Five small tools for the questions that come up when you build or upgrade a gaming PC. They run in your browser, ask for no sign-up and use the figures each maker publishes, with the source linked next to every number.
How many watts does your power supply need? Pick your processor and graphics card and the calculator adds their official power figures, a fixed allowance for the rest of the PC and a 30% margin, then rounds up to a size you can actually buy. It is the same math as the watts guide, so the two never disagree.
Will that graphics card, cooler or motherboard fit your case? The tool compares the length, height and size of each part with the clearances the case maker publishes and tells you in millimeters how much room is left. If the gap is small it marks it as tight, because cables and front fans take space too.
Is your processor holding back your graphics card? Instead of a made-up bottleneck percentage, this test has you measure GPU usage in the game you actually play. Type in what you saw and you get what to do about it, in order.
Can your PC run it? Pick your graphics card, processor and RAM and see, game by game, whether you meet the official minimum and recommended specs. The tool compares PassMark scores, links each game's requirements page and tells you what to upgrade when something falls short.
The power table lists the official power figures of current graphics cards and processors, each figure linked to the maker's spec page. It is free to use and cite, and you can download it as a CSV file if you want to work with the numbers yourself.
Every power figure, clearance and requirement is read from the maker's or publisher's own page, and each tool shows the date it was read. When a brand publishes nothing for a value, such as the power drawn by fans and drives, the tool says it is this site's own estimate.
No hardware is tested in a lab here. The tools do arithmetic on published specs, which is what most buying decisions need: whether a part fits, whether the power supply has headroom, whether a game's requirements are met.
Building from scratch? Start with the PC builder, then check the power supply with the calculator and the case with Will it fit.
Upgrading one part? Use Can your PC run it to see what falls short, and run the bottleneck test before you replace a processor that may not be the problem.