Summary: This is an excellent upgrade from my 9600 GSO and is the first graphics card that I've purchased that came with an adequate heat sink and fans already installed. It idles around 90°F and I've never seen it go above 160°F under full load.
Summary: I bought this card to replace an ATI Radeon HD 3870 because it was extremely noisy. I am happy to report that even running at full tilt, the card is very quiet. The fan noise is barely audible, and would not be audible at all while playing a game or movie.