Benchmarks Of The Open-Source Intel/AMD/NVIDIA Drivers, 11 Years On
SuperTuxKart 0.9 failed to run with the Nouveau NVC0 Gallium3D driver. The Radeon HD 6570 also was unable to handle this recently-updated open-source game. With the higher-end R600g and RadeonSI hardware, the game was easily playable at 1080p but that wasn't the case for Intel Haswell HD Graphics.
The NVIDIA results remain obviously out of whack due to the re-clocking situation. As a reminder, the GeForce GTX 650 could reach its highest performance state while the other tested GPUs were generally running around their low-to-mid performance state. There also isn't working re-clocking for the Maxwell GTX 750 series.
Xonotic with high image quality settings yields playable frame-rates for all of the tested hardware on Mesa 10.7.