the only way to know if it works BW is firstly before you buy it email the manufacturer with details of the chipset and motherboard your using.
ask if your config is compatible.
try and buy on approval as well so you can return it and get your money back if it does not fit in with the pc you are using.
if you scan the net certain sound cards seem to have some problems while others dont. the first thing to do is find out what chipset you are using eg : SIS, VIA whatever and the make of motherboard.