Asus ROG Strix 2080 ti error

Playing Ancient Gods and my screen went black, GPU fans to 100.

System will post, but I have to use the MoBo DP for picture.

I've tried to download drivers, but the OS (Windows 10 64) doesn't find a compatible card, so I can't install them. Updated BIOS, card still doesn't appear. Mobo throws VGA error D6 (Asus ROG Strix Z490-E). Tried 2 PCIe slots.

No idea what to do. Card was OC'd but it was stable and never above 65C. Only twist here is the PC did post after the initial black screen. An Intel update said it had installed. Screen went black again and I never got GPU picture back.

Any advice?

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EDIT: A GPU rail came loose at the PSU end. I hang my head in shame. I know how this stuff happens, but I never thought it would happen to me.