As the speeds increase, you have continually smaller quantities of silicon that will run at the higher speeds, meaning if demand exceeds your supply of these parts, then you have to keep the prices higher to keep that demand in chack, and also because you may end up tossing out large parts of the wafers (This, also, is an issue when people purchase 1.4/1.5Ghz chips, and they have a glut of lower-r