theoretically speaking, you can run as many soundcards as you like, as they all have separate drivers and separate resources assigned.

in practice, however, many of the system resources are shared and drivers have common files.

removing anything onboard and any other soundcards you're not using is a must for performance, and may be the solution if it isn't working at all....

Disable the onboard and the audigy....

That said, my PC sometimes get so twisted that a format of the disk and start again approach is the only thing that gets it going... :rolleyes: That could be your ultimate solution - and rebuild it without the additional soundcards.....