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Four green 288-pin LRDIMM modules with black chips

A-Tech

A-Tech 256GB (4x64GB) DDR4 2666MHz ECC LRDIMM 288-Pin for iMac Pro 27-inch Late 2017 memory upgrade

SKU CH-C921-BK8PW

A 256 GB kit of four 64 GB DDR4 2666 MHz ECC LRDIMM modules for the 27-inch iMac Pro Late 2017

  • Capacity256GB (4 x 64GB)
  • SpeedDDR4 2666 (PC4 21300)
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredLoad Reduced
  • Rank4Rx4
  • 256GB total capacity with four 64GB modules for maximum multitasking headroom
  • DDR4 2666MHz PC4-21300 speed matches iMac Pro Late 2017 specifications
  • ECC Load Reduced DIMM technology provides error correction for data integrity
  • 288-pin LRDIMM form factor designed specifically for Apple iMac Pro 27-inch
  • 20V low-voltage operation reduces power consumption and heat output

256GB DDR4 2666MHz ECC LRDIMM Kit

This 256GB kit contains four 64GB DDR4 2666MHz ECC LRDIMM modules built for the iMac Pro 27-inch Late 2017. It uses a 288-pin form factor and operates at 1.20V with a 4Rx4 rank configuration. The load-reduced design helps maintain signal integrity across all four slots.

Suits iMac Pro Late 2017 owners needing maximum

This kit matches the Apple order number MQ2Y2LL/A and model identifiers iMacPro1,1 and A1862 (EMC 3144). It is not for standard iMac models, Windows PCs, or systems that require unbuffered UDIMM or standard RDIMM modules. Buyers who need a different capacity or form factor should look elsewhere.

256GB capacity handles heavy professional workloads

Four 64GB modules fill the available slots and provide headroom for large datasets, virtual machines, and multi-application workflows. The DDR4 2666/2667MHz speed (PC4-21300) supports the platform's rated bandwidth. ECC load-reduced operation protects data integrity during sustained use.

Punti di forza

  • 256GB total capacity with four 64GB modules for maximum multitasking headroom
  • DDR4 2666MHz PC4-21300 speed matches iMac Pro Late 2017 specifications
  • ECC Load Reduced DIMM technology provides error correction for data integrity
  • 288-pin LRDIMM form factor designed specifically for Apple iMac Pro 27-inch
  • 20V low-voltage operation reduces power consumption and heat output

Caratteristiche tecniche

BrandA-Tech
SeriesA-Tech DDR4 Apple Mac RAM Memory Upgrades
Capacity256GB (4 x 64GB)
SpeedDDR4 2666 (PC4 21300)
Voltage1.20V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

Domande su questo articolo

What system must I already own to install this 256GB DDR4 2666MHz ECC LRDIMM kit?

This kit is designed for the Apple iMac Pro 27-inch Late 2017, model identifier iMacPro1,1 and order number MQ2Y2LL/A.

Will these 4Rx4 LRDIMM modules work alongside any original 64GB sticks I keep in the iMac Pro?

The iMac Pro has four slots; this kit fills all of them, so any original modules must be removed before installation.

How can I verify the 256GB DDR4 2666MHz ECC LRDIMM kit is recognised correctly after installation?

Open About This Mac or System Report; it should show 256GB total memory at 2666 MHz with ECC enabled.

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