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What wattage power supply does your computer need?

Pick your parts - we will work out the approximate load including processor and graphics card peaks, add a solid margin and show suitable power supplies with today's prices.

What wattage power supply does your computer need?

Want the full analysis with FPS and bottleneck? Try the FPS calculator.

How we calculate it

  1. We multiply the processor TDP by 1.4 (boost peaks) and the graphics card by 1.2 (short spikes), add ~60 W for the motherboard, RAM and peripherals, plus a few watts each for drives and fans.
  2. Recommended wattage = load + 20% headroom, rounded to the nearest 50 W - or the recommendation from the graphics card manufacturer, if that is higher.
  3. If the graphics card uses 12VHPWR (RTX 40/50 series), choose an ATX 3.0/3.1 unit with a native connector, no adapters.

The figures are approximate - the real load depends on the specific models and the type of workload.