I have an asus P4s533-mx motherboard that supports up to a p4 3mhz processor. Right now there is a 1.7mhz celeron on it. Would it make any difference to upgrade to a 3mhz, or would it not be worth the money to invest in one? My pc is running slow so I already upgraded my memory to 1gig. A bigger hard drive is next since this one is almost full. Anyone have any thoughts on this?