Is AMD's New 2D Acceleration Architecture Still Slow?
Phoronix: Is AMD's New 2D Acceleration Architecture Still Slow?
Earlier this week AMD released the Catalyst 10.6 driver that on the Linux side of the table had finally made use by default of their new 2D acceleration architecture, offered official support for Red Hat Enterprise Linux 5.5, and formalized their OpenGL 3.3/4.0 support. Since the release of the Catalyst 10.6 Linux driver, we have been running a new set of tests on their new ATI 2D acceleration architecture, but the results are not what you may expect when compared to the open-source ATI Linux driver.
Please don't use QGears image scaling as benchmark
Please don't use "QGears - Image Scaling" for 2D benchmarks.
QT isn't able to leverage the XRender extension for image scaling, so the scaling isn't done on hardware at all.
This is the reason why the "old" Catalyst is faster in this test, because QT forces the driver out of its acceleration state, copying data back and forth between RAM and video-ram which is painful.