Not worth if if at all and here is why. For the same price as a 1080Ti you can straight up buy a years worth of coins mined. Of course don't buy BTC, pick a few alt coins and sit on them for a year. IF you were to mine, in a year you MIGHT break even if you sold all the coins.

I just sold all my cards and kept a single Titan Xp. Got double what I paid for them in May and still have all my coins so when the market recovers in a few years, I'll be ready to cash out.

GPU MINING IS DEAD! Just like in 2013 crash. Until the next coin takes off, the only people are mining would be the ones who are HODLing for years! otherwise you might very well lose money after selling coins every month.