Created on: December 18, 2019
Last updated: April 19, 2022
Relevant Module Types / Base Modules:
Apple has provided an excellent resource for understanding the best way to pair modules in the 2019 Mac Pro, including mixed capacity pairs, and troubleshooting with 1, 2, or 3 modules. Please review their support page carefully before installing new RAM modules, specifically:
Some key takeaways from OWC:
Do not attempt to mix and match 'R DIMMs' with 'LR DIMMs'; this is not supported. If attempted the computer will not boot and the related LEDs will blink orange.