2016 End-of-Year Open-Source Radeon Benchmarks With Linux 4.9, Mesa 13.1-dev On Many Different GPUs
With the exception of the HD 4890 and V8750, all other AMD graphics cards were running the open-source cross-platform Tesseract game at above 60 FPS when at 1920 x 1080.
But of course it's a different story for Tesseract at 4K, but at least all of the GCN cards with RadeonSI were doing great.
The demanding Unigine Heaven 4.0 benchmark results. Fun to see this demanding OpenGL 3 tech demo still running on HD 4000/5000 series hardware with the data compared to Polaris and Fiji!
The same goes for Xonotic.