from what i understand, its not very reliable. the bios/mobo is your primary controller of hardware, and when a software comes in and tries to take over, things do really translate very cleanly. too many variables for software to control reliably. like cpu speed, nb and sb voltage, cpu voltage. and if thats the case, you have the chance to mess up your hardware. your bios is already set up to do this. why are you trying to deviate?