The theoretical max performance of a fully populated card is 128 GH/s. It's highly unlikely that we'll ever get close to that peak performance. Nevertheless, there's quite a bit of margin left above the 60 GH/s mark... some of which is being enjoyed in the Mini Rig configuration of the card.
WOW So maybe faster firmware,like the FPGA single,later on
I would hope it's just something as simple as adjusting the clock rate, like configuring a GPU.