Ubuntu 12.10: Open-Source Radeon vs. AMD Catalyst Performance
Phoronix: Ubuntu 12.10: Open-Source Radeon vs. AMD Catalyst Performance
With Ubuntu trying to improve their OpenGL driver support state to push the Linux OS as a platform for gaming, Valve going to be promoting the closed-source NVIDIA and AMD drivers on Linux, and various other challenges still turning up for those trying to use the different Linux OpenGL drivers, here are some new benchmarks comparing the open-source Radeon Gallium3D driver against the closed-source AMD Catalyst driver.
What is the fundamental reason for the difference?
Does anybody know what the fundamental reason for the speed difference is? The proprietary driver is at least 3X faster on all tests - that is not something that you can achieve only with incremental code tweaking.
There must be something fundamental that causes the difference. Clock programming, memory setup, etc?