> Intel ended up cancelling the Pentium 5 and instead going ahead with a much modernized Pentium III core for their Core release which made up the initial relea

> Intel ended up cancelling the Pentium 5 and instead going ahead with a much modernized Pentium III core for their Core release which made up the initial release of Intel Macs because AMD were eating their lunch. Intel based the Core on Pentium M, because Pentium 4 sucked. AMD happened to be competitive at that point of time, but that doesn't mean that without AMD, Intel would be blind to the fact that Pentium 4 didn't achieve Intel's own expectations - the NetBurst's ability to scale up frequency (they targeted 10 GHz) and keep wattage/heat in check simply did not work out.