If you install the nV System Tools...you can set a new rule to control the fan based on GPU temp. I did this and set the temp range as 30-70C. Since do, I have not seen my GPU temp exceed 64C. The fan spins to around 80% as soon as the GPU starts to heat up. I idle at 48-50C and load temp is 60-62C....except for the spike to 64C when the fan first spins up. I need to clean up my cabling a bit....then I should have better temps to report.