Why Can't I Overclock My CPU? Screenshots

[samwow412]

It's all greyed out in my BIOS settings where it says CPU Ratio, how do I crank my 3.4 i7 2600k up to about 4.0-4.2 ghz

 

[footlong96]

Your bios cant do it. I believe asus needs to have an "AI Tweaker" tab.

 

[samwow412]

Your bios cant do it. I believe asus needs to have an "AI Tweaker" tab.

D: