I have an Asus r9 390 Direct Cu ii (not overclocked) with an Intel I5 6600. After 20-30 mins of playing it reaches 95 degrees. My fan configuration is set to auto and the fans are spinning at 60%. My case has 2 front 12cm intake fans and 1 rear 12cm exhaust fan. They are in a push-pull configuration,so i don't think that the case fan is the problem.