So, here's the situation: my MSI MPG A1000G PCIE5 PSU died suddenly while my PC was on overnight. When I came in, the power button didn't respond and the PC wouldn't power on. I figured out it was the PSU and replaced it with a new one today, using all the cables that came with it. However, after setting everything up with my RTX 5080, the card isn't being detected at all. The fans and lights on the GPU work, but there's no display and it doesn't show up in the BIOS—the PCIe x16 slot is marked as N/A. I tried a different GPU (GTX 1060) in the same slots and it works fine. I can't see any damage on the 5080, but I'm worried that the failing PSU damaged it. I really hope it's okay since it was a graduation gift and I'm still paying it off. What can I do in this situation?
5 Answers
There’s a chance that the GPU caused the PSU to fail. Make sure you're using the right power connectors—are you using the native 12VHPWR cable or any adapters?
Honestly, it sounds like the issue with the PSU and your GPU are linked. Since you've ruled out the PCIe slot, testing that GPU in a known good PC might be your best bet.
It sounds like your GPU may have failed first, potentially taking the PSU with it. If the PSU died first, why wasn’t anything else affected? Either way, make sure to use your warranty—file a return for both the GPU and the PSU with their respective manufacturers.
Did you use the native 12v-2x6 cable for the GPU? The lights and fans working indicates power delivery, but if the card isn't detected at all, you may need another system to test it.
Have you tried testing your RTX 5080 in a different PC? That could help figure out if the issue is with the card or your setup.
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