Gigabyte managed to create what is most likely word's smallest GeForce GTX 1080 video card. Their new Mini ITX version is just 169mm long (versus 267mm for the reference card) and features a mild overclock. The model takes up two slots and features an aluminium heatsink with three direct-touch copper heatpipes and a single 90mm fan to provide some airflow.
The power circuitry received an upgrade to 5+2 phases (up from 5+1 on the reference model) and Gigabyte offers one-click superclocking. In the default Gaming Mode the card runs at the same settings as the reference model, meaning a 1607MHz base clockspeed and 1733MHz Boost. By enabling the OC Mode, the frequencies get a bump to 1632MHz base and 1771MHz Boost.
It should be available soon but the pricing is unknown.