<I once had a PC/XT overclocked to 25 or so MHz. It caught fire... <Basically, I just pulled the chip marked 25 MHz from a dead 386 <and put it where the XT's ship was. It took about 10 minutes to start em I find this a good story. ;-) The fastest 8088 ever made was 10mhz if you squint it may hit 12. As far as putting a 386 in a 8088 socket...there is the matter of the 100 or so extra pins. Oh, if the 25 mhz clock was input to the 8284A then the cpu clock would be 8.333mhz... almost believable save for the rest of the logic on the xt board would not generally run that fast without adding waitstates. Allison