I had a crash tonight while working on the timeline of Adobe Premiere CS6. I am on a MacPro 3.1 with a GTX 470 (from macvidcards) under 10.8.4 and its proper drivers. I was doing extensive scrubbing and I could hear the GTX's fan spinning loud. I thought these kernel crashes would dissapear with the latest nvidia drivers, in fact I haven't got a crash for over months until tonight where I was pushing the limit. Then I opened GPUtest and did a stress test which crashed the screen and locked the system after only 3 minutes of heavy load and fan noise. Flickering dots and rectangles and color hue change. Forced restart. I went on to purchase an Artic Cooling Acceleto Twin Turbo II graphics card cooler. I am reasoning that this is a heat issue. Has anyone experienced similar, I still suspect the drivers but after the EVGA Mac Edition I don't know if it is fair to say so for Nvidia. Finally, I had a forced shutdown so I don't know where to look for the panic log except for the console messages. Thanks.