I no longer have sound over hdmi via my 8800GT ( connected to sdpif) .... this problem started as I was updating BF Bad Company 2 and then all of a sudden i hear some screechy whiny noise coming from the PC.
I can however still get audio when I plug in my USB speakers.
Gah i think there's more to it than just the sound problem now.
Started playing Bad Company 2, and within a minute or so into the game... the computer would make that whiny noise again. Fired up DiRt2 and it crashed the PC after a minute or two into the game.
I've determined that it isn't my graphics card(at least I think it isn't!), as the noise is coming from around the upper half of my motherboard. So if that's the case is it fair to assume that i have either
a)a PSU on its last legs unable to draw the required power for the graphics card b)a poked motherboard c)CPU issues