Update.

I re-built my setup from scratch. Re-installed windows on a new ssd .
Here is what works for me:

The Asrock mobo doesn't give me picture on my screen even when i clean installed everything and had my screen connected to a graphics card. Im using XFX RX580's.
In bios the default graphics is PCIE2 but if i have a card connected on it either directly or via riser it just gives me black screen and i cant even access bios.
So i used the onboard graphics to setup windows. Once i had windows i shut down and put ONE card on the main PCIE which is PCIE2.
Then at the first boot with ONE AMD card i installed the drivers Bakhtra kept mentioning 17.11.4.
Then i restart and switch the Global setting function to compute in the AMD settings. Shut down again.
After installing the first card i went ahead and connected 7 more cards. I did then ALL at once. Then i switched the setting for each card.
One thing i noticed with the 17.11.14 drives was that i could not get MSI afterburner to work. I could not change clock or mem Hz at all. Claymore gave me about 26Mh/s

So then i used DDU and after switching back to onboard graphics i installed the latest AMD blockchain drivers. This time after the restart all the cards were shown. One small detail. I have a card connected to the main PCIE but no card connected to the slot right before it. Havent tweaked anything in the bios either.
Windows now sees 8 cards and with the latest drivers i can use Afterburner and get some extra juice off of my cards.

Running Claymore at the moment at 29.9 - 30Mh's

Quick note: I had to up windows virtual memory cause claymore gave me a DAG error. After adding more virtual memory everything works as a charm!

Now waiting for the triple PSU cable to connect the other 2 cards remaining and have a 10x RX580's setup.

I ll try to help as much as i can if anyone else getting crap from that board..

Also it wont recognize Intel M.2 SSD's..