The OpenGL Speed & Perf-Per-Watt From The Radeon HD 2000/3000 Series Through The R9 Fury
And onto some Xonotic results, one of the most popular open-source games that can run on all of the hardware used for this 2016 comparison.
It's too bad the R9 Fury with its current open-source limitation is running just faster than a HD 6770...
And the ultra image quality results.