If it can power this, I'm sure it can power 4 drives. But why do you think 4 drives needing 90 Watt?The Mac Pro 7,1 has a 10 pin socket that is used to power 2x sata drives. Does anyone know the power limit for this? I’d like to use it to power 4x drives with a custom cable of course. Hopefully it can handle ~90W?
Areca for exampleAnyone have a link to the type of PCI card needed to feed data to one of these arrays? most searches I've tried are just showing up M.2 cariers, or external eSATA cards.