NVIDIA GeForce GTX 1080 On Linux: OpenGL, OpenCL, Vulkan Performance
It was also about 15% faster for the Tesseract open-source game at 4K.
As another open-source Linux game test, Xonotic at 4K saw the GTX 1080 beat out the GTX TITAN X by about 13%.
With the synthetic benchmarks of GpuTest, there are some mighty gains for the GTX 1080.