The RX 470 has been released and the web have appeared already the first benchmarks with regard to its capabilities in the crypto-mining.Theese are the results that have been obtained
Ethereum: 24 Mh
X11: 7.6 Mh
X13: 6.9 Mh
Keccak: 261 Mh
X15: 5.9 Mh
Nist5: 18.5 Mh
Qubits: 12.5 Mh
Quark: 2.7 Mh
Lyra2rev2: 5.2 Mh
Blake256r8: 2926Mh
Blake256r8vnl: 2894Mh
Decred: 1049Mh
There are still problems with some algorithms but I think it will be resolved in the next few driver updates
Source: cryptomining-blog.com