So about a week ago i installed my shiny new 6950 to start mining and i noticed that i no longer had sound. So, i googled around a bit and tried a couple different fixes: changed onboard audio from auto to enabled, reinstalled drivers, uninstalled drivers, etc. But i still havent had any luck. My "Playback Devices" in windows shows only the hdmi audio from the video card ("ATI DP Output"). SCII for a week with no sound =  . Any thoughts?

System Specs:
AMD Phenom II X4 955
ASRock 880GXH/USB3 AM3 (onboard R4250)
CORSAIR XMS3 4GB
MSI Twin Frozr III PE/OC R6950
WD Caviar SE16 500GB x2
Cooler Master HAF 932
CORSAIR 650TX
Windows 7 (64-bit)