Comment Re:Intel (Score 3, Interesting) 236
At the time, PowerPC chips were more powerful than x86 in terms of raw computing power. I believe that the G5 Mac was technically classified as a supercomputer based on an old standard of flops and could not be exported until the US government updated the definitions.
The reason for the switchover to x86 had to do more with power efficiency, customization, and logistics. While the PowerPC architecture did lend itself to better overall computing performance, it was lacking in power efficiency and heat. For a desktop that's not a major problem, but it is a problem for laptops. It's a problem that IBM never really solved as they never released a mobile G5 and Apple was stuck with mobile G4s until the Intel switchover. Here is one area where Intel was way ahead.
The two other related issues have to do with Apple's needs and IBM and Motorola's manufacturing logistics. Apple despite ordering millions of chips a year was always going to be a small customer in terms of volume. However Apple was going to need a heavily customized consumer PowerPC chip that required to be updated almost every year. Meanwhile most other PowerPC customers would want server/workstation chips that IBM used in their own products. Now these can be done but these factors cost time and money. I can see why Motorola and IBM (and also Apple) would be less likely to invest into new chips.
On the flipside, the Xbox 360's Xenon processor would be more the model of what IBM/Motorola wanted. Although it was heavily customized, the basic design has not changed in 8 years when the Xbox One was launched with estimated sales of 40+ million. This gave IBM enough time to do a die shrink to cut costs.
The change to Intel gave Apple many advantages. First of all, faster and more efficient mobile processors were available. Second, most of the features that Apple wanted were already in the x86 design as they were designed for consumer PCs. Third, any customization Apple requested from Intel, Intel could sell to competitors like Dell. For example, the first MacBook Airs used customized Intel Core processors in which the chip package had been shrunk 40%. Intel didn't mind investing the money for this customization as they sold them immediately to other customers. Many of the features that Intel got in the collaboration became part of the Ultrabook specification.