Tools

Free, no signup. Every figure is read off a manufacturer spec page - where one isn't published, we say so instead of guessing.

• Power supply calculator

  How big a PSU this build needs - and whether the one you own has the cables your card actually requires.

• Will it fit?

  Whether a graphics card and CPU cooler can actually share your case at the same time - not just two spec-sheet numbers that both happen to say yes on their own.