Even if you did the configuration just as crazydane showed the rig keeps rebooting. Either a bad RAM (rare case) but I would suggest to people to stop building mining rigs on motherboards which are not designed for mining. I wonder why you buy a Z270 chipset which costs quite some money when with the same money you can buy ASUS B250 MINING EXPERT a board dedicated to mining and I am sure it won't reboot.

Personally I have 2 MSI and 4 Gigabyte boards, both are having problems , they don't recognise more than 5 GPU-s with all Bios settings tweaked and they do have 6 PCIEX slots. With BIOSTAR TB250 PRO BTC which I build latest board it recognised 6 cards immediately and is running stable from a few days. Based on my personal experience I think miners should buy mining motherboards.