Although TDP does not equal power consumption, these figures support the point I was trying to make. The dual 2667v2 I briefly got my hands on mined at around 300W. I did not put much effort into optimization, but still... higher frequency SKUs are always less power efficient than lower frequency ones. In simple terms: a hypothetical 12-core CPU at 2GHz will draw less power than a 6-core CPU at 4GHz with the same architecture while both may put out the same computing power for an algorithm that scales linearly.
My view on power consumption may be skewed by the electricity costs in my country approaching 30ct per kWh. I understand that power consumption is less of an issue in other parts of the world with much lower electricity costs.