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Green circuit board with black memory chips, 288 gold pins, no heat spreader

A-Tech

A-Tech 32GB DDR4 2666 ECC RDIMM for iMac Pro Late 2017

SKU CH-AZAY-46B2Z

32 GB DDR4 2666 ECC registered RDIMM module built for the 27-inch iMac Pro from late 2017

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • 32 GB single module expands iMac Pro memory capacity
  • DDR4 2666 MHz PC4-21300 matches factory speed specification
  • ECC Registered 2Rx4 design protects data integrity
  • 288-pin RDIMM form factor fits Late 2017 iMac Pro slot
  • 20 V low-voltage operation reduces power draw

Targeted Mac Pro Upgrade

This 32GB DDR4 2666 ECC RDIMM is built for the iMac Pro Late 2017 model A1862. It delivers registered error-correcting memory that matches the workstation's native PC4-21300 specification at 1.20V.

Single-Module Capacity Jump

The module replaces a lower-capacity stick to add 32GB in one 288-pin slot. The upgrade is worthwhile when the system hits memory pressure during rendering, virtualization or large dataset work and an empty or removable slot is available.

For iMac Pro Late 2017 Owners

Suits professionals expanding a compatible iMac Pro 1,1 running memory-intensive macOS workloads. Not for non-ECC consumer desktops, laptops, or any Apple system outside the validated Late 2017 iMac Pro line.

How it compares

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

Price $142.99
Cheaper than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $4.47 per GB
Cheaper than about 82% 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 capacity32 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will the 288-pin RDIMM module fit the iMac Pro Late 2017 memory slots?

Yes, the 288-pin RDIMM form factor matches the iMac Pro (Late 2017) memory slots exactly.

What is the correct way to seat the ECC registered module so the iMac recognises the full 32 GB?

Insert the module at a slight angle until the gold contacts disappear, then press down firmly until both side clips click into the notches.

Does the 1.20 V DDR4 2666 ECC RDIMM need any firmware update or periodic reseating over time?

No firmware update is required; the module is validated for the iMac Pro and only needs reseating if the system is moved or upgraded again.

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