I'm running multiple overclocked AntMiner S1s and I put two per 1000-watt 80PLUS Platinum PSU, clocking in at around 760-780 watts at the wall at 120 volts. So somewhere around 380 watts per unit overclocked.
power supply efficiency makes big difference ..
person on other thread posted screenshot of two ants not overclocked pulling 800 watts from an 80% efficient psu ..
i want to test two oc'ed ants on a 1000-watt corsair rms gold which is reported 92% efficient ..
otherwise i must buy another corsair 1200i platinum ..