After buying a used Dell Precision M4600 workstation, we encountered the following problem: very often, after loading Windows, the processor runs at a frequency limited to 800 MHz. CPU load does not rise above 30%. If, after booting, disconnect the power adapter from the outlet and plug it in 20-30 seconds, then the limit is removed and the processor can operate at a maximum frequency of up to 3.2 GHz. This behavior is similar to when we mistakenly connected the wrong power supply with a lower output current. But at the moment we are using a DA180PM111 power adapter with an output power of 180 W, which is what the workstation requires. There are no problems with battery operation. Can you please tell us how to fix this problem?
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