price $533.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.17 per GB
Cheaper than about 83% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity128 GB (2 × 64 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Memory rank2S2Rx4 (4Rx4)
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Does the 288-pin RDIMM form factor fit the iMac Pro 27-inch Late 2017 memory slots?

Yes, the kit uses 288-pin DDR4 RDIMM modules that match the iMac Pro 27-inch Late 2017 memory slot specification.

What is the correct orientation when inserting the two 64GB modules into the iMac Pro slots?

Align the notch on each module with the key in the slot, press firmly until the side latches click, and install both modules for dual-channel operation.

Will the ECC registered DDR4 modules require any firmware updates or periodic replacement?

No firmware updates are needed; the ECC registered DDR4 modules are designed for continuous operation and do not have a scheduled replacement interval.

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