Using high-quality aftermarket fans from brands like Noctua or Noiseblocker, the result is both cooler and quieter than the stock heatsink. Using Noctua's NF-A6 fans, the card will not go above 70 °C while the fans spin at an inaudible 1800 RPM.
The heatsink also comes with much better thermal pads for the memory, keeping it up to 20 °C cooler than the stock heatsink.