Maybe you have a problem with your soundcard because it has to share it's IRQ with the graphic card. Do you have an AGP graphic card? maybe you don't know but the AGP slot shares IRQ with the PCI slot 1. That's the one usually at the bottom of your board (inside a tower case). On most boards this PCI SLot shares a slot-hole with an ISA slot. That's for everyone to see, you just can't get in two cards at one slot-hole. But the thing with the IRQ is not so easy to see. This PCI slot is quite a bit away from the AGP slot but the IRQ is the same. you can't specify a IRQ for AGP in BIOS, it always uses the one selected for PCI slot 1.
Hope that helps.
Work like you don't need money,
Love like you've never been hurt,
And dance like no one's watching.