A+ Tutorials Supplying Power to a ComputerA+ Tutorials - Supplying Power to a Computer
Before You Begin
Lesson 1: Power Supplies
Overview of Power Supplies
Power-Supply Sizes
Power-Supply Wattage
Power-Supply Connectors
Lesson Summary
Lesson 2: Power-Supply Problems
Power Failures
Power-Protection Devices
Power-Supply Problems
Lesson Summary
Tutorial Summary
Review
The power supply is an often-underrated part of a computer. Electronic components require a steady electrical current, free of surges or drops. The power supply is the part responsible for providing clean, constant current.