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PSU Wattage Calculator

Estimate the power supply wattage your gaming PC needs from your GPU and CPU, with headroom for transient spikes.

Rough GPU board power

GPU classBoard power
Entry (x50 class)75 – 130 W
Mid range (x60 class)130 – 200 W
Upper mid (x70 class)200 – 285 W
High end (x80 class)285 – 360 W
Flagship (x90 class)360 – 600 W

Frequently asked questions

Is a bigger PSU always better?
Not always. A supply running near 50% load is close to its efficiency peak, but an oversized unit costs more for no performance gain. Aim for roughly 1.3× your sustained draw.
Why do GPUs need extra headroom?
Graphics cards pull microsecond spikes that can be nearly double their rated power. A supply sized only to the average can trip its protection and shut the PC off mid-game.

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