Screen stays Black

[marcjew]

I have got 6 Geforce GTX 1080 graphic cards and a Gigabyte Motherboard. When I plug in all 6 riser cables into the motherboard and boot it, my screen stays black. Then I have to pull all riser plugs except one, where my HDMI cable goes out and into the screen.
When the computer is booted up and working I want to connect my other graphiccards, so my Device manager sees them as well, but the computer never recognizes them.

what I already tried:

Boot up the computer and then plug all riser cables in and install a driver. but then I have to restart the computer and after rebooting the screen sometimes stays black sometimes in goes back to my home screen but just detectes 2 Graphic cards.

What can I do ?

 

[vexicus]

Change ur riser cables....there might be a short in the riser cables which is causing this problem

 

[ragnar-gd]

You might need more PSUs with more power. SIx 1080 put an immense strain on your MoBo, and on your PSU(s) as well.

 

[marcjew]

Change ur riser cables....there might be a short in the riser cables which is causing this problem

but why is the screen still staying black when I boot the pc ?

 

[vexicus]

Connect one card directly on ur mobo...nd check whether it works or shows black screen ....also what psu are u using?

 

[marcjew]

Connect one card directly on ur mobo...nd check whether it works or shows black screen ....also what psu are u using?

Superflower 1600 W.
You mean put the card with the HDMI cable directly in the motherboard and leave the rest in with risers ?

 

[marcjew]

Connect one card directly on ur mobo...nd check whether it works or shows black screen ....also what psu are u using?

Superflower 1600 W.
You mean put the card with the HDMI cable directly in the motherboard and leave the rest in with risers ?