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

5 Things to Pay Attention to When Choosing A Power Supply

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)

How to Check the Power Supply on a PC

electrical - What is the difference between Input and Output values on power adapters? Which one represents the amount of power being drawn from a circuit? - Home Improvement Stack Exchange

How To Choose an LED Power Supply - LEDSupply Blog

5 Things to Pay Attention to When Choosing A Power Supply

Switched-mode power supply - Wikipedia

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

How PC Power Supplies Work

Power Supply Ratings Fully Explained (2022 Guide)

How to Check Power Supply Wattage and Find the Right PSU For Your Needs

MiTAC 145 Watts AC Input Power Supply Mfr P/N X-145C