o/c with msi 850 pro

Hi I am completley new to o/c and i dont want to take it to an extreme but i have a msi 850 pro and a p4 1.4 and would like to jump to a 1.5 or something to help a little with ut2003 and when i adjust the multilier it doesnt do anything and still reads the same? Is there a jumper or something to move to unlock it or am i missing something?

All P4s are multiplier locked, so you would have to raise the Front Side Bus (FSB) to overclock your CPU. Welcome to the forums.