EFI AMD 5700XT for Mac Pro 4,1/5,1
Another fine addition for your 4,1/5,1 Mac Pro. YOU MUST RUN 10.15.1 OR LATER FOR FULL FUNCTION ! The EFI will allow you to boot into older OSs with a single display to navigate and get some minor work done. You will want to install Catalina before the card comes.
Best in 10.6 or later.
There are NEVER power issues with these. A good way to transition into newer OSs and prepare for 7,1 Mac Pro. They should also function normally on a 7,1 when you make the jump.
These are made to order and will require 7-10 days .