I have 5 x Samsung 990 Pro and 1 Samsung 960 Pro.
Drives keep disconnecting at random or fail to show up on reboot.
I removed the 45W internal PSU and hooked up a 90W external powerbrick. Still the same issue on reboot.
Scrubbing the pool gave me 1.5A @20V max so 30 Watts.
The root issue seems the be an animic 3.3V power rail.