It seems there is a problem (perhaps more) with this driver or this motherboard.
I also meet problem. (see my post about "nvaudio driver problem" for more information).
I wrote to nvidia support I received first reply to ask me if I used the latest driver but from one week I have no feedback.
Don't hesitate to write to support : more there is mails to ask upgrade more luck we have to have one.
Another question to ALL who read this thread and meet problem with lastest audio driver (nvaudio before it was i810*) inform us on the forum.
I am curious to know if some meet same problem as us with another motherboard.
power to GPL ...