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Left: 15" Unibody logic board

Right: 17" Unibody logic board

What's different? The biggest difference to you is the additional USB port. Oh, and $800.

The low-end 15" board that we took apart in October only has 256 MB video memory (Samsung RAM soldered onto the board). The high-end 15" and this 17" have 512 MB video RAM.

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