Although this shootout compares two entirely different platforms and literally compares apples and oranges, it represents what is available out there and shows how much energy each platform consumes. We picked five platforms for AMD's socket 939 and five others that support Intel's LGA socket 775 - and we did not do any performance testing this time.Check out the article at Tom's Hardware
Power consumption - AMD vs Intel

Tom's Hardware takes a look at the AMD Athlon 64 4000+ and the Intel Pentium 4 660 on different chipsets. But this time they don't compare the performance as they check out which system uses the fewest power.