The present invention provides an ATX specification power supply comprising redundant power supply architecture. A casing where the ATX specification power supply is located includes an ATX specification housing and a frame provided in the ATX specification housing. The frame is defined with a plurality of power module assembly regions and a modulation module assembly region in the ATX specification housing. The power module assembly regions are for a plurality of power modules to be provided therein, and the modulation module assembly region is for a power modulation module to be provided therein. The plurality of power modules and the power modulation module are further connected to a power integration backplate provided in the ATX specification housing, enabling the ATX specification power supply to construct redundant power supply architecture.