Windows 10: 10-20% CPU usage that doesn't show up in task manager

Recently I have upgraded my cpu from a 4590s to a 4790k and whenever I begin to run a task such as a game there is always a mystery 10%-20% cpu usage. Nothing will show up in task manager about what is using up so much cpu. I have searched for people who also have this issue but couldn't find anything. I've even reinstalled windows twice but nothing has helped. Any fixes?

:)

 

high cpu usage when task manager is open

i am having issues with cpu usage when i bring up the task manger it shows that cpu usage is 59% with the task manager app using up 30-40% cpu usage in the performance tab it show that my cpu usage is at 80% usage but when using other programs to check
my temps and cpu load etc is shows low 20s when gaming this can pin the cpu up at 100% in task manger

 

Task Manager showing 100% CPU usage

Task Manager showing 100% CPU usage. A few days after I built my PC, all of a sudden task manager started showing 100% CPU usage no matter what programs are running and it was also showing very high power usage. I ended up temporarily fixing the issue after I did a full fresh install of Windows, 2 months later and now the 100% CPU issue has returned. I checked sensor connections and updated my bios with no luck. I have NO performance issues, I used the Intel Extreme Tuning Utility and it showed no high CPU usage. CPU and motherboard specs are below:

Windows 10 Home 64-bit

Motherboard: Z690 UD DDR4

BIOS: F7a

Processor: 12th Gen Intel(R) Core(TM) i9-12900K (24 CPUs), ~3.2GHz

Has anyone else run into this issue? Does anyone know of possible solutions?

 

Task Manager High CPU Usage

I have the same problem myself with it only happens when I scroll through task manager and open and close it. I don't know this for sure but the reason this probably happens is that you may have a lot of processes running and task manager is using a lot
of the CPU to process the usage of each program.

What I have done is disable data that I don't need to see like network usage and GPU usage and it drops the CPU usage a bit. I have also enabled everything and scrolled up and down on it and task manager uses almost twice as much.

I would suggest disabling everything but CPU, disk, and RAM, (I would not suggest having GPU on because it is almost always at 99% unless you have FPS limits).