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.
Hmm - would be good to see a Clock command in the firmware spec.
( Though last time I mentioned that quite a while ago, someone wasn't too happy about my wording ... )
I've just been playing with clock adjustments on the MMQ I got - was actually quite interesting in my opinion
Of course being able to adjust the Clock also requires some well defined specifications of the device limitations and performance and being able to accurately measure temperature
Though when devices hash 100x faster than they do now, it means dealing with the limitations properly is extremely important.
Anyway - we'll find out when the info comes out for each of the ASIC's what options there are with this sort of thing ...