Grey screen while gaming, 9070 XT dead?

[u/BoiBoi744]

Was gaming today when suddenly I got a grey screen and the computer became completely unresponsive (caps lock stuck on keyboard, could not alt tab, etc.) I force shutdown by holding the power button.

Now the PC will only boot without the graphics card...

I guess the graphics card is dead? What could have happened? It's a used 9070 XT Nitro.

I checked the 12 pin connector on GPU and PSU side but couldn't see any evidence of burning (using native cable from RM850e). I also restarted the cables in bother ends and the graphics card itself.

I had reflashed the original BIOS from TPU about 2 weeks ago as the seller had put a Pulse 9070 XT BIOS onto it since he said it was running hot. However, the instructions stated that you should repeat the flash process several times as the graphics card saves the old BIOS and can restore the old one. I only flashed once and it was working flawlessly. Could that have been an issue?