There's no such thing as must. =) All config guides shows that the ATI should go in slot 2 and it do fit there. Sure, you block one slot in the process.
But I would prefer to conf it as you say, Quadro in slot 2 so I guess I'll move 'em around today.
But I need clarification. Do you mean that resolve in the GUI only will display that there's one GFX card in the system but still use both?
Dwaine Maggart wrote:The ATI card, being a double wide card, must go into slot 1. The Q4000 can go in slot 2.
There is currently an issue with V9 on Mac displaying an ATI/AMD card as a GUI only card in the System Overview. If you have the GUI display connected to the ATI card, then everything is OK.