Originally Posted by Phaedrus2129
Those TDPs look a little high-ish for the lower end models.
TDP seems more a specification/measurement that's labelled on processors to differentiate the choice of stock heatsink. It is not a total representation of actual power consumption but comes very close.
The 100W APU models use a taller version of the AMD stock aluminum heatsink than the 65W versions but that doesn't mean they consume that much power. Same goes for Intel on LGA1155. There is a tiny heatsink for the 35W models; then there is a slightly larger sized one for 73W/etc models. The 95W models (i5/i7) use an even slightly larger model. New Ivy Bridge LGA1155 models will see a global reduction in TDP ratings because new TDP ratings can be expected to more easily suit power consumption so heatsink size can be again reduced.
This is why you don't see processors that often have wide gaps in clock speed difference have same TDP. i.e. a 2.2Ghz dual core still sports 65W TDP as does the 3Ghz dual core.
The heatsinks that the processors come with define the maximum amount of heat and power consumption that can be outputted by this processor safely. Implementations such as Turbo Core are said to be designed to "not go over the TDP" (i.e. other cores shut down) - not necessarily due to power consumption limits but due to heatsink temperature limits.
You can see that only the multiplier-unlocked parts sport the 100W TDP. That doesn't mean they consume significantly more power. That does, however, mean that they get a slightly larger stock heatsink that offers bigger TDP flexibility (i.e. overclocking).
Edited by xd_1771 - 2/13/12 at 1:49pm