I don't know much about graphics cards, but I recently bought a 8800GT from XFX (Alpha Dog Extreme edition).
The first thing I noticed was how loud the fan was and there isn't an option to adjust the fan speed.
I've searched around and apparently all 8800GT's are running with fans on full blast, so you'll get a jet engine in your computer, like me.
I am concidering buying a new gpu fan, just because of the loudness of this thing. And also it doesn't cool down the card much.
At stress my card runs at 75-79 degrees celsius. With 49degrees on idle.
I allways afraided from a clowns. aww..