a friend opf mine has an old athlon 800. the first series that come out. bought it in august of 2000. in his bios he is able to change the FSB a lil not very much we made it run at 850 or so fine. there is no way to change the multipliker. what he is woundeering is if he gets the latest bios updates and such if there is a way to "unlock" his processor to get more overclocking out of it. anyhelp woudl be good