Thanks for the replies! Unfortunately I've got the P2B rev. 1.02 MOBO so I can't use a Coppermine CPU. At least that is according to Asus. So I had to search high and low to find a 600 'Katmai'. So if I can put this 133FSB cpu in the MOBO can I bump up the FSB freq to 133? Or am I destined to run it at 100? I have flashed the BIOS to rev 1011. Tried rev.1012 but the system kept hanging up.