fsb and multiplier

i want to know what is the different between increasing the fsb and multiplier?if i want to overclocking,can i just increase the fsb or multiplier?i am using amd thunderbird 1.33ghz.mobo is MSI K7T Turbo2.if fsb too high,whaT will happen?

this is probably a little too simplified but i'm sure someone can explain in detail for you. Your CPU speed is equal to your FSB*Multiplier. Basically if you want to reach a certain speed, it is possible to just increase the fsb until the fsb*multiplier reaches your goal. However, upping your fsb too high will cause instability. So usually what is done is lowering the multiplier to compensate for the increase in fsb.