The Mac Pro uses three axial fans and a centrifugal fan to keep it cool, with blade design drawn from vehicle tires to make them sound pleasant even when loud (Alexander George/Popular Mechanics)

Alexander George / Popular Mechanics:
The Mac Pro uses three axial fans and a centrifugal fan to keep it cool, with blade design drawn from vehicle tires to make them sound pleasant even when loud  —  Spend a few tens of thousands on optional upgrades, and the new Mac Pro becomes a list of superlative performance specs.  A 28-core CPU.

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