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Try following the troubleshooting below:
If the NVIDIA card is not detected, try pressing Fn+F7 to enable it again and restart.
Then, confirm it's being detected on Windows and BIOS. Check also if the AC adapter type says 'Unknown" on the BIOS.
If the GPU is still not detected, or shows Standard VGA Adapter on the Device Manager, try re-installing the video driver as explained on this article.
Check for any BSOD from when the computer crashed.
Let me know the results!
Alienware-Naomi Dell | Alienware Technical Support #IWork4Dell Opening your case does not void your warranty! Check out Alienware Artificial Intelligence I can't always reply to PM's, if you need extra assistance visit: