I got a HP 4550Z with a micro atx mobo (dont ask me, its what i been told) a celeron 466 and 64 mb. I was told i could upgrade mobos and get a athlon or p3 at around 800-1 gig. However, they didnt know if my power supply from this old computer from 98 would fry a new mobo i put in. It says 100w max continuous on the outside of the power box thingy. Can someone please tell me what micro atx mobos I could upgrade to, or if I could even, that would allow me to get a faster processor and crap? Thanks.