ATI Technologies Nexus GA User Manual page 22

VGA Monitors
If you have a VGA monitor connected to your Nexus GA card,
you use the VGA Monitors feature to select your particular
monitor from a list of standard monitors.
You cannot select the monitor resolution using the
VGA Monitors panel. You must use the standard Mac OS
NOTE
Monitors & Sounds control panel. For detailed instructions on
selecting your monitor, please refer to the ATI Guide, which can
be accessed through the ATI Displays control panel.
If the VGA icon is dimmed, your computer has detected an
Apple-type monitor connected to your card. You do not have to
NOTE
make a selection.
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