Yes it is usually used when BIOS overclocking can't be done (like mine) and mainly for OEM computers.
I have a laptop that I bought from a friend and he had it over clocking and it over heats alot. Do you know a way to set it back to what it was factory set at? If you know or know anyone that does, please reply to firstname.lastname@example.org thank you for your help. it is a HP pavilion dv4-1225dx