[Closed Beta] Display driver stopped responding in the Mines

Basically, the title. My game freezes, and after a good 30 seconds or so of the game being frozen, I can finally alt-tab out and I get a little popup in the bottom corner of the screen that says "Display Driver stopped responding and has recovered." The game's still frozen, though, and I have to close it and reopen.

DXDiag is here.

There are forums for beta issues. This is for the live game.