To provide you with a complete picture, we measured the power consumption of the systems (without a monitor) based on the tested CPUs. The CPUs worked in their nominal modes. The system configurations were the same as in the performance tests. We enabled Enhanced Intel SpeedStep and Cool’n’Quiet technologies. The CPUs were loaded with Prime95.
Quite logical that the new Core 2 Duo E7300 and Pentium DC E5200 processors based on 45nm cores showed better results than their predecessors from E4000 and E2000 families, not only in the performance tests but also in power consumption tests. We have already demonstrated multiple times in our previous articles that Wolfdale is much more power-efficient than any of the 65nm CPUs. The same is true for AMD CPUs, too: they can’t compete against Wolfdale in power efficiency. Only when Phenom transitions to 45nm process in early 2009 the situation here may change.
In conclusion I would like to add that after the launch of these two new processors the title of the most power efficient desktop solution goes to Pentium DC E5200. Of course, it can’t compete in power consumption against a nettop Atom 330 processor, however, it provides a completely different performance level, has no problems playing HD video in any resolution and works fine in most contemporary games.