GTX 670 Phantom overclocking

[leswhitham]

Hi all, just bought this card after been with ATI cards forever. Never been an overclocker either but I read that this card can be oc'd to about 10% over the manufacturers oc. So I'm using Expertool 8.1 and not exactly sure how to go about OCing it. Looks pretty simple but not sure how much I can go without blowing it up. When I press the overclock button I get

Graphics clock +0
Memory clock +0
Core voltage +0
Power limit settings 100%

Can anyone please tell me how far I should go with each of these controls?

Rest of my pc specs are as follows if required
P67A- GD55 with i5 2500k and Hyper212 cooler
12gb ram
750w psu

Many thanks

 

[OptimaLnrg]

get msi afterburner or evga precision x

-whack the power limit to max - it does bugger all
-you can't adjust the core voltage
-core clock and mem clock as per keplar overclocking guides