AMD Radeon GPUs Run Great With Linux 3.11 Kernel, Mesa 9.3-devel
The raw OpenGL performance results are in line with expectations relative to the various AMD Radeon GPUs. If you're curious about the DPM vs. non-DPM OpenGL performance, there are the earlier Phoronix articles looking at those numbers with this article just looking at the DPM-enabled Radeon GPU performance results in the best-case configuration.