Everyone is getting ahead of themselves. People think Intel and AMD measure TDP differently. The truth is they measure it using the same suite of benchmarks, but, because of differences in architectural design of the CPU's, Intel comes up a little better, because of larger and faster caches. AMD feels this is wrong doing towards them and, even if the big industry players like Intel, Sun, HP and IBM have settled on the suite of SPECpower benchmarks run by a committee of industry players hailing from all those firms (and even AMD), are always coming up with excuses... Now, that Nehalem and the current Opteron line have the same architectural design (at least if you look at a feature set checklist it seems the same, integrated memory controller, comparable L3 caches etc.) and the results are still better for Intel, AMD really has nothing else to complain about. As a result they "invented" this ACP measuring scheme that unfortunately no one else recognizes. For a good read I must refer you to INQ's "AMD talks ACP vs TDP again" article. If I may add, it's a rare thing on INQ to talk about anything that might put AMD (or ATI for that matter) on a less then perfect light.