My PC specs are as follows :
Intel C2Q Q6600 @ 2.844Ghz (stock HSF)
XFX 780I motherboard
2GB Corsair XMS2 Dominator RAM
A single BFG 8800GT OC
700W Thermaltake Toughpower PSU

I have no problems with audio in any other games I play which includes Crysis, the orange box, supreme commander, company of heroes which are a lot more demanding than the 2 games im experiencing the problems with. Im guessin it must be the cruddy onboard realtek audio which I intend replacing soon I was fancying an X-FI however I have heard the Auzentech cards are meant to be better have you any idea which is the better of the 2 parts?? thank you