Great choice of cards, I bought 20 of these, and they all came with Samsung Memory, so thats a good thing.

The only problem with them is they are 3 slot cards, so they are much bigger than others.
However, if you are able to find Sapphire RX580 Special Edition, then that would be a better option in my opinion.
My Special Edition cards are all 85%+ ASIC Quality, where the power color ranged from 70-85%