When I play some games my screens turn black and disconnect and it sounds like the audio freezes (it makes a loud buzzing noise). The only way out once my computer does this is a hard reset. I have a Sapphire radeon 7850 HD and I think it's my card. It didn't used to do it but it just started when I played bioshock infinite and has done it quite a few times while playing that game and once while playing league of legends. I re-installed the drivers and it still happens. What do I do? Is my card bad? I haven't even had it a year.