Off the top of my head (since I don't feel like looking up the numbers myself), Prescott ought to be around 90W at peak. You're telling me that Athlon 64 at its peak is less than 22W?
LOL!!! 90W at peak? I can see why you don't want to "look it up". You'd be staring at 115W "TDP" (Intel-style), and something close to 130-140W "peak".
Now, add to this that the 68W difference was for the whole systems.
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