[NDVIA GTX1060]Mining rig restarts with 6 gpus but 5 works fine

Dear miners , i am having problem with booting my rig after installing 6. card to it , please help.

My setup is:
Asrock H81 btc pro (tried new mbo bios , no luck)
6x COLORFUL GeForce GTX 1060 3GB iGame U (https://videocardz.net/colorful-geforce-gtx-1060-3gb-igame-u/)
celeron + 4gb ram
risers are usb powered ver006c
newest NDVIA drivers

So if I plug any 6 cards in motherboard pc boots but i see 5 cards.

Is there any help guys?