These sites are looking only at the CPU itself which, logically, should run hotter under many circumstances due to the fact that it integrates so many components which werent on the CPU chip (calling it an SoC - System on a Chip would be much more accurate than calling it a regular processor) in previous generations e.g. Core 2 not the entire chipset, which actually *reduces* the space, power and heat produced by the system.
We did hear that a lot of work has gone into the new cooling system, which takes back all of the space saved by the new chipset and other components which are also smaller than their predecessors
.in fact, said cooling design is apparently more responsible for the delays in bringing this system to market than any other factor.
All that said; we cant say with absolute certainty that the machines we get sneak peeks at in the prototype stage will be brought to market essentially unchanged. Small differences are almost a certainty but something as big as rolling back to dual-core Nehalem only would be one heck of a big change.
As for power concerns
.yes, the high-end 2.93GHz quad-core Nehalem desktop chip draws more peak/avg power than all other versions 130 watts versus 90. However, its temperature levels arent necessarily quite as high as people seem to think. Several new technologies introduced in Nehalem, from disabling individual cores entirely when not in use to dynamically scaling each cores clock speeds independently, among *many* other things
..make it quite unlikely that the temperature of these new chips will remotely resemble older chips, even a single generation older, with similar power dissipation levels.
