Power supply turns on without pressing the power button from the pc

coockylol

Prominent
Sep 1, 2017
1
0
510
I'm building an new pc. When I connect all the cables from the corsair rm 850x power supply to the motherboard (gigabyte z170x gaming) the power supply starts running. The power button isn't pressed and the pc is not running. Only the power supply is running en it looks like it also looses some power.
 

clutchc

Titan
Ambassador

Are you connecting cables with the PSU powered up?!