I'm running it on 800 Mhz. In fact, I think my pc is nearly the same as Nick's (mine has less RAM, though)
I get very low fps, especially in Vivec (especially with Vivec Expanded); it usually goes below 1, but I'm used to it, so it works for me
The thing is, music has always worked flawlessly for me nonetheless. :blink:
The entire game has always worked flawlessly for me (untill I started using XP, that is <_< ).