Regarding power consumption, Radeon 5970 and 5870 both consume more power than our card does, the very reason we took this design approach.
Yeah, but what about when the power doubles from your pre-fab estimates, like every other chip you've built?
Due to double node jump, the max power should be 0.77W/GH (3.1W/GH divided by 4). Based on everything we know from any chip industry (FPGA, CPU, GPU, etc), that should be the ceiling in power-consumption.
Regards,
Nasser