For a full video walkthrough of the BIOS on the Z170X-Gaming G1 be sure to check out our video below.
Gigabyte has done away with their 3-mode BIOS. So no shortcut (easy mode) or TweakHD mode, you are left with the advanced UEFI BIOS. This BIOS has all of the options you would want, but I would have liked to see an easy mode screen where you can do simple things like set your XMP profile or boot device priority.
One cool thing you can do in the BIOS is adjust the turn the LEDs on the board on and off.