hello list would someone explain to me the role of the multiplier jumper. all I know is that the motherboard use it to multiply with the bus speed jumper tp get the cpu speed. i don't really understand how does it work. and why is it so important for the mother board to know the cpu speed since everything connected to the bus is going to run at a specific speed. TIA Sami PCBUILD only works if you contribute. Send your messages to be posted to: [log in to unmask]