With the Mac Pro's structure dominated by the central heat sink, we'd best start by peeling parts off.

A clamp and four screws hold each of the dual AMD FirePro D300 graphics cards in place.

Amidst the usual processing power and cost comparison with a similar home-built desktop PC, these graphics cards may be the key to Apple finally undercutting homebrew systems on a pure power basis.

While this stacks up fairly well for current Apple GPU offerings, the proprietary nature, and lack of an elegant external GPU option, may age this device before its time.