|Don't even bother trying. Laptops are a poor choice to try to overclock because of the limited space and cooling. All manufactured systems have their BIOS' designed so that they have limited adjustments so that cheaper choices in components do not begin to fail under the additional stresses of overclocking and the compromises that laptop makers have to make to balance price, speed, temperatures, run time, size and weight do not allow any reasonable margin of safety for these components.|
Overclocking should ONLY be done on a custom built desktop system where you have chosen components with more than a minimal safety margin (safe as in the component being over designed for additional stress against component failure) and sufficient cooling taken into consideration in the system design. Even then, there are guidelines that will need to be followed to help reduce the chances that you will have component failure related to heat, voltage, and compatibility. With care, the risk of these failures can be minimized, but cheap or poorly made components can take other more expensive components with them.
Laptops and overclocking to not mix and even the most experienced overclockers would not attempt it. If you need a faster laptop, purchase faster laptop. The only upgrades you can typically do is upgrade the amount of memory you have (if it is not enough) and upgrade from a conventional hard drive to an SSD drive.
You have to be a little bit crazy to keep you from going insane.