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Four green DDR4 LRDIMM sticks with black heat spreaders and gold contacts

A-Tech

A-Tech 128GB Kit (4x32GB) DDR4 2666 ECC LRDIMM Mac Pro 2019 memory upgrade

SKU CH-CQFQ-TCTV3

A 128GB kit of four 32GB DDR4 2666 ECC LRDIMM modules built for the 2019 Mac Pro tower and rack models

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Compatible systemsApple Mac Systems
  • 128 GB total capacity from four 32 GB modules
  • DDR4 2666 MHz speed matches Mac Pro 2019 specs
  • ECC load-reduced design protects data integrity
  • 288-pin LRDIMM form factor fits Mac Pro 7,1 slots
  • Tested for Apple Mac Pro tower and rack models

Mac Pro 2019 ECC LRDIMM kit

This 128 GB kit contains four 32 GB DDR4 2666 modules built as ECC Load Reduced DIMMs for the 2019 Apple Mac Pro tower and rack models. It targets professionals who need maximum memory capacity in a certified Apple configuration.

288-pin LRDIMM form factor

The modules use a 288-pin LRDIMM design with ECC Load Reduced buffering, which is the single specification that determines compatibility with the MacPro7,1 platform. Standard UDIMM or RDIMM modules will not function in this system.

128 GB total capacity

Four 32 GB modules fill four slots and provide 128 GB of addressable memory for large datasets, virtual machines and multi-application workflows. The kit reaches the practical limit of this four-module set; additional capacity would require higher-density modules not included here.

How it compares

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

Price $756.99
Pricier than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.91 per GB
Cheaper than about 66% 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 (4 × 32 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeLoad Reduced
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will 2666 MHz DDR4 LRDIMM modules run at that speed inside a 2019 Mac Pro with the 3.5 GHz Xeon W-3223?

Yes, the Mac Pro 2019 memory controller supports DDR4 2666/2667 MHz and these LRDIMMs are validated for MacPro7,1 with that processor.

Does the ECC Load Reduced design on these 288-pin DDR4 modules require a specific Mac Pro firmware or macOS version?

No extra firmware is needed; the ECC LRDIMM protocol is native to the Mac Pro 2019 memory controller and works with the shipping macOS.

Will four 32 GB LRDIMM sticks fit the Mac Pro 2019 DIMM tray without clearance issues?

Yes, the 288-pin LRDIMM form factor matches the Mac Pro 2019 DIMM slots exactly and the kit is listed for MacPro7,1.

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