well i've seen that i cant run a 1600 psu @ my electric plugs. do you think i can 6x 1080 with a 1200 psu?
If you're willing to lose a modest amount of production and run them at lower power use and you'll easily fit 6, even 6 1080 Ti. As an example, for ZEC and 1080 Ti, when set to a power limit of 160W I get ~80% of the production as compared to when it's set to 300W.