@icbrkr:
Definately no offense taken, I just had milspec on my mind when I was replying ;=).
Those specs must be wrong as the CV64 has a max pixelclock of 80MHz at 16-bit. A 1280x1024 screenmode at 50Hz requires a pixelclock of around 100MHz. I think there is a setting that will allow you to go above those 80MHz at 16-bit, but that will make the card use more bandwidth for just refreshing the screen than meant and will thus inhibit access to the vram for both the graphics chip itself (blitting, line-drawing, etc) and the cpu. At a bit over max, it will just make the card slower, but at some point it will give display artefacts and I think it will be next to impossible to reach the pixelclocks required for the 56Hz at 1280x1024 which I assume is your monitors minimum refresh-rate.
8-bit isnt too bad though and with those older cards at high resolutions it is much faster.
/Patrik