Hanging off each end of the logic board, we find a small, modular USB-C board.
Now that our beloved MagSafe connector has been retired, a wayward step on the power cord is much more likely to damage your ports—so, it's heartening to see the USB-C hardware can be replaced separately (although you'll have to remove the logic board to get to it).
While both USB-C modules look identical to our eyes, Apple notes that only the left-side ports offer full-bandwidth Thunderbolt 3 performance.
With that, we can finally extract the fans. These highly-touted blowers measure 43 mm in diameter—a shade less than the 45 mm fan we found in the entry-level MacBook Pro (but hey, you get two of them).
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