Does that only apply to when you add a new card off another PSU? Because I was able to get all 5 going on a single PSU plug and play, and adding the 5th on cast amd config.

Edit: just ran ddu in safe mode, reinstalled block chain drivers and the result is the same. Any cards attached to second PSU don't show up in windows. Tried a different SATA cable. I know they're getting power because the fans were spinning when reinstalling drivers.