The ATI Radeon HD 2600 XT Graphics Upgrade Kit from Apple is a PCI Express video card that is compatible with Mac Pro systems that feature a PCI Express 2.0 interface. The card can be added to your Mac Pro to allow you to run multiple displays. This is a great option for Mac Pro owners who would like to increase the display output capabilities of their computer.
DVI Connections
The card features dual DVI connections that allow you to connect dual monitors. It features a single-link DVI port that supports displays up to 23" in size as well as a dual-link DVI port that supports displays up to 30" in size. Adding the card to a Mac Pro system allows you to drive up to 2 additional monitors.
PCI Express 2.0 Interface
The card installs in an available PCI Express 2.0 slot. It is compatible with Mac Pro computers with PCI Express 2.0 by Apple.