The GTX 780 Ti does very well with Team Fortress 2.
The Xonotic results also show the GTX 780 Ti on Nouveau can work out well for open-source Linux gaming, just not as well as the proprietary driver.
The Nouveau developers have come a long way considering they don't receive much in the way of official support from NVIDIA Corp.
Well, for those curious about the re-clocked Nouveau performance in 2017, these are the latest numbers as of DRM-Next for Linux 4.12 and using Mesa 17.2-dev NVC0 Gallium3D.
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