I have an extra desktop that i installed win 7 pro 64 bit on. The components of the system are a P5RD1-VM motherboard, Pentium 4 3.0 ghz processor HT, 2 gigs of OCZ ram, and an ATI sapphire 1950 pro 256. The problems that I am having are that it does not recognize the onboard sound, but it does recognize the S/Pdif even though it is not connected. The other problem is the 1950 pro is not recognized in my device manager even when I download and install the newest drivers from Sapphire. The odd thing is when I hook my display up to my motherboard it recognizes the display where as the 1950 pro does not.
Also, when I download and install the catalyst control center and restart my computer, it is not there.
according to ASUS's website, your motherboard doesn't have support for Windows 7 (doesn't even have full support for Vista).
Try a google search for ADI1986A SoundMax audio drivers (the audio device on your board)