^^^ I'm not sure what you guys are smoking but my rx480/580s went from 995 to 1015 xmr. Fix your -h values, 896 for 4gb cards, double that for 8gb.
One dude was spamming screen shots of his asus 480 doing over 2k xmr!!!!!!
Proofs? Have Rig with XFX GTR RX580 8GB Hynix memory (core 1300, memory 2210, 940/900), any actions with a parameter -h do not give any effect, most likely, just garbage written.
He was mining the new cryptonight-lite, psyched me out.