Same trouble. 6*rx484, 13.6 each. On old BC drivers without strap 29.6 each
You have to reboot into "Test Mode" after running the start.bat file with administrative permissions. Also need to make sure you set the cards in compute mode. Add -y 1 to your config and it will do it automatically and then reboot. If not you can just hit Y and then reboot. It's key to reboot in between setting compute mode and running as administrator.