Not sure what your case looks like. But I added an external fan to the back of my main rig, SilverSkye, blowing air in. This lowered my core temp by 7C. My machine runs a CPU fan, a Power fan, a Nvidia fan (which I am, also!), and a side-mounted case fan blowing out. So, in the rear, if you have venting of any sort right above your AGP card, put a fan there. Blow some air across both your AGP card, your CPU, and your RAM. Works pretty good, and I'm glad you brought this all up! SilverSkye runs MUCH more stable now, even Morrowind won't crash...!