My setup is :
Started building my first mining rig. I have read both this forum and reddit as well as random info all over the internet.

Decided to go with the 13 gpu Asrock mobo and because of availability issues i got 3x psu's instead of 2x more powerfull.
Anyways building and connecting everything wasn't that hard. You need to follow the basic instructions that come with the mobo. I also watched this guy's video on youtube when assembling my rig : https://www.youtube.com/watch?v=B6gB7GYkkiA

Points to watch out for. You have to connect the 2x extra molex connectors on the mobo, to the same PSU that gives power to the mobo+cpu.

Other than that everything else as in the video but here's where MY problem starts

Setup is:

Asrock H110 Pro btc+
8g Ram (2x 4g dimms)
Pentium 4560
10x XFX R580's
3x 850w PSU (platinum)

For now i have only connected 7 cards using 2 psu's. Im waiting for a cable to connect all 10 cards and the 3rd psu.

I setup windows and installed the wrong drivers first. So had to use DDU and reinstall the AMD crimson pack. Now gpu-z and windows device manager sees 6 cards.
I did a bios update but that didnt change anything.
Also when i have my display connected to one of the 580's i CANNOT access bios setting.
If i disconnect all cards and use onboard graphics i can access bios but i get oenly 7 pciE showing in bios.

what gives?

btw using 6x cards with modded bios and AMD mining drivers gives me 30Mh/s on claymore mining Ethereum but i have 10x cards and i need to use them all.

thanks for any help..much appreciated!