no. the screen won't work at the very least. from what i've seen, as long as the back panel is modified accordingly, anything over the 666 can be swapped about with anything between 666 and 1ghz. -Jason Economou Carbotron Composites On Feb 15, 2005, at 1:47 PM, Michael Sherwood wrote: I have a first generation Ti-Book 500 mhz that I need to replace the motherboard on. Will any other motherboards work, say on the 667 mhz? Or am I stuck? Mikey _______________________________________________ Titanium mailing list Titanium at listserver.themacintoshguy.com http://listserver.themacintoshguy.com/mailman/listinfo/titanium