Theoretically a 64 bit bus can take in twice as much data as a32 bit bus. This is all fine and well but leaves these questions to ask yourself among others. 1) Hard drive through-put, are you moving large amounts of stored data? 2) Max memory, are you doing memory intensive stuff like compiling, video or graphics? 3) Expansion slots or built in peripherals. 4) What are my needs for expansion? -- jludwig <wralphie@xxxxxxxxxxx>