AMDGPU vs. Radeon Kernel Driver Performance On Linux 5.0 For AMD GCN 1.0/1.1 GPUs
With BioShock Infinite at 1080p with ultra quality settings, using the AMDGPU driver led to slightly higher results. Again, for the R9 290 are just reference figures on AMDGPU since under the Radeon driver it wasn't able to drive any display.
But when pushing BioShock Infinite harder by ultra quality settings at 1440p, the Radeon vs. AMDGPU performance on the R9 270X and HD 7950 was closer to being the same. Though it is worth pointing out the minimum frame-rates were higher with AMDGPU.
With the demanding Deus Ex: Mankind Divided OpenGL game, it's worth noting that while the average FPS was similar between drivers, the minimum frame-rates were higher when using AMDGPU.