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I would like to know whether there could be a driver I'm missing, since sysinfo can't see the correct value for my CPU frequency

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It's probably just because the processor frequency has dropped to save power due to it being idle. If you run a processor intensive task and look again you should hopefully see the correct frequency.

You can also see this information by running cat /proc/cpuinfo in a command line. For example, my computer has one core currently heavily loaded. Along with a load of other information I get this for the heavily loaded core:

model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz

cpu MHz : 3060.000

So that just about matches up with the 3.07GHz. For another core I get:

model name : Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz

cpu MHz : 1596.000

The current frequency is halved over the maximum.

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Ok I'll try loading sysinfo again when I'm running a cpu-intensive task. I'll come back then to tick your answer. – Felipe Almeida Jul 15 '11 at 14:40

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