Originally Posted by THG
With its total system power consumption of 54 W idle and 79 W at maximum load, the Athlon 64 X2 3800+ Energy Efficient Small Form Factor CPU lives up to its efficiency claims. The same platform, however, also drew less than 100 W at maximum load using the standard Athlon 64 X2 3800+. When discussing total system power consumption, it's important to remember that it includes chipset, graphics, RAM and hard drive power, and even the 15-25% power typically wasted by the power supply during conversion.
Two things became overwhelmingly obvious during this test: AMD's power savings extend from enhanced versions to standard Athlon 64 X2 cores, and that platform efficiency (mostly chipset and graphics) is the key to keeping overall power consumption at manageable levels. High efficiency will allow smaller enclosures for portable PCs and low noise cooling in home theaters, without resorting to typically high-priced mobile components or low-performance down market processors.
Intel's release of Core 2 may have stolen AMD's performance-per-clock thunder, but AMD retains its advantage in performance-per-watt when including the platform.