is this an additional sound card? (like a pci sound card)
or is it onboard? (built into the motherboard)
the easiest way to tell is to see where you plug the speakers in...
do you plug the speakers in somewhere near where the power cord of the computer plugs in? or down lower closer to the bottom of the box?
and to answer your question...the motherboard is the main board that holds everything that attatches to your machine. it should be listed as motherboard or mainboard. also could you list what shows up for chipset.