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

Three Golden Rules for Choosing a Power Supply (No Maths!) - Tutorial Australia

Power your computer with this reo atx-700w power supply, it supports single pci express, supports five serial ata and features over voltage protection

REO 700 Watt SMPS with 5 Sata (Total Output Power 300W)

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Aopen FSP235-60GT 235W Watt ATX Computer Switching Power Supply PSU PC

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