Hello, I just found this thread, myself having the exact same problem - Asus G750JM with NVidia 860GTX videocard and geting the same driver_power_state_failure BSOD, and apparently in the same circumstances - a little after exiting Star Wars the Old Republic if the laptop is left active or in the process of restarting / shutting down if such process is initiated. This type of error apparently only occurs with the video card being used, in normal windows operation i never encountered the error (norma computer use / restarting / shutting down). This makes a pretty strong argument for the Nvidia driver to blame. Since this thread is a few months old, have you found a solution to the problem?

Quick edit: the temperature is never above 60 degrees celsius for any system component (processor, gpu, etc).