What distro and version are you running? Redhat 9, SuSE...
Are you trying to use the NVIDIA drivers?
The nForce chipset motherboards requires some special configuration in many cases.
You have souund working? Did it work on install, or did you have to do some work on this?
I'm interested, as I just got one of these nForce boards and are having varying results, depending on the distro.