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Two green 64GB DDR4 LRDIMM modules with gold contacts

A-Tech

A-Tech 128GB Kit (2x64GB) DDR4 2666 ECC LRDIMM memory upgrade

SKU CH-VTXK-B2TZQ

DDR4 2666 ECC LRDIMM kit adding 128 GB across two 64 GB modules for 2019 Mac Pro tower and rack models

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Compatible systemsApple Mac Systems
  • 128GB total capacity with two 64GB modules
  • DDR4 2666 speed rated PC4-21300
  • ECC Load Reduced for error correction
  • Designed for Apple Mac Pro 2019 8-Core
  • 288-pin LRDIMM form factor 1.20V

Mac Pro 2019 memory upgrade

This 128GB kit supplies two 64GB DDR4 2666 LRDIMM modules for the 2019 Mac Pro 8-Core in tower or rack form. It targets professionals who need to expand the system beyond its factory configuration for large datasets, virtual machines or multi-application workloads.

128GB ECC LRDIMM capacity and headroom

The two modules deliver 128GB total at 1.20V with ECC load-reduced operation. Four-rank 4Rx4 organisation lets the memory controller address the full density, while ECC corrects single-bit errors to maintain data integrity during extended compute tasks. Headroom ends when all twelve DIMM slots are populated or the CPU memory-controller limit is reached.

DDR4 2666 interface practical limits

The PC4-21300 interface runs at 2666 MT/s, so bandwidth is capped by that data rate and the 288-pin LRDIMM electrical specification. The memory controller in the 3.5GHz Xeon W-3223 defines the maximum supported frequency; modules rated at 2667 MHz will operate at the controller's 2666 MT/s ceiling. No higher DDR4 speed or different DDR generation is supported by this platform.

How it compares

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

Price $405.99
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 $3.17 per GB
Cheaper than about 89% 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 typeLoad Reduced
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will these 64GB LRDIMM modules work alongside the original Apple memory already installed in my 2019 Mac Pro?

The kit is designed for the Mac Pro 2019 (MacPro7,1) and uses the same DDR4 2666 ECC LRDIMM specification Apple requires, so it will operate correctly with factory-installed modules when populated according to Apple's memory configuration rules.

How can I verify the 128GB kit is running at 2666MHz with ECC active after installation?

Open System Information on macOS and check the Memory section — it will show each 64GB module at 2666 MHz, DDR4, ECC LRDIMM, confirming the correct speed and error-correction status.

Does the package contain only the two 64GB modules, or are any tools or risers included?

The box contains the two 64GB DDR4 2666 ECC LRDIMM modules only; no installation tools, riser cards or additional accessories are supplied.

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