Quote Originally Posted by Martin
I had some issues with performance on a system that was solved switching to refresh rate. The projector boys told me their input had to be 60Hz. Changed it to 75H and using 1024 x 768. This was on a Barco R18.M
Performance issues are something else.

There is a bug in opengl after about osx 10.3.5 which requires the installation of the ATI displays control panel and software.
otherwise 60hz doesnt work well, but 75 works fine.

Did you check this?