Everyone who recommended GTX 1060 6GB over the RX 580 8GB, where are you now? 
The RX 590 is faster than a GTX 1070
https://www.techpowerup.com/review/red-dead-redemption-2-benchmark-test-performance-analysis/4.html

The RX 590 is faster than a GTX 1070



https://www.techpowerup.com/review/red-dead-redemption-2-benchmark-test-performance-analysis/4.html