The 80 Plus system is used to rate computer power supplies (PSUs) based on their reliability and efficiency. If you don’t understand the system, you’ll have to be lucky to avoid spending too much money or getting a too-weak power supply. The 80 Plus power supply rating system is simple and requires only a quick review to internalize. Related: Buying a Power Supply: Wattage, Efficiency and More 80 Plus Certification Levels 80 Plus Standard: At least 80-percent efficiency at all power levels and a power factor of 0.9 at 50-percent output.80 Plus… Read more