Well, 7.5A/core was ok for a 192-205MHz 122-round 2-stage-per-round pipeline design. Just my later designs needed more power.
So, are you alluding to SUCCESSFUL designs that went beyond 205 MHz and thus used more power, or to UNsuccessful designs that somehow wound up using more power?
If the former, that would be big news on this forum, considering the fact that right now I'm mining at a mere 208 MHz on a ZTEX board (with a shitty $2.79 fan cooler from China, though, not ZTEX's luxury cooler).