While the 65nm processors from AMD should soon be hitting the streets for everyone to buy, Anandtech got a set of them a bit early and put them to the test to see if power/performance was improved. 
Overall we’re left with mixed feelings after playing with AMD’s first 65nm chips. Power consumption is definitely reduced compared to its 90nm offerings; in our tests we saw an average reduction in total system power consumption of 14.6W thanks to the new Brisbane core. Along with the lower power draw comes lower temperatures, which is also good. For no additional cost, and given that it should help alleviate AMD’s capacity constraints thanks to a smaller die, there’s nothing to complain about on that front.