An RX460 4GB OC will be arriving soon, I'm betting +20MH/s on this $150 card. We'll see...
LOL, expect closer to 11mh:
It has about 1/3rd of the horsepower of a RX 480 from a specs standpoint, with just 14 CUs (RX 480 is 32) and a narrow 128bit memory bus
that link says 2gb...
My HD7950 3GB is doing 20 MH/s ETH & 420 MH/s DCR so the RX460 4GB should do better if you want to break down the 7950's specs.