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The Last Thing You See
Under the "Graphics" section for the Mac Pro on Apple's website.
Feast your eyes.
All-new high-performance graphics cards from ATI and NVIDIA make Mac Pro graphics technology even more cutting edge. The standard graphics card an ATI Radeon HD 2600 XT with 256MB of GDDR3 memory, PCI Express 2.0, and two dual-link DVI ports provides great performance for typical creative applications. And you get dual 30-inch Apple Cinema HD Display support out of the box.
For motion graphics, 3D modeling, rendering, or animation, youll need the greater graphics horsepower offered by the NVIDIA GeForce 8800 GT with 512MB of GDDR3 memory and latest-generation NVIDIA GPU technology.