On Mon, 11 Dec 2006 12:01:11 -0700 "Ashley M. Kirchner" <ashley@xxxxxxxxxx> wrote: > Alan wrote: > > precisely I suspect > > because vendors didn't want people to be able to write software overclock > > tools intentionally or otherwise. > > > Wouldn't BIOS' that have this feature fall in this category? Or > that a different set of "people" that write software to over clock CPUs? The BIOS setup deals with the actual master clocks for the board (which are entirely board dependant and nobody else touches). They can set up overclocking. The general purpose interfaces for speed control (the ones Linux and Windows use) to the CPU don't allow that to be done. Probably if you overclock the CPU by say 20% all your other speeds are 20% higher than they should be, but that may well depend on the board. Alan