200%? You mean 800% don't you? We all see it ... Those Voltas are going to be bought up by China and you'll have to pay 300USD in fees every month to China just to mine. It's getting crazy out there.
It would be better to mine coal right now.
Honestly though ... Nothing that NVIDIA will ever put out will be as good as AMD. NVIDIA is more for the gamer, not the miner.
Well my math works like this, right now eth is $820, so 200% means $820 + $820 + $820 = $2460.
About nvidia, the titan v 12nm is volta and cost $3000 and is available right now and it can mine eth at 82 mhs, which means, expect lower versions to get speeds like 50 to 70 mhs.
I guess nvidia changed something concerning mining, nvidia wants to be competitive x amd about mining, reason why the titan v 12nm is doing 82 mhs.
How different are the voltas going to be from the vegas? Last time I checked the vegas were a bust but maybe some people have modified the drivers to get better results?
To the OP i must agree with the others its better to just buy and hold at the moment, in my opinion its subsequent to change though. It just seems like there is so much money coming into crypto that investing in a rig doesnt make sense.
I would only do it if you are interested in the process and the building of it. But chances are you will make quicker roi by just buying and holding.
I will say that I build a rig with 6 1070s in July, its almost paid off at this point. Good luck