Although what was said already is good and to the point, I'd like to add (for the original poster or others in his predisposition) that x86 CPUs after and including the PentiumPro (as far Intel, and K5 I think for AMD, if not then K6) are all RISC internally. They convert x86 assembly/machine code into micro-ops (operations) which execute on a RISC core. So they're not really that far removed from what PPC chips, as far as high-level architecture. Of course the devil's in the details...