From the article: The reason for the GPU performance change appears to be this Git commit: http://anzwix.com/a/Linux%20Kernel/CpufreqOndemandChangeTheCalculat

From the article: The reason for the GPU performance change appears to be this Git commit: http://anzwix.com/a/Linux%20Kernel/CpufreqOndemandChangeTheCalculationOfTargetFrequ http://anzwix.com/a/Linux%20Kernel/CpufreqOndemandChangeTheC... Interesting that a non-Radeon specific change improves up to 90% the speed of the rendering of the open source driver..