Multiple cores is becoming a trend in next-generation processors, especially in the server space. It's also something all three of these chips have in common. The POWER5 is a second-generation dual-core processor, and IBM has now taken things a step further with the addition of 2-way SMT to each core. Sun's UltraSPARC IV is a transition of the current UltraSPARC III to a dual-core implementation that seeks to double the capacity of the company's current line of servers by maintaining compatibility with current single-core chips.
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