Also if it is continuous you really should only do 80% of the rating. This would be 1920 watts for 120v on a 20 amp circuit.
I would only run one 8 x 1080TI rig on this setup. I use 225-250w per 1080TI.
You really should run 240v with this kind of draw.
Below is my 125amp panel dedicated to mining. Yes, I did it all myself.
I undervolt them and runs roughly 180ish watt each.. so that's why I ran 3 psu instead of 2...
Problem of rewiring is that my electric panel is @ basement and I have to run some seriously wires to first floor laundry room (which I'm using it for mining)..it's a weird NYC townhouse set up I know.....
On top of this....I never ran electric wires before. I mean I'm pretty handy (I can build a honda engine with my eyes closed) but I don't want to be on the news

And hiring an electrician is going to cost heck lot more money.
sigh....maybe I should youtube and do it myself

Jeff-