One of them called ClockGen. Basically the util would OC through windows using whatever on the fly methodology it uses. It is not permanent to bios though.
Thing is, software like can't increase the volts if needed and you don't want to lose control of an OC by letting a util do it for you. BIOS is your friend. Any OC'ing has inherent dangers to the components of a Rig, but that is the risk we take. Done correctly, it is a joy to behold. These days the benchmark to start with is easier with modern CPU's with speed ratings etc... BUT the risk is still the same to the components within and it is all too easy to fry something.
My advice is don't bother if this is just a curious kind of question
