I'd say you're doing pretty good if you're only hitting the 70s with an air cooler. My 2080 Ti came with a water jacket from the factory, and it hits 60 pretty easily. The water cooled 1080 Ti that preceded it ran 15-20 degrees cooler.Replaced my Strix 1080ti with a Strix 2080ti over the weekend. Really liking it so far - seems to be a very well built card.
I do have 1 area of concern though, and that's with the temps. One of the things I really liked about my 1080ti Strix was the temps. That thing never got hot, and that's 1 of the reasons I stuck with Strix this time around. However, even at stock clocks, I'm pretty easily hitting 70C+ on this card. With a small core OC, I'll easily hit mid 70s while playing something like Shadow of the Tomb Raider. And this is with a pretty aggressive fan profile.
I guess I'm wondering, is it warm enough to look into exchanging the card? Or are these temps nothing to worry about and just a bit warmer than normal? Still trying to get a feel for where temps should sit with these cards.
Other than that, loving it so far. SotTR looks amazing with everything, including ray tracing, cranked up to the max.