Originally Posted by Feuerfalke

The difference in OpenGL-rendering is minimal between nVidia and ATI, if there is any left at all with the new generation.

And the cooler, well, the ATI consumes less power and produces less heat. So it can live with the cooler it has, whereas the G280 for example got a lot of remarks during tests, that the cooler is running at max and still barely able to keep it within temperature-tolerances.