Just installed a 5750 and both of my screens went black on the catalyst 9.12 driver installation in vista 32 bit and stayed that way for 3 minutes so I hard rebooted. After a reboot it installed fine, and it seems to be working fine. I ran 3d mark 06 a few times and played burnout for a while. However, I'm concerned this indicates hardware issues that come back and bite me in the ass?