overclocking gpu need more voltage

[Dimitri Gongliashvili]

i am overclocking my gt640 asus edition (i have a 450 watt psu) so i need more voltage in my gpu so if i will buy a more powerful psu can i raise my voltage more ? (will the voltage max raise ?)

heres a screenshot http://www.picz.ge/img/s3/1307/29/e/e2ef9d9633a0.jpg

and yes i have a great cooling system so there's no problem about overheating

 

[Tradesman1]

What PSU do you have now