I have a radeon hd 7870. I was foolish to have believed an overclocking tutorial online that they guaranteed would be safe. I overclocked my card to the "safe limits" using the AMD catalyst control center and ran one of my games. A few seconds into it, it crashed. Afraid, I restored all settings to default in the AMD overdrive tab where I tweaked them. This was a week ago. I'd installed the latest 14.9 driver package after that in this week. My problem is whenever I play my games they now crash. Either when I'm about to exit them or while playing or when starting. Once even my chrome browser crashed. Some buzzing noise comes from within the computer whenever this happens. I switch it off as soon as it happens. Usually around the time this crash takes place, I get the BSOD but it disappears before I can take note of anything. what do you think is the problem and is there a fix? If one hardware unit is the cause of this can the others be affected too?