what psu do i need for this gpu

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Titan
Moderator

Best case: the PSU shuts itself off without damaging anything - all ATX-compliant PSUs are supposed to aim for this and most of them usually succeed.

Worst case: the PSU blows your whole PC but survives, you unwittingly reuse that PSU in your "repaired" PC and blow that up too.

Alternate worst-case: the PSU makes fireworks and takes the rest of your PC with it.

Worst-of-Worst case: If you have a spectacular PSU or other component failure with unconstrained sparks and carpet or other flammable nearby materials that may act as tinder, your house may burn down if nobody is on-site to do something about it.