Corsair AX1500i

Best PC power supplies, by AnandTech

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.”

Here are the best power supplies available according to AnandTech.


300 to 400 watts

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400 to 600 watts

Seasonic SS-520FL2

Best performance

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600 to 800 watts

Corsair HX750i

Best performance

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800 to 1100 watts

Corsair RM1000x

Corsair RM850x and Corsair RM1000x
Best value

Seasonic SS-1050XP3

Best performance

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Over 1100 watts

Corsair AX1500i

Best performance

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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.

Source: AnandTech
Last checked on: 29 March 2016
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