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The Catalyst driver continues to slaughter the open-source drivers
for all of the GPUs, regardless of being low-end or high-end GPUs. Even the very-slow
Radeon HD 6450 was more than four times faster with Catalyst. Another difference
worth noting between the open and closed-source drivers is that with the Mesa/Gallium3D
code there is only OpenGL 2.1/3.0 support where as the Catalyst blob provides