Originally posted by: PuffDaMagicSamus
Because when you let software control your hardware, you are susceptible to the same things that can affect any piece of software on you computer(ie. virues, spyware, crashes, compatibility issues, etc.). Therefore there are things that can affect a sudden change in your OC and that is never a good thing. You want to be in complete control of what your hardware is doing. One prime example is using software to affect your CPU voltage. God forbid something goes wrong with it and your vcore spikes. Bad news.