Hi Folks, I just installed a refurb RX 580 into a mid-2010 Mac Pro. Card has power, as evidence by its fans running....
I have it hooked up to an Apple Cinema Display via, mini display port adapter to the Display Port on the card.
I reset PRAM and SMC.
The video card will not bring the monitor to life.
My first thought is a DOA card, OR the card doesn't like how I've hooked it to the monitor.
Thoughts or ideas?