Danbuscus25 :
the only thing that would be "bottlenecked" whould be the monitor, cuz the max resolution if the 760 for vga is 2048x1536, and i doubt your monitor is that high res.
Just to be clear, the use of a VGA only display is not a bottleneck. It is simply using a lower resolution than the system is capable of supporting. Performance (as in FPS) should be very high on such a rig since the GPU will have to manipulate fewer pixels than with a higher resolution display.