How can i overclock a insydeh20 bios - Computers & Internet

You cannot overclock using insydeh20 as the features that allow you to do this have not been written within the BIOS.
there are only two ways you could possibly perform an overclock.
One is to either flash your current BIOS with a different BIOS that does have these features but this is VERY RISKY and it could brick your device.
OR
use a program called setfsb or clockgen. NOTE: if your device is recently new (within the last 4 years) it will more then likely have a restriction on the motherboard preventing the CPU to be overclocked. The only way around this restriction is to perform a PLL pin mod which again is VERY RISKY and if not done correctly will cause unrepairable damage to your motherboard.