PSU wattage calculator

Pick your CPU and graphics card. We add the rest of the system and 40% headroom.

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How it works

Load = CPU TDP + GPU TDP + 50 W for board and memory + 6 W per drive + 3 W per fan. The recommendation adds 40% headroom for spikes and ageing, rounded up to the next 50 W, never below 450 W. An overclock adds 25% to CPU and GPU. If a part has no listed TDP we assume 65 W (CPU) or 150 W (GPU).