Complex sentence: While Northwood ultimately achieved clock speeds 70% higher than Willamette, Prescott scaled only a measly 12% beyond Northwood, which was attributed to the very high power consumption and heat output of the processor.
Split into simpler sentences: While Northwood ultimately achieved clock speeds 70% higher than Willamette, Prescott scaled 12% beyond Northwood. Prescott's inability to achieve greater clock speeds was attributed to the very high power consumption and heat output of the processor.