resently i bought new gpu GTX 1070 8gb and it had pretty good performance on ultra graphics every game i played like: Witcher 3 , PUBG , NFS payback , etc . 2 weeks ago i played pubg on ultra graphics 60+fps and had no problems. then i uninstalled it and yesterday installed it again and have 40-50 fps on every graphics i set no matter its very low or ultra , i thought it was because of game or driver update , but i tried recent driver and it didn't fix the problem. then i tried other games and every game has fps drops, sometimes i have 8 fps . so i dont understand what is the problem .