On Sep 6,  1:36am, Bryan Vyhmeister wrote:
>with a full 68040. It now has a 33 MHz 68LC040 and I want to put in a  
>40 MHz 68040. Would that work? I am thinking it will not but I am  
>hoping it will. If that would work than I assume I could upgrade my  
>Quadra 650s to 40 MHz 68040 chips as well.

You can generally replace a CPU with a faster one, so long as the
replacement CPU's speed is equivalent to or faster than the system
clock speed.  Replacing a 33MHz CPU with a 40MHz part will work OK
(though the system will still be running at 33MHz unless you change
out the oscillator too).

~Steve