Actually, RX 570 gives 1k+ with the right straps
Its not that hard to write your own straps these days.
There are lots of different memory types from all memory vendors, learning to write custom straps tailored to your own cards really does wonders to your profit.
Penny, could then please share a guide with me on how exactly to make my straps for Cryptonight/ Heavy algo? I would really like to drop out of the ETH mining, because I do not find it as profitable as the cryptonight coins, plus not to mention that my cards are quite cooler and working quite easier on the cryptnight algo