Wrong! I have mined with nvidia cards. Same or better performance with much less wattage. People must not know what they are doing! Its like my friend and his friend said AMD cards are better at mining eth without actually trying for themselves. Don't just go buy a calculator, test the cards yourself. Nvidia cards are damn good at mining eth.
you cant read very well can ya im stating if you have a 290 it will earn the most money on eth, not that it is the most profitable card for eth. as for most profitable on any coin, it depends on what you buy the cards for. And most nvidia cards shouldnt be used on eth. 1080ti's and 1080's should be on zcash. titan, 1070, and 1060 sholuld be on eth but those cost way more then some alternitives. and a 480 is just as fast as a 1070 but cost way less. 470 cost less then a 1060 and a titan v isnt a very good value.