what is the default vpll voltage?

my q66 show 1,65v increasing to 1,7v didnt effect to mac cpu fsb but total clock.want to use more but not sure couse never play with it before any one can help

usualy cant post n spi1m at 450x9 now can even though its not stable on 3d

increasing the vtt cant pump my max fsb also i think my chip is not good enough still max at 470.already reach 1,75v vtt

thanks for all the mod johnny time to look for better cooling