Radeon 5000 series currently have a large lead on NVidia 2000 series when it comes to ETH mining effeciency/profitability. Assuming you will be able to get a hold of 6 3080's in the next 3 weeks at $700 each, they would have to do close to 100Mhz on ETH to be equivalent to the 5700XT's. I seriously doubt they will even approach that number.
Now granted, i totally get that Nvidia GPUs are better at mining other algos, but let's be honest... right now, all the money is in ETH mining. Maybe that ends next week (i sure hope not) but you can only go with what you have. Plus, losing 3 weeks of mining at these rates would be insanely crazy, especially since I already have it 90% bought.
Personally, I am much more eager to see what the Radeon Big Navi cards are going to be capable of. That's why I will likely be holding off on building my next rig until after they are released.
I'm thinking about the vrams....is 24gb a good investment vs 10gb? ...will there be a new coin or miner tweaks that will benefit 24gb, that is the question hehe
at least my main PC will be 3090, maxed out games gobbles up 11gb vram of 1080ti, 10gb vram sucks specially now that these new tech are "true 4k gaming", 3080 is a teaser, will disappoint a lot of gamers...why? o why? 10gb hu hu hu..
3070 is out of the question for me gddr6 vs gddr6x, 6x is the obvious winner. BTW info out there says 3070 is better than 2080ti
as history suggests bull market always breaks the previous highs, that above $1000 ETH...what will be the new high? 3k? 5k? or 10k? ..buy cards or save coins or both? hmmm.
these 100mhs or above hashrates will eat a huge chunk off ETH asic/fpga profits.
BTW if big navi dissapoints, you lost another month of profitable mining...that's the gamble LOL