What about the voltage? Do you mean the voltage needs to be increased for overclocking? Yes and No, depends on the which CPU your using, Duron or TBird, on the default speed of the CPU, and how far you want to go. In most cases the CPU can overclock about 100mhz without a bump in voltage, sometimes more. I can get my Duron 700mhz to go to 900mhz at default voltage on my KT7-Raid.