Nid sifu here,
I am very noob on Overclock, what i do is just follow the tutorial from youtube here the link: <http://www.youtube.com/watch?v=R0wN3W_BzhY>

Today try to follow the tutorial overclock my processor to 4.0 Ghz, luckily it work. I will list out what i did on BIOS, Sifu please have a look is there any wrong?
1. CPU ration (Auto>Manual) set to 40
2. Internal PPL OverVoltage (Disable to Enable)
3.Turbo boots power limit (Auto> Manual)
3.1 Short Duration Power Limit set to 150
3.2 Long Duration Power Limit set to 150
4.Spread Spectrum (Auto>Disable)
5.Cpu Core Voltage (Auto>Offset Mode)
5.1 Offset Voltage +0.015V

Tat all i mod in BIOS Setting. Currently PC is running 4000.07 Mhz from Real Temps GT. Also, i run Prime95 as well. But i dunno exactly what to choose for the setting. I just choose Blend.

My spec is:
MB: Asrock Z68 Extreme 4
CPU: i7-2600k

Please sifu give some recommendation