They are interlinked though. Most of the power consumed is lost as heat in electrical circuits and only a fraction is converted into work.
Look at the PCBs and cooling on the cards - its GTX680/GTX770 level.
Like I said either the GTX680/GTX770 is overrated or the GTX970/GTX980 are underrated.
My GTX660 is clearly not in the same TDP class as a GTX970.
My point was at Shankly and explaining how the TDP from each card was why the 970 was cooler.
http://en.wikipedia.org/wiki/Thermal_design_power
Worth reading that for those that are interested and not as tired as me.

