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

Connecting Power Supplies in Parallel or Series for Increased Output Power

Computer Power Supply Wattage

What are the standard output voltages of a computer's power supply? How? Why? - Quora

HOW TO CHOOSE A POWER SUPPLY TO THE PLC CONTROLLER - Blog related to industrial automation - PLC, HMI, control systems

What do power supply efficiency ratings actually mean? - Quora

POWER SUPPLY BASICS – Wavelength Electronics

CE high watts switching power supply safe package 800w from makerele china factory SCN-800-12/24/48

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

300 Watt ATX Replacement Computer PC Power Supply

Power Man FSP235-60GI 235 Watt 20-pin ATX Desktop Computer Power Supply

5 Things to Pay Attention to When Choosing A Power Supply