eli5 – Why pc lag or slow down when severals apps are open but the cpu and memory are not used at 100%?

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I know that this might vary from case to case, depending on which PC and which app I have open, among other factors. However, I noticed that with all that I had open, regardless of the apps or games running, when the PC starts to slow down or lag, the CPU or memory is not used at 100%, but stays between 70% and 90% depending on the situation. What could be the reason?

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7 Answers

Anonymous 0 Comments

CPUs can’t run on 100% indefinitely because they generate heat. This is also why your computer’s fans start to go crazy when you are running a CPU-intensive process. The firmware may have decided that 70% is as high as the CPU can go right now, and so that’s what your computer is stuck at for the time being.

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