thanks for analysis, how much watt Gigabyte RX 470 4 GB take while mining Ethereum?
I would prefer GTX 1070 but they are 3 times expensive and ROI period is longer in such volatile crypto market.
Even GTX 1080 which i am getting at better price MSI 8 GB GTX 1080 for $250 its still going to take more than 6 months for ROI.
I think you're missing one very important thing here. With AMD you're pretty much limited to ETH based coins, these cards suck on most other algorythms.