Really annoying problem... Trying to set up my rig

Hello,
So I'm having a really weird issue whereas I can't get my computer to turn on when riser is connected. All I hear is a click and the PSU cuts the power. I ran two seperate 6 to 8 pins PCI-e cables from PSU, one powering the riser and the other powering the GPU. On the PSU I connected the cables onto 2 random available 6 pin slots, and the riser only used 6 pin so I didnt connect two of them (you can take seperate 2 pins), while the GPU is using all 8 pins. I have tried multiple different risers, cables and changed out that little board that goes into the mobo. I have 2x 1070's and I am trying to power a rx 570 on the riser on top of that. I tried unplugging those two gtx 1070's and using their power supply cables for the riser and the rx 570, and suddenly it works. I have no idea if it is the cables or what the hell the problem is, and it is driving me insane. I used all night trying to figure this out but I am no closer... If the cables are the fault why would they not work? Normal type 3, 6 to 8 pin...
https://i.gyazo.com/3daccb16ca66c8b726347709639e2b06.jpg
Here you can see how it looks. Appreciate the feedback!

Topic: Really annoying problem... Trying to set up my rig (Read 145 times)