These are known Kepler cards:
GT 640
GTX 650/660/660 Ti/670/680
GTX 760/770/780/780 Ti
These cards are have experimental reclocking support in recent kernels.
Intel, definitely, until Nouveau gets reliable reclocking that can fully
exploit the graphics card. (It is starting to happen on Kepler series video
cards [most GeForce 600 and some GeForce 700s]).
No, but it is planned since years ago.
How is 60 FPS not good enough. I mean cinema is 24 FPS and looks good enough.
But does it really make a difference? I mean it is a biological issue: your
eyes are limited in the number of frames they can perceive per second.
Xonotic has software rendering using vid_soft 1, but it is very slow.
Such artifacts are known bugs on older Intel graphics adapters, there's not
much to do, but you can try updating the kernel.
