It happens at the most random times, and when i say random, I mean RANDOM. Sometimes I can play for over 6 hours without trouble, sometimes it shows in less than a minute.
So this sounds like me a few months back. My issue turned out to be items plugged into the USB port!?!
* I would plug in my phone to charge and then "randomly" my computer would reset during the charging process. Took a long time to figure that one out.
* Then a different time : If I put my USB hub into the back of my PC with the other items it pulls down the power enough so the PC won't boot. (6 USB items) Plug it in after boot - no problems - totally repeatable. Solution was to use a different USB in the front.

Don't know if it's the same issue you are having but I'll put it out there for consideration.

I'll also point out that Direct X also controls your sound. The issue could be with the audio system and not the graphics card.