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Journeyman III
Journeyman III

RX 580 card not powering Cinema Display

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?


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