did the reg file and rebooted and the system crashed...getting BSOD every startup, it's in a loop

Started mining the other day on my Haswell E3-1230. Wanted to throw in a gpu to the mix. At 100%GPU I was having some major issues. You see, this isn't a really quality card (Power Cooler 7850)...but when it did mine I got 7-8 hash. My cpu mined like a beast with no errors (9hash @ 7 threads). This is a workstation that is used as  basic PC most of the time. So when I added the 7850, I took it down to 6 threads...still 9hpm. When I increased power in catalyst by 10% and decreased the clocks to 800/1150 and set GPU_MAX_ALLOC_PERCENT=80, I got less crashes, getting 7.5hpm. Playing video or doing anything java script crashes the driver. Is this normal? I'm running catalyst 13.12, should I get an older driver? Is it a driver or hardware failure? I have run the reg file every time the crash happens.