I recently had a problem with my PC where it would turn off and then wouldn't turn on again. After taking it to Microcenter, they diagnosed a faulty power supply and I ordered a replacement. However, after installing the new power supply, my PC ran for a few minutes before the issue returned. The only way I can boot it up now is by removing the GPU. I'm trying to figure out if this indicates a bad GPU or a faulty PCIe port. Any advice on how to diagnose either issue would be appreciated, since I don't want to have to rely on Microcenter again.
2 Answers
Make sure to share your system specs, especially what brand and model of the replacement PSU you have. And hey, let's hold off on calling anyone 'morons' until we get to the bottom of this. If your replacement PSU turned out to be a total dud, then it wouldn't reflect well on you to throw shade.
From what you've described, it sounds more like a power issue than a GPU or PCIe slot problem. Usually, if the system shuts down and won’t boot again until the GPU is removed, it’s indicating that something’s tripping a protection in your power supply. A defective GPU could be a culprit, but a weak or faulty PSU is more likely, especially since you've previously had power problems. Also, PCIe slot failures are quite rare and they tend to cause instability rather than complete shutdowns.
You could test the GPU in another PC to see if the same issue occurs. If it does, then it's probably the GPU. If it works fine elsewhere, your issue might still be power-related or involve the motherboard's VRM. Make sure you're using the correct PCIe cables and that nothing is loose. Honestly, I wouldn’t fully trust that the PSU diagnosis was correct because it seems like your power delivery is still off.

I have a POWERCOLO REAPER RX9070XT GPU, an MSI MPG A1000G 80+G ATX3 PSU, an ASUS TUF GAMING B650-E WIFI motherboard, an ARCTIC LIQ FREEZE III PRO 360 BK cooler, an AMD Ryzen 7 9800X3D CPU, and 32 GB of RAM. The PSU I have was a warranty replacement; it should be new, but I guess anything is possible!