Quad-Monitor AMD/NVIDIA Linux Gaming: What You Need To Know
Unigine Sanctuary is much less demanding than Unigine Heaven and here we also see a glimpse again at the AMD performance: the open-source driver is slow, but thanks to the Catalyst Linux driver being in a poor state for the new Hawaii GPUs, the Radeon HD 6950 open-source numbers actually look good in relation to the $400+ R9 290.
The NVIDIA GeForce GTX 770 and greater were able to handle Unigine Tropics on Linux at 3840 x 2160 at 60 FPS and above.
Unigine Valley 1.0 and Unigine Heaven 4.0 are still the most demanding Linux OpenGL benchmarks at the moment.