Z170 gaming 7 won't boot

[Uncleanbus]

Just put together my new rig
Gigabyte z170 gaming 7
Intel 6700k
Corsair vengeance RAM
CM hyper 212 evo CPU cooler
Asus gtx 970
Samsung 850 evo ssd

I can get my comp to boot. But only after I cycle power to the PSU.
If I just try and start after a normal shut down it constantly cycles my fans on/off.

[shadowsports]

Greetings,
What memory are you using?  Can you provide the kit and specs please? What speed are you running it at and are you using Auto, XMP or manual settings?  People are having many challenges with DDR4, z170 and memory timing at the moment.

Confirm all connections, reseat memory and add-on card(s).  Check CPU socket for bent pins.  I would suspect memory/BIOS settings if the systems runs normally after you remove/return power to the PSU between starts.