Gpu Wattage Calculator -

RTX 3070 (220W) + Ryzen 5 (65W) + 100W = 385W × 1.25 = ~480W minimum → get a 550W–650W PSU.

Picking the wrong power supply can cause crashes, shutdowns, or worse — fried components. Here’s how to calculate exactly what your GPU needs 👇 gpu wattage calculator

GPU TDP + CPU TDP + 100W (mobo, RAM, drives) × 1.25 (headroom buffer) RTX 3070 (220W) + Ryzen 5 (65W) + 100W = 385W × 1