For your viewing pleasure this weekend are some more benchmarks I ran on the Linux 4.5 + Mesa 11.2-devel configuration on Ubuntu 15.10 with the Padoka PPA and my custom kernel spin.
First up are some more AMDGPU benchmark results at 4K with a Radeon HD 7950, R7 260X, R9 285, R290, and R7 370. The R9 Fury was left out this round since its performance is still messed up.
You can see these benchmark results over on the new OpenBenchmarking.org. If you want to see how your own Linux system's 4K graphics performance is, simply install the Phoronix Test Suite and run phoronix-test-suite benchmark 1601309-GA-AMDGPULIN16
From this same driver stack / system I also ran some pre-GCN graphics card benchmarks with the R600 Gallium3D driver. The tests there included the Radeon HD 5830, HD 6770, HD 6870. and HD 6950.
Go view all those Radeon HD 5000/6000 seires benchmark results at 1080p via this OpenBenchmarking.org result file. You can see how your own system compares by running phoronix-test-suite benchmark 1601301-GA-R600GALLI42.
Hope you enjoy the new OpenBenchmarking.org public beta and if you run into any issues with the new site, be sure to let me know!