”The combined straining technologies inserted into the AMD-IBM processes reduce power consumption by 40 percent compared to hypothetical chips that don't include the technology. Chips that didn't include these technologies, though, would be difficult to sell because of the power they would consume.”
AMD has worked hard to leverage their CPUs in the market as power-efficient. On the desktop line they have done well, but the Pentium M is a tough cookie to compete with and Intel has a bit of a jump on them. As early as the second half of next year, AMD will be introducing 65nm based CPUs.