Someone explain why Haswell would be better than Pentium?
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Solved by KaareKanin,
In general, when one CPU performs better than another CPU even though they have the same clockspeeds, number of cores or cache (or whatever other spec you might be comparing, it comes down to architecture, the way the electric workings of the chip itself is laid out. Newer CPUs are generally able to do more for each clock cycle than older ones, this is often referred to as IPC, instructions per clock.
So if you're wondering why an old CPU performs worse singlethreaded than a new CPU even though they run at the same clock speeds, there's your answer.
But there are other reasons why newer is better. Generally: more cores, lower power consumption, more features, integrated graphics.
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