Hey. Thought I would OC my card just to see what the cooler (Arctic Cooling Xtreme Plus) could do. I did not change any voltages, just the clocks and ran a quick 10 minute furmark (will run an hour later). I do not have much experience clocking graphics or CPU for that matter. They are set at 930 / 1860 / 2300 at the moment. I tried 950 / x / 2400 but this caused an nvlddmkm.sys stopped working popup. A couple of questions: 1. Is furmark not suitable to stress the 500 series? What should i use instead? 2. Where do i go from here?