Are computer power supply ratings the input or output wattage

After looking at some of the draws of the typical desktop computer system I am confused by power supply ratings which seem to be excessive. The big item in a desktop computer, the CPU typically ha

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A reliable upgrade or replacement power supply for desktop PCs., This power supply offers an upgrade or replacement to a variety of Intel

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Primary Output Voltage (VDC): 119 Output Current (Amps): 2. 1 Maximum Output Power (Watts): 249. 9 Input Voltage (VAC): 90 to 305 Input Frequency

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