or even Intel Wireless..
13-MacBook Pro/Intel graphics chip only: Apple has gone with graphics silicon built directly onto the Sandy Bridge processor for the 13-inch MacBook Pro, as CNET reported last year. Nvidia, and its chipset based on GeForce 320M graphics, is out. This likely presages changes to new MacBook AIr models expected later this year.
15- and 17-inch MacBook Pro/AMD graphics: AMD (formerly ATI) "discrete" graphics silicon is now offered in the larger, more powerful MBPs. As in previous MacBook Pros, the discrete graphics chip is only fired up when heavy lifting is needed. When power savings is paramount or high-end graphics processing is not necessary, the system defaults to Intel's graphics.
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