Why is my PCI Express x16 only running at x8?

I have ran a few apps and they say PCI Express 16 running at x8

EVEREST Ultimate Edition

CPU Z

and the nvidia control pannel and all say the same.
 
Lots of jumpers joined together, it splits the x16 into 2 x8 lanes.

You are not running SLi but your mobo is in SLi mode


EDIT// looking at the pic there seems to be some kind of switch, put it in non-Sli mode and it should be fine
 
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