I got a Abit VT6X4 Slot1 board last week and put my PIII650(Slot1) on it. Replaced the PC100(ran at 124FSB= 806mhz). Today I replace the PC100 w/PC133 and when I change FSB to 140 (voltage at default 1.65)(to make 910mhz), It WILL post @910, but boots hafway into Windows, it just freezes halfway thru. My temp running the 650 @866(133FSB) is only 33 degrees C or 91 F. Would altering the voltage allow me to get my 140FSB? Any ideas would be appreciated. Email me at noel@noellucas.com if you want to. Thanks again.