How do I know if my 780M is fried?

Hello guys,

I have a 2013 Alienware 17 R1 with a Geforce 780M. Worked great for 4 years, repasted it last year.

Two days ago I was playing FIFA and the game hanged, then got a system error message and restarted. I tried the game again and it hanged again after a few seconds with some minor graphic artifacts. At this point I also got the "video driver crashed and was restarted" message in the taskbar, so I thought I'd update the video drivers.

I tried a few, but it soon became clear that...

How do I know if my 780M is fried?

How do I know if my 780M is fried?