GPU ethereum mining performance for 2018 (with watts)

GPU list with hashrate and power consumption

The next list provides hashrate and power usage for stock confgurations (without bios mod or overclocking).

Video CardHashrateWatts
GTX 1080TI 8gb32 MH/s200 watts
Radeon Rx Vega 56 8GB31 MH/s190 watts
GTX 1070Ti28MH/s200 watts
RX580 8gb25 MH/s175 watts
Rx 480 8GB 24 MH/s170 watts
GTX 1070 8Gb27 MH/s200 watts
RX570 4gb22 MH/s125 watts
rx470 4gb21 MH/s120watts
GTX 1060 6gb20 MH/s110 watts

With AMD cards the common practice is to mod the bios to improve hashrate, 480 culd go up to 29 MH/s (or more). GTX 1060 (6gb) could go up to 22MH/s. Also you can lower gpu voltage (for AMD) or lower the power limit (for Nvidia) to lower power usage and improve ROI.

Best GPU for mining in 2018