I am unable to apply clocks/volts or fan control to the cards if the onboard vga is enabled, and system doesn't boot if it isn't.
Hi, im exactly same problem with this MoBo and 6x RX 580, i dont try switch off integrated VGA so i didnt know what is problem with. I trying reinstall a lot of driver versions last days and nothing..
I using your 3th option and at this time i have hardclocked frequencies in BIOS. I dont like this solution because still dont show temperatures and i cant control FAN speed. I tried rewrite FAN settings in BIOS but dont working, GPU simple ignore it.
How did you solve it?
Thanks, Lukas.