I have an Asrock z87 Extreme 9/ac. I can get 4 cards running properly without risers.
I f I use any number of risers, powered or not -- Windows 7 will either not boot all the way to desktop, or it will boot but one or more of the cards will have a code 43 error.
I've ordered new riser cables, just to see if the one I bought were crap...but can anyone think of something that can help make this setup work with cables?
note:when I say it "won't boot", I think it actually is booting -- but I can't see video. I suspect this because on the next reboot I'll get the "windows did not load properly" message.
Why do u use x16 risers, using x1 to x16 has showed most compatibile so far to me.
Borrow some of those risers and then try giving it a go, i have many boards with 5x gpus and 4x gpus, all on x1 riser.
Dont have your board tho, but i wouldnt consider pin shorting as it may have some consequences.
cheers