Stop talk a shit about 30,5-31 mh/s with rx 580!!! Yes, its possible to get 31 mh/s but how long?? Rig will shut down after 1 hour, 3 hour..in the best case rig will shut down after 24 h.
No, it doesn't. All of my RX 580 has does 31+ (Hynix and Elpidas). Some even do 32+ but aren't stable.