While just trying to play fortnite (i know lol) my cpu cant even hit 1ghz, and fortnites a cpu main game so, gpu is running fine. I have a h80i cpu cooler and it idles around 40-50. its's making it really hard (i mean I can't even have 3 chrome tabs open at once. ( i5 8400, i know it isnt the best cpu but its what I had to get when I built.