Well, actually you can use a combo setup. In my case, I set voltage and multiplier (well, only works this way), using jumpers/dips, and fsb trorough bios setup. You can do it setting to jumperfree, but still setting with dips/jumpers. It's the best adjustaments I acomplished. Due to issues with bios 1005C (at last with me) and rev 1.02 boards, everytime you boot up, the jumperfree voltage settings in bios are reseted to default, crashing your overclocked system! I don't tryed with older bios. I'm just waiting to the 1005D. :'(