Are you hot plugging the controllers?
Ie turning on the psu plugged into the hash boards with the controller unplugged?
Then plug in a hot pcie cable into your controller?
Yup Yup
Yeah that is how you scorched the controller jack. You arc the d c power .
The instructions are written in a way that more then one person has done what you do.
Never never never never never do that.
1 Plug in all pcie jacks with psu turned off.
2. Turn your psu or psu's on.
3. Look at your hash rates if they look like shit do a soft re boot via the system reboot option.