you can put the 8500 into the Digital Audio, but you won't be able to put original card from the DA (the one with the ADC) into the sawtooth...i think. the card with the ADC has an extra connection on the card which fits into a slot in ADC equipped motherboards; the sawtooth didn't have that. i don't really know if the card will physically fit into the sawtooth AGP slot, but if it does, then the ADC port on the card won't be functional.