> I've noticed similar on some machines without adequate cooling. > > Modern CPUs ramp up and down the clock quite frequently, but from what I can see, > seem less likely to ramp things up if the CPU is already past a certain temperature > threshold.
That may well be the issue. But, there is also a setting in the Control Panel called Power Options. If you haven't configured that, the default, (I think) is Balanced. That will throttle your CPU down as well. You can set it to Performance or change the CPU throttling manually in the advanced settings. I've seen this misconfigured many times on Database Servers and all the IT people always seem baffled when I tell them to change it.. but, it has a pretty dramatic affect on performance.
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