Gigabyte z170x gaming 5 I7 6700k seasonic g650 sapphire r9 390 my computer is working good no proplems with it gaming editing everything is ok but sometimes when I restart or even when turn on my computer it shut down completely include LEDs etc for 2 to 3 seconds and then turn on again to desktop without any proplem ---computer does not turn off while gaming never only sometimes when I restart it or sometimes when I turn it on do I have a proplem in the motherboard or my board do that for a reason