Can you try the following, use OverdriveNTool and under volt your cards just a little bit, let say 900mV and report back. If you can mine with this then you might have an PSU issue
Here are the settings the cards are currently at.
https://i.imgur.com/iJ1rIDH.pngAll the cards are set here. I am not sure where to change 900mV as you suggested.
