The SP31 does 5.5TH/s at 3000W = 0.545454 W/GH.
If you look at the other thread the definitive hashrate may be lower. We have to wait and see...
Just searched for "SP31" but could not find any other thread mentioning anything about the SP31 possibly getting rated lower than 5.5 TH/s. So which thread/posting do you mean?EDIT: @RoadStress already answered that one, there is no thread about the SP31 possibly getting rated lower, all previous info was about the SP30 only.