For impressive graphics processing power, the ATI Radeon HD 5770 with 1GB of GDDR5 memory is a great choice for visual creative, scientific, and technical applications.
ATI Radeon HD 5770 includes three video ports: two Mini DisplayPorts and one dual-link DVI port. This allows you to connect the 24-inch Apple LED Cinema Display plus another Mini DisplayPort-based display, and a DVI-based display such as the 30-inch Apple Cinema HD Display. Display adapters are available to connect VGA displays.
1GB of GDDR5 memory
Two Mini DisplayPorts
One dual-link DVI port
Mac Pro (Mid 2010 with 1333MHz DDR3 memory) with PCI Express 2.0 slot; Mac OS X v10.6.4 or later