EVGA 680i Mobo OC

[AznPoolPro]

I cant seem to find the setup to overclock my CPU on my EVGA 680i mobo. I can over clock everything else but my CPU. I can only overclock my CPU in Ntune but it seems to always freeze. On my Asus P5b i could overclock to 3.4Ghz but on my EVGA i can only go like 2.5Ghz on Ntune. I have a Intel Duo2 E6600 2.4Ghz. So you can see a 1Ghz overclcok wont satisfy me i want to get back at 3.4Ghz. Can someone tell me how to do this?