Well Wolfenstein the new order did not even have proper sli support , so I would not bet on the new game having it or at least a good implementation of it, not very many new games do nowadays. The ID tech engine wolfenstein uses has trouble with sli from my understanding. However you can likely max it out or come close with a single 1080 at 1920x1080 60fps, but no system requirements have been posted for that game yet so I am not sure.