Apple Ditches Nvidia, Goes ATI-only for Desktops

That's not to say that Apple has switched sides, as the company employs Nvidia chipsets and GPUs across the entire MacBook, starting with the GeForce 320M in the 13-inch MacBooks to the GeForce 330M discrete part in the MacBook Pros.
This could be a sign, however, that Apple and AMD are forming a stronger relationship. Earlier this year, rumors did the rounds that Apple may be considering using AMD CPUs in its upcoming computers. LINK