...and power consumption is not the same on all algos.
yep, on 750Ti. for me it starts from 38 - 43 watt based on algo.
on 280x as well: depends on ram usage and how well the kernel is optimised (and probably other factors).
it can easily swing from 150W to 200/220W.
Yes and he didn't have a true read out ....... all hand written.