Inside the PlayStation 4: A balanced approach to building a game console
By the time Sony unveiled the PlayStation 4 at last night’s press conference, the rumor mill had already basically told us what the console would be made of inside the (as-yet-nonexistent) box: an x86 processor and GPU from AMD and lots of memory.
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Story added 22. February 2013, content source with full text you can find at link above.