A little bit of Background: Earlier this year (ouch) I bought a used RTX 2080 Super and just recently a used Ryzen 9 3900X + Gigabyte X570 Aorus Elite. Both GPU and CPU were in good condition and have worked fine for the last couple of months.
Yesterday I put my PC into standby and left it for a few hours. When I came back and hit the power button, it didn't do anything except ramping up all fans. I waited a couple of minutes and then eventually pushed the reset button.
Nothing. No button would work so I turned off the power supply and turned it back on. I tried booting but again, only the fans would ramp up. After a bit of troubleshooting I found out that when booting my PC without GPU, powering it off, putting the GPU back in would do the trick and my PC would boot.
The problem: I have to do it whenever I wanna boot my PC, its pretty annoying and I don't think its entirely good for my PC's health.
Any ideas whats wrong? I suppose its my power supply (be quiet! S8-600W), besides my ram it's the only component that I haven't replaced in years, wanted to that anyway.