I'm using Linux and have an old P4 with about 3 GHz clock speed. Will a newer chip that had slower clock speed run my legacy applications faster or slower? I only use one application at a time, an old drawing program (windows app used in wine) that is unable to take advantage of multicore, and have no desire to run anything in the background.
For example - I was looking at used computer that was CORE 2 DUO 1.86GHZ. This is only half the clock speed, but a much newer chip. Will this run my single app faster or slower or about the same?
Answer
The clock speed is only partially in charge of 'how much stuff gets done' (a.k.a. 'work'). To compare 2 CPUs you should check out CPUbenchmark.net and find both your old and your new CPU and compare the results.
For example, a P4 with 3 GHz clock speed achieves a benchmark result of 491 (see here). the Core 2 Duo with 1.8 GHz clock speed achieves a result of 1115 (see here).
So, the Core 2 Duo is able to do more work in the same amount of time. With that in mind your drawing app should do calculations faster, and it will wait for your input much faster :) (it idles more since it finishes the tasks faster).
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