"The DVD266-R features IWill's Smart Setting which allows Voltage and front side bus controls via the Bios. The overclocking options include the ability to adjust the front side bus from 66 to 200 in 1 MHz. increments. Another interesting option, is the ability to adjust the vcore up to 2.05"
FULL STORY @ VIAHARDWARE (http://www.viahardware.com/dvd266.shtm)