I had to underclock my stock over clocked videocard and the crashes stopped, I have a 280x - not sure why its doing it but something with the clock and the game was not co existing very well, in the tune tool I cranked up the power a tiny bit and brought the clock speed to 980 from 1020 and havent had an issue for a week on max settings - mine was crashing with no error just effectively minimizing and closing the game sporatically - hope this helps