Im building my wife a PC and now that my SLI is useless (for a few years now), I figured I'd give her my extra GPU.

I disabled the SLI in the control panel, powered down, popped the SLI and 2nd GPU out and gave my wifes pc the extra 1080. My PC started up fine, I booted up a game, and about 10 min in, the screen froze for about 10 seconds and then appeared to restart and now I have no video output. Did I brick my gpu? Any ideas on how to proceed?

I'm only panicking a lot.