Dude , furmark is for GPU stress test , not CPU . Same for 3 dmark . So you are essentially frying your GPU while measuring CPU temp . Those won ' t stress you CPU that hard , not even demanding as , says battlefield . But whatever , as long as you can run the progam that you bought your CPU and GPU for , it is fine . Like I said , you only need the minimum stability to run your desired program . No need to run overnight test . Why subject your PC to 8 h of torture just so you can satisfies a program that you will uninstall straightaway ? Just fire up some game or application and process with your daily use as normal . If you game 8 h day , run your game 8 h , if you want 247 usage , run it 247 . No more no less . More importantly , keep track of your temp . At NO point in time should temp exceed 80 .