RX 470 8 gb price is 220 eur
and hashrate is up from GTX 1080
and hashrate is up from GTX 1080
first of all you should be able to get some RX 470 8 gb which are on stock and sold at this price and what will you do with that cards in few weeks when they lose 30% hash power on ETH? going to one of the few alt-currencies (where for sure none of the other AMD miners will go to shred the profit there)?
Even if the epoch benchmark issue with the Claymore miner is not fixed or ETH goes to POS by that time, two RX 4XX/5XX card will easily do 620 H/s on ZEC or ~30% better than a 1070, or ~10% better than a 1080. Results for most other algoriths is similar. The bottom line is I can mine more coins for the same amount spent on cards with the RX 4XX/5XX than any Nvidia 10 series cards.