Intel probably irritated a lot of manufacturers by making some changes to the configurable TDP of its Ivy Bridge ultrabook processors because it wasn't able to provide large enough quantities of the CPUs. The changes are relatively small, but could potentially mean notebook makers will have to do a redesign of the cooling system.
Although good news in a way for Intel, it seems that the demand for its Ultrabook specific Ivy Bridge processors have been much higher than Intel initially anticipated and the company has as such had to make some changes to the configurable TDP of said processors. It appears that the company can't meet its earlier targets, at least not if it's going to be able to provide large enough quantities of the CPUs.
The changes aren't big and the nominal TDP remains at 17W and the same goes for the highest configurable TDP for these chips which stays at 25W. However, the lowest configurable TDP has been increased from 13W to 14W and the same goes for the low frequency mode. In addition the low power mode has increased from 11W to 12.5W.