Questions on Overclocking?

[NUNCA]

Why don't companies like dell or gateway overclock their processors? How do you know if you can overclock your processor? How much hardware on your computer can you overclock? How do you overclock your processor? I pretty much need to no everything on overclocking.
Thanks

 

[Soldur]

I would recommend reading the sticky overclocking FAQ thread and/or doing a search for FAQs. Then ask any specific questions that you have.