Power supply calculator

The power supply feeds every part of your PC. Too small and the PC can switch itself off in games. Choose your parts and we will suggest a sensible size.

1. Processor Everyday 4 to 6 core (Ryzen 5, Core i3, Core i5 without a K) Mid-range (Ryzen 7, Core i5 K, Core Ultra 5) High-end (Ryzen 9, Core i7 K, Core Ultra 7) Top-end (Core i9 K, Core Ultra 9)

2. Graphics card

Not listed? Choose the nearest one, or ask us.

3. Anything else? How many drives (SSDs and hard drives)? Lots of extra fans or lights (RGB)

Why not just buy the biggest?

A bigger power supply is not faster. It only needs to be big enough with some spare. Quality matters more: a good one gives steady power and protects your parts. Every PC on this site lists its power supply in the details, so you can check.

Thinking of adding a stronger graphics card to an older PC? Read upgrade or buy new? first, or ask us about an upgrade.