The 3090 line are the top hashers but not the cost to hash ratio of the 3000rtx series cards.
That belongs to the 3060ti hashing at 66mh/s at 125watts which is even better than the 5700xt cards were doing.
Those were the king of hashrate for a while until these ti cards came along.
Maybe the 3080ti will do 170mh/s mark you are saying to be worth it to mine with. As they were announced to be between the 3090 and the 3080 in performance but not costing as much for the 3090 at a price tag of $1499 MSRP.
https://www.techradar.com/reviews/nvidia-geforce-rtx-3090