Gigabyte is crafting a GeForce GTX 1070 for Mini ITX systems. The GeForce GTX 1070 Mini ITX OC (GV-N1070IXOC-8GD) features a custom, small PCB and has a cooler with three copper heatpipes and a single 90mm fan. The card has a length of 170mm, just 18mm more than the Radeon R9 Nano.
The card offers 5+1 phase power delivery (versus 4+1 for the reference model) and is factory overclocked to 1531MHz core and 1721MHz Boost. Furthermore, you can activate OC Mode via Gigabyte's software, this setting raises the OC to 1556/1746MHz.