Just upgraded from a 2060 to the 6700 XT. Installed it, the pc booted. I'm new to pc building and should have checked what to do first, I admit. I did check device manager and task manager to see if it was being recognized, and everything was fine. I opened Overwatch, got a black screen, and now I have 0 display. Like at all. I put my old card in and same issue. On-board graphics aren't working either. I also tried with both dp and hdmi.
Specs:
Gigabyte X570 Gaming X
XPG Gammix D10 8GBx4 3000MHz
EVGA Supernova 850 Gold
Ryzen 7 3700x
EVGA Geforce RTX 2060 SC Ultra
AMD Radeon RX 6700 XT
Windows 10
Let me know if there's anything I'm missing, I can't use my PC at the moment.