Hey there all,

I'm relatively new to the Mac Pro wonderland, but I had a key question: I currently have 2 AMD R9 295x2 cards, a 2012 Mac Pro 5,1 with dual X5690s, and an extra 1000w power supply I can power them off of. I've done a fitment check in CAD and it seems to work, so that shouldn't be a problem. The question I have is, how can I boot into Windows or Linux to fully utilize these cards, while still being able to run MacOS Mojave and Catalina? Would I have to have an RX 560 in storage when I wanted to boot into MacOS and just swap out one of the 295x2s or is there something else. The machine would primarily be run in Linux or Windows with MacOS on the system as secondary.