Netburst was the Pentium 4 architecture that introduce large execution pipelines that permitted high clock speeds thinking they could out run inefficiency. Latency, power and temperature however became mitigating factors.

Alongside Netburst development, Intel had the Israeli team develop a mobile first platform. The team took parts of the bus for Netburst and shit canned the rest if the design in favor of the Pentium III which they optimized the shit out of. They introduced concepts like microop fusion and developed the processor with the goal of sleeping whenever possible to conserve power.

The net result was the Banias platform which was incredibly efficient because it was incredibly fast. The original Core line was basically Banias with power saving turned off.