D2R: MSI Afterburner/RivaTuner stop responding

Posted this as a bug report already. Sometimes I have the in-game display for RivaTuner on. After about 20-30 minutes of playing the D2R beta (also happened during open beta), the display will turn off by itself. At this point, I can’t turn it back on and my GPU fan speed starts climbing up, it looks like the fan curves aren’t being followed any more.