We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular circuit board with gold edge connectors and black memory chips, no heat spreader

A-Tech

A-Tech 64GB DDR4 2666MHz ECC RDIMM 288-Pin iMac Pro Late 2017 Memory Upgrade

SKU CH-JQDW-6F9EJ

A 64GB DDR4 2666MHz ECC registered DIMM for upgrading a 27-inch iMac Pro from Late 2017

  • Capacity64GB
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • Rank2S2Rx4 (4Rx4)
  • 64 GB capacity expands multitasking headroom for demanding workflows
  • DDR4 2666 MHz speed accelerates data throughput for responsive performance
  • ECC registered design detects and corrects memory errors automatically
  • 288-pin RDIMM form factor fits iMac Pro Late 2017 memory slots precisely
  • 20 V operation reduces power draw while maintaining stability

System-Specific 64 GB DDR4 Module

This single 64 GB DDR4 2666 MHz ECC registered DIMM is built for the Apple iMac Pro (Retina 5K, 27-inch, Late 2017). It targets owners of that specific workstation who need to expand memory capacity with a module validated for the platform.

Registered ECC with 4Rx4 Rank

The module runs at DDR4 2666/2667 MHz (PC4-21300) with 1.20 V operation, ECC registered signalling and a 2S2Rx4 (4Rx4) rank configuration. These electrical and organisational parameters must match the iMac Pro’s memory controller requirements for the system to recognise and stabilise the upgrade.

Direct DIMM Slot Installation

Installation consists of opening the iMac Pro’s memory access door and seating the 288-pin RDIMM into an available slot; no heat spreader is present, so clearance is not a concern. Builders who need more than one module must verify the total slot count and maximum supported capacity for their exact model before purchasing additional units.

Highlights

  • 64 GB capacity expands multitasking headroom for demanding workflows
  • DDR4 2666 MHz speed accelerates data throughput for responsive performance
  • ECC registered design detects and corrects memory errors automatically
  • 288-pin RDIMM form factor fits iMac Pro Late 2017 memory slots precisely
  • 20 V operation reduces power draw while maintaining stability

Specifications

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity64GB
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank2S2Rx4 (4Rx4)
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Questions about this item

What does the 64GB capacity mean for my iMac Pro Late 2017 in daily use?

A single 64GB module adds that full amount to your iMac Pro (Retina 5K, 27-inch, Late 2017), letting you run larger datasets, virtual machines and creative projects without hitting memory limits.

How does the DDR4 2666 PC4-21300 spec translate to real bandwidth on this machine?

The module runs at 2666/2667 MHz delivering up to 21300 MB/s peak transfer rate on the iMac Pro's memory controller, matching the system's native DDR4 speed.

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

Yes, this 288-pin DDR4 RDIMM is built to the exact mechanical and electrical spec for the iMac Pro (Retina 5K, 27-inch, Late 2017) model A1862 (EMC 3144).

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.