We finally free this most-dense of logic boards to get a closer look.

This miniaturized logic board is incredibly space efficient. The density of connectors and components is unprecedented. Ounce for ounce, even an Apple Watch has more bare board.

The compact iPhone X board manages to pack more tech and still make the iPhone 8 Plus board to its left look gangly and expansive.

Comparing the footprint of the two boards, the iPhone X motherboard is about 70% of the size of the iPhone 8 Plus board—that's a lot more floor space for battery.