12" PowerBook and another display
I am considering buying a new Apple display (waiting for the aluminum models to come out) to use as a second display with my PowerBook G4 (12-inch DVI, 1 GHz). But my PowerBook has a 32 MB video chip. Is that enough to power both the built in display and an external one (possibly 20-inch)? How decent of a performance will I get? Is the 32 MB video chip too underpowered to drive two displays effectively? Will using the PowerBook be noticeably slower due to it having to drive 2 displays?