I just upgraded to a new GPU, went from a Nvidia 2080 Super to a Radeon RX 6950 XT and I didn't upgrade my 750W power supply. I see some others on here had a similar problem and I was wondering if I need to go up to a 1000W power supply. I can start a game, but after 3-4 minutes my PC shuts down and I get a green screen on one of my monitors (the other one goes blank). I have to turn off the power switch and then when I reboot the displays aren't being recognized. I have to unplug my main screen and then plug it back in again. It also keeps switching the audio source as well.