miner software optimization might get 3090 to 150mhs...hopefully 
No, Eth is memory bound, 3080 and 3090 have the same memory type and speed so the minor difference we will see would be due to 320 vs 384bit bus width. And this isnt on-die HBM, dont expect 90+ on anything.
1080 is 35mhs
1080ti is 50mhs
that's 42.8% difference between 1080 and 1080ti, both gddr5x
3080 is 100mhs (there is a post that says 115mhs at 300w) if you do the math of adding 42% of 3080 to 100mhs that's 142mhs.
now nvidia says 3090 as titan like(they phased out titan, this is the new titan), if 3080ti is not released yet, then 3090 is better than 3080ti
if 3090 is better than 3080ti, then 150mhs is not impossible.
XD you cannot add 42% and say "yes thats the hashrate" XD
And a screenshot say nothing. Wait i make a screenshot with 2000mh hashrate for the 3070, you believe this?
you will see, 3080 nothing more than 70mh.
In the past, much people say AMD RX5700 will reach 70 or 80 mh, but what is the fact?
LOL dude, 1080 and 1080ti are old hehehe ... screenshots are for the ones who didn't see the hashrate yet
LOL dude read my post again. I edited. I know that, and what will you say me with your sentense? You say there is screenshot with 115mh. Where? There is screenshot from a table. So i make screenshot from a table, where i write 2000mh per card, you believe this?
https://tekdeeps.com/in-china-miners-have-already-slammed-down-on-the-new-geforces/
https://twitter.com/RedPandaMining/status/1301935848493993984
there are already two sources pointing to ~100mhs
anyway for your sake here is a 1080 and 1080ti comparison
anyway my point is about 150mhs "possibility" from gddr5x to 6 to 6x. that's two vram generation leaps. understand the analogy. then you will understand why it is a "possibility"
unless you already bought a lot of 5700xt already hehehe