quote: Low-power processors tend to use high Vt transistors for low leakage and tend to have lower transistor performance.
quote: ...they're not lowering power across the board. AMD is only offering 45W Brisbane for 1.9-2.3 GHz.
quote: In the past AMD hasn't modified their low TDP chips, they've simply picked the cream of the crop which are the ones capable of running at lower voltages. This is also why the lower TDP chips (EE chips in recent times, XP-M previously) are generally better overclockers than their higher TDP brothers.