"As we mentioned above, this board was designed to give DFI some appeal in the overclocking community. Although not a jumperless design like that of an Abit or IWill, DFI does come through where it counts. To start things off, the user must select the Multiplier they wish to use through the dipswitches on the bios. A jumper must also be changed to select 100 or 133 front side bus for the default."
FULL STORY @ VIAHARDWARE (http://www.viahardware.com/dfiak75.shtm)