I built Ethereum mining machine with 1080 TI graphic card and it worked. 3 month I made about $170. My electronic bill 3 month was much higher than this and it is so loud so I stopped it. Friend of mine built with 3080 Ti, 4 graphic cards, making about $1200 plus a month (last year). Back than 3080 was 2k per each, right now its $3600 per one 3080 graphic card its too expensive. I tried mine Ethereum with MSI gaming laptop too - It still mines Ethereum, but I don't recommends. My laptop went banana after 7 days.