if i want to build my own pc and buy all the parts seperatly including the cpu, do i have to set the cpu clock speed before turning the pc on for the first time? clock speed is fsb(which is inside the cpu) multiplied by the clock multiplier(switches on motherboard).
 what happens if i don't set the clock multiplier? will the cpu run at a certain speed programmed in by the manufacturer, or will the bios automatically come up and tell me to set the clock multiplier in there?