i Don't have a good knowledge in this field
but i read these articles
http://wccftech.com/amd-radeon-rx-580-570-560-550-specs-gaming-benchmarks-official-leak/
http://www.ttgadget.com/amd-rx-570-graphics-card-card-first-exposure-complete-specifications-leak/
https://videocardz.com/newz/xfx-radeon-rx-580570-pictured
and i don't understand any think so if any one have any idea please explain who is the best
but i read these articles
http://wccftech.com/amd-radeon-rx-580-570-560-550-specs-gaming-benchmarks-official-leak/
http://www.ttgadget.com/amd-rx-570-graphics-card-card-first-exposure-complete-specifications-leak/
https://videocardz.com/newz/xfx-radeon-rx-580570-pictured
and i don't understand any think so if any one have any idea please explain who is the best