Question GPU Switch from Nvidia gtx 960 to Amd Radeon 5700XT, Fans dont start spinning and i get no display output.

[schkuti]

Hey, as the Headline is saying i tried upgrading my pc today and ran into problem after problem. At first i tried just switching the card out, (which usually works?). The amd card gets no video output whatsoever, but at the same time i started noticing that i dont get any output on the onboard display. Tried it in 2 seperated systems now which were both running before. Any idea how i can troubleshoot this in any way shape or form.

 

[rgd1101]

full system spec? include brand and model of the psu