NVIDIA & ATI GTK Benchmarks
 

Since publishing our Avivo versus fglrx driver GtkPerf
benchmarks that compared the GTK performance between the community
open-source driver and ATI's official driver, we have received a number
of requests for more of these 2D benchmarks with different graphics
cards and different drivers. While this is not one of our formal
articles, we have completed a few more GtkPerf tests with NVIDIA and ATI
graphics cards to see how the GTK performance stacks up.

http://www.phoronix.com/vr.php?view=10658