Undervolting Core 2 Duo E7500

hi all

I understand that this is quite the oppisite of overclocking but I think this is still the right place to post.

Anyway I want to undervolt my CPU because I think it should drop heat levels after about 1 hour at full speed. I am not sure with the stock voltage but I will look it up when I come back in 2 days.

So what am asking for is an approximent voltage where I can still run stock clocking.

My motger board is a ASUS P5P-Plus Vista edition and it can change voltages in 0.065V icrements I think.

Any help will be nice and thank you in advanced.