I have this problem , I bought a new video card Gigabyte Radeon Rx 570 last July 31, 2020. After installing all the drivers, I tried to run games like (DOTA 2) with my browser or some multiple tabs then after I ALT TAB suddenly a glitching or some others called garbage display occurs. I did reinstall the driver and it run well for like a minute then went on garbage display again and after that my computer shuts down on its own. But for now, sometimes when you are using it for about an hour or 2 it goes garbage display again and blackscreen,also it freezes ( i checked it by pressing the caps lock button and see if the LED light flashes). How will I fix it? Did you the gpu I bought is defective? because this gpu is brand new should I returned it or what? Please help me.#
NOTE: the photo below is from google but its same what i experience a diagonal glitching happenings on my pc
