Because the software, os, or some hardware using the cpu at that amount
If you want to lower the percentage you need to upgrade your chips, core, or close software or remove hardware that use the cpu
don't know why my CPU usage is totally consuming by program called SYSTEM IDLE PROCESS
off the computer
It is generally better to have a low CPU usage, as this indicates that your computer is not overly taxed and can better handle tasks efficiently. A high CPU usage can lead to slow performance, overheating, and reduced battery life.
Google Chrome generally uses high amount of CPU. It is generally due to the various processes it keeps running.
When the Mac overheats, kernel_task activates to throttle CPU usage and prevent the system from overheating further. This protective measure can result in the kernel_task process consuming a significant amount of CPU resources to reduce the overall load on the system.
YES Just look under the performance tab and you will see cpu usage.
10
Time of CPU usage per minute, Number of processes running at once
No, not unless the CPU also raises above the safe temperature threshold and stays there for an extended period of time. Assuming by 'high' you mean CPU usage % as reported in Task manager or similar.
Remember that there are two different requirements on a game, minimum and recommended. If you are running the minimum requirements and there is anything else running in the background then you can expect high CPU usage. If you are running the recommended requirements, or higher, and still having high CPU usage it is usually time to start the task manager, chose all processes from all users, then click on CPU. Usually the first process on the list is the System Idle Process, if there is a process that is using more CPU processing than that you need to find out what it is. As a tech since 1992 there is a truism that usually applies, rebooting fixes 99% of all issues. That being said, if you have rebooted and cannot find the process that is stealing your CPU power, it would be a good time to run both your anti-virus and a good malware program.
Probably 4.0 beta 7 because it has the least CPU usage. Chrome uses much less CPU usage though.
When you have two CPU's. You are shown one graph per processor (core) that your machine has. Ex, a quad core i.e. a machine with 4 processors will have four CPU usage history graphs.