What do i do next for OC'ing?

[bradderzd1994]

I have managed to get 4.5ghz out of my i5 3570k at 1.25v. do i need to do anything else i heard about making the voltage go back down when idle

 

[amuffin]

Overclock with offset voltage.

 

[bradderzd1994]

Overclock with offset voltage.

What will this do? And also what shall i set for CPU Voltage Load Line Calibration