SpeedFan is a program which supervises the speed of the ventilators, the temperatures and supply the voltages of your computer, if it has functions of monitoring. SpeedFan can also reach hard information S.M.A.R.T. of the disk to post their temperatures. SpeedFan can even modify the FSB on certain mother charts. SpeedFan is a software of monitoring of hardware but its principal function consists in controlling the speed of the ventilators according to the temperatures recorded by the probes of your material, thus reducing the noise and the consumption of electricity of the whole of the system.