Opposite the headphone jack, we spy some super modular Thunderbolt ports!

This MacBook is off to a good start as far as we're concerned—all the ports sit on their own boards and are easily replaceable.

Finally we meet the part responsible for blowing the air in this ... Air.

The upgraded 7-watt processors must produce a bit of extra heat—Apple's prior Lightweight champs went completely fanless.

The fan's flex cable is likely home to a Texas Instruments fan controller.