High-performance computing: Muscle in the middle SAN FRANCISCO - It's easy to get the impression that the midrange Unix server is like a boxer near the end of a career - still packing a wallop, just no longer throwing knockout left hooks. But the truth is, new processor architectures, multi-core systems, and the ascension of x86 chips are giving these systems extra punch, and users plenty to think about as they plan their purchasing for the next few years. 

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