^ Yeah, that's the same thing I got as I turned up the volts. Does your D601 diagnostic LED ever turn on when stuff crashes? I got it to turn on from time to time, indicated "critical core power failure". Only happens if you set voltages higher than 1.35V-1.37V on idle. It was very strange behavior indeed. I noticed that at this point VRM temps are also extremely high. Either way, it will not really matter what your clocks are in this case. The card will crash no matter what. If you lower the volts you will be fine. It must be that some OCP or OVP thing is kicking in...