Power supply control system for providing different outputs based on computer system working state

The present invention relates to a power supply control system for computer system. It includes a decision logical circuit, a voltage division control unit and a power supply circuit. The decision logical circuit is used for detecting state of computer system and outputting a decision voltage; and the voltage division control unit can be used for outputting a set voltage according to the decision voltage outputted by said decision logical circuit, said voltage division control unit includes at least two resistors and one switching circuit, the switching circuit can be switched on or switched off according to the decision voltage outputted by said decision logical circuit so as to make the voltage division control unit output said set voltage; and the power supply circuit can be used for producing an output voltage according to said set voltage and supplying it to computer system.