Im afraid to play some games i play witcher 3 for 2 hours and my gpu reaches 76 degrees but i have overclocked it from 900 mhz to 1050 core and from 1200 to 1415 memory , is that temp too high for a sapphire 7850 and ambient temp 35 degrees celcius? i cleaned it some time ago but i didnt change paste cause its risky for a gpu like this.