I'm from Germany by the way if you want to answer me in German.
I finally assembled my PC yesterday.
Sapphire Nitro + 5700XT
but whenever I install the drivers it changes the resolution to 680x480 P. I have tried everything. I installed an older version of Windows (Adrenalin 2020 Edition 20.4.2) and of course the newest one... neither works! before I install the drivers everything runs on FULL HD without problems. The problems occur directly after installation and restart of the drivers