ABOUT

PSU Fit Check is a free power supply calculator and a set of plain-English guides. It exists because "what power supply do I need" shouldn't take an account, a forum post, or ten browser tabs. Pick your parts, get a wattage and a connector list, done.

Who runs it

I'm Manolo, a mechanic by trade, and I also love to build and repair PCs. Power supplies are where a lot of upgrades go wrong: the wrong cable, an adapter fed from one split cable, an old unit that can't handle a new card's power spikes. This site is my attempt to answer those questions properly, in one place.

Where the numbers come from

Every wattage in the calculator comes from the manufacturer's own spec: official board power for graphics cards, and the stock power limit for processors (Intel's PL2, AMD's PPT). How it works has the full method. New cards and CPUs get added as they launch, and numbers get corrected when a spec changes.

Found a mistake?

If a number looks wrong, a part is missing, or your card uses different plugs than the calculator shows, let me know and I'll fix it.

How the site pays for itself

There's no account and nothing to sign up for. The calculator runs in your browser, and your picks aren't sent anywhere. The site is paid for by ads from Google and by Amazon affiliate links: if you buy through a "Shop PSUs" button, I may earn a small commission at no extra cost to you. Neither one changes the numbers. Details are in the privacy policy.