How can a computer process use 399.6% of the CPU? Isn’t 100% the maximum?
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Most computers these days have multi-core CPUs. There are multiple processing cores all working independently on different tasks. While many processes may only be able to operate in a single CPU core, you can have multiple processes using different cores running simultaneously.
It’s important to be able to say that a process is pinning its own individual core because that indicates that it is CPU-limited. It’s more important to see chrome.exe using 100% of a CPU core rather than using 12.5% of a whole CPU.
As a result, you can get >100% CPU usage with modern CPUs.
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