"Another question to ask yourself, why did AMD increase the core voltage from 1.6V on the previous Spitfire based Duron to 1.75V for the Morgan based Duron? The feature set shouldn't require an increased core voltage... indeed the Palomino/Morgan was designed to reduce power consumption not increase it! The most likely answer therefore would be they raised it to ensure that all Morgan cores yield at clockspeeds of at least 1GHz so ther are no wasted processors that aren't good enough to be sold."
FULL STORY @ TWEAKMAX (http://www.tweakmax.com/html/morgan/morgan-1.cfm)