Problems with the nForce APU

Greetings..

I'm having a few somewhat serious problems with the sound put out by my EPoX EP-8RDA+. Even with the newest nVidia chipset drivers, the sound is horrible. To be precise, except in Winamp, the sound goes wild: in some videos, the sound is playing at about 2x speed, or it skips a lot, while still playing a bit faster than normal.

In NFS:HP2, my own engine revs up in "stages". Amazingly, in tunnels, the sound is absolutely impecable. Weird, huh?
In Diablo II, a lot of sounds just vanish, the music skips a lot, the speech is like I described earlier.

Although i'm not sure, this might also be the reason why, in EuroLeague Manager, the players move in bursts, i.e. they run for about .5sec, they freeze for .3-.5sec, the run again for abot .5sec etc. (The game runs quite smoothly on my old P166MMx..)

I even tried the Realtek ALC650 drivers. They fix the sound problems, but (i think) it disables the APU in the MCP-T, and, of course, the SoundStorm control panel is unusable, being replaced by the awful ALC650 configuration panel (wich is just an oversized window for 2-3 buttons..)

If anyone can tell me of a fix, or direct me toard some useful links, I'd be ever so grateful.