The first attempts to explain the high heat of Ivy Bridge processors overclocking was linked to the properties of thermal interface, which is applied between the crystal core and the heat spreader. Intel has not denied that the substance is different from the one used in Sandy Bridge processors. Further experiments , however, brought another explanation: due to a decrease in the core area heat flux increased, which causes a higher local heating. Recall that Ivy Bridge processors are available on a new 22nm technology, using three dimensional transistor.
Intel representatives recognizes that users may observe a higher temperature (during overclocking) due to the increased heat flux. This is not a defect, since in the normal modes Ivy Bridge processors fit into the expected reliability.
The energy level, described by the TDP value , has not increased in comparison with Sandy Bridge. In fact, we are talking only about the increase in temperature. Formal TDP value is equal to 77 watts, but on the box indicates the value 95 W, pertaining to the performance of CPU cooler.