I just upgraded my early 2008 MacPro with the Apple ATI 5770 video card. This video card has one Dual-Link DVI port and 2 Mini Displayports.
But I have only one monitor, a Dell 30" connected via the dual link DVI and it seems to work fine at the native 2560x1600 resolution.
Is there any benefit to connection this monitor via Displayport at all?