Re: GTX 460 Vesa Frambuffer @ 1920x1200
I guess it is manufacturer specific. But most manufacturers likely do not bother to change this from the default.
The GTX 460 should be able to do more, but vesafb is limited to the modes the video bios reports as supported. The manufacturers can (afaik) change the video bios which means they can change the announced vesa modes.