@MAD_AI Sorry to burst your bubble, but who told you they would be using "retail" CPUs?
Both Intel and AMD have 8 core CPUs and even 12 core ones (Xeon and Opteron), they have been available for the enterprise market (Servers) for at least 3-4 years, so by today's standards they are somewhat "affordable technology".
Correct me if im wrong but are the current gen Xbox's and PS3's CPU available for the "retail market"? I think not, those were custom developed as far as i know. I expect the same for next generation of consoles: custom developed CPUs/GPUs.
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