Do you not have an iGPU? The fact that it happened during gameplay makes me think that you have to zero out your drive and erase it. Not delete your OS but boot into a live USB program to actively write zeros across your drive and re-install OS.
To be sure, you could take out drive and plug into a different system to put from it and see if it works. So far I don't suspect it's a GPU issue but rather a driver or OS issue that only requires erasing your drive.
Yes, wiping your drive would lose everything on there. Connect your drive to a different computer before wiping if you need to transfer files.