i hav my sound problem since i have installed win xp to my system.please help my friends . my chip in motherboard id alc655 and another is rtl821bl.my friend told me to do it from motherboard but i did not had my cd or else i might hav done that .if u ll solve my prblem , i ll be very thankful to u all my friends and as well as yahoo answers .please give any solution or atleast suggest any website to download that.plz