Energy-saving ATX computer power supply

The utility model relates to an energy-saving type ATX computer power, which consists of a high voltage rectification filtering circuit, a main power circuit, and a standby power circuit. The high voltage rectification filtering circuit processes an alternating commercial power into the high voltage direct current, the high voltage direct current is divided into two ways, one way is directed to the main power circuit, and the other way is directed to the standby power circuit. The standby power circuit comprises a standby power switch circuit and a standby power transformer, the standby power transformer is provided with two groups of output coils, wherein the voltage outputted by one coil outputs the + 5 VSB of a standby power after being processed though the rectification filtering circuit, and the voltage outputted by the other coil outputs an auxiliary power after being processed though the rectification filtering circuit. The standby power switch circuit can select an integrated circuit IC 4 including th