I am using computer system and having ASUS GeForce GTS 250 graphics card with it. I have also installed RivaTuner functionality in the manage the working of this graphics card. But my problem is that I am not able to activate the auto fan feature with RivaTuner. I don't if there is something problem in RivaTuner or anything else. If you have any solution over this problem, then please let me know that.