When Windows starts up it automatically gives me a blue screen, one without an error, or the device irql not equal to or whatever. Thats when I have my fsb at 137. I think it may be because my multi is set at 12 (1.61ghz). Who knows. Another wierd *** thing is, when I set the jumper on the mobo to 166 fsb, it loads as 100mhz, and when I set it to 100mhz, it doesn't boot. Does anyone know if Gigabyte made the bios so you can't change the fsb higher than the ram clock? :\ The only working fsb is 133, and it goes up to 165mhz so I can't hit the divisor. Could it be the pc2100 ram?