First, Northwood was surprisingly better than Willamette, but it couldn't clock much higher at first. It launched at a low volume 2.2GHz
I thought Northwood did well from the beginning. Willamette did reach 2 GHz, but at low volume. Northwood could deliver sufficient volume at any bin Intel needed. The performance jump over Willamette was also very good. AMD K7 never managed to successfully compete with it.
What I don't get is why Intel did not shrink Northwood to 90nm before doing something as complicated as Prescott.
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