If your duron chip is a 100fsb chip, the ECS makes a pretty good OC'ing board. Just bump the FSB from 100 to 133. Which would trun a 650 into a 864, or a 700 into a 931. Hay it ain't great but it can so that, aslong as your chip is happy with its voltage or if you connect the all the voltage bridges to force it to run at 1.85v.