In its power supply guide, AnandTech says that “all switching PSUs have been designed so as to deliver their maximum efficiency at about half-load – about 50% of their rated maximum capacity.” It is a mistake to buy “a unit that will frequently operate near its maximum capacity” as well as “a significantly more powerful unit” than the system requires.
“With that in mind, while the recommendations of the online tools and calculators may be overestimated, they’re not overly so,” says the website. “Selecting a PSU near the capacity they recommend is not usually a bad idea, as the recommendation usually is twice the actual power requirements of the system.”
300 to 400 watts
400 to 600 watts
600 to 800 watts
800 to 1100 watts
Over 1100 watts
AnandTech is a technology website focused on hardware. It was founded in 1997 by Anand Lal Shumpi, who served as its CEO and editor-in-chief until 2014, when he left the company to work at Apple. Praised for its in-depth reviews, the website is a reliable and influential source of information for technology enthusiasts.
Last checked on: 29 March 2016