Source : AMDOptimized exclusively for Apple Mac® Pro systems, the ATI Radeon HD 3870 Mac & PC edition can help drive productivity with built-in 256-bit 512MB GDDR4 frame buffer memory and 320 stream processors to deliver maximum performance for graphics-intensive applications such as 3D modeling, animation and games. Users also can expand visual workspace using twin dual-link DVI ports to connect two 30 Apple Cinema HD displays®.
With a manufacturers suggested retail price (MSRP) of USD $219, the ATI Radeon HD 3870 Mac & PC Edition is scheduled to be available late June at leading Mac retailers world-wide.One can be fairly certain this card will find the way on The Apple Store eventually, both standalone and BTO. More detail of the card can be found