RadeonSI Gallium3D Made Impressive Performance Gains In 2017
DiRT Rally is significantly faster with the latest driver updates on the newer AMD GPUs. While the HD 7950 goes up by just 14%, the RX 580 and R9 Fury are 43~44% faster.
The HD 7950 with Dota 2 on OpenGL went up by just a few frames, but the RX 580 and R9 Fury are around ~30% faster.
ET: Legacy is one of the few games where the performance has regressed with the newer driver code.