The power supply is the most vital component inside your desktop PC. This single part takes alternating current (AC) from your power outlet and converts it to a more reliable direct current (DC) that all PC components can use. The PSU also has numerous safety measures available to protect the PC from power surges, drops, or other changes in delivery. When looking to build a gaming PC, you must choose the right PSU for the job, especially when considering more powerful graphics cards. Here's everything you need to know.
Source: xda-developers.com