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Subject: Re: Issues with GTX960 on CentOS7 using bhyve PCI passthru (FreeBSD
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> When `glxgears` is run in fullscreen mode, what's on screen depends
> on each run. Framerate varies from run to run, is mostly stable within
> one run but can change abruptly by 100's of FPS. When the screen is
> blank, the framerate is slowest (750~1500 FPS). When only parts of
> gears are rendered, framerate is usually higher, up to 2500 FPS.
> Rotation is smooth, but with brightness flicker of some parts of
> gears sometimes.

I should mention these numbers are for 1600x1200 screen.
Also, with VNC session closed (but vino still running),
the frame rate goes up to far more reasonable 6400 FPS.

-- 
[SorAlx]  ridin' VN2000 Classic LT