PC power and PSU wattage calculator
Add published component power figures and your own allowance for the rest of the system. This is an arithmetic subtotal, not a complete PSU recommendation.
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Formula and limits
Subtotal = (CPU TDP + GPU board power + your other-component allowance) × (1 + your margin ÷ 100).
CPU TDP is a thermal specification, not necessarily its maximum electrical draw. This subtotal does not model boost limits, transient loads, PSU efficiency, connectors or motherboard power. The build checker uses the site's more detailed sourced power records where available.