Windows 10: Why does task manager show CPU speed as 28873422.59 GHz and usage stays at 100%

This is a screen shot of Task manager. Resmon also shows all cores at 100%



:)

 

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 Incorrect CPU Usage

So for roughly the past couple of weeks, I have been having issues with task manager giving me incorrect readings on the CPU usage. Before noticing this issue, I have been running my 9900K at 4.8 GHz all core with an AVX offset of 1. Initially, reducing
my clock speed by 100 MHz down to 4.7 GHz all core (AVX offset 0) solved the problem for a couple of weeks, but the problem has now resurfaced despite the CPU literally running at specified stock speeds.

The Task Manager program is incorrectly reporting CPU usage spiking up to 100% at times, sometimes accompanied by the display turning into a black screen for a half-second while playing SCP: Secret Laboratory. Meanwhile, other programs that were running
at the time such as Google Chrome or DIscord turn into black windows and require restarting. Other programs such as HWiNFO64, Corsair iCUE, and Process Explorer are reporting much lower CPU usage percentages.

Any ideas on what is causing Task Manager to behave like this? I thought Windows shipped out an update that fixed the broken Task Manager, but apparently not for me. I have already tried a clean installation of Windows 10 Pro to no avail.

CPU: i9-9900K @ 4.7 GHz all core

RAM: 4x8 GB @ 3200 MHz, XMP I

Motherboard: Asus ROG Maximus XI Formula, BIOS - American Megatrends Inc. 0905, 4/10/2019

Windows 10.0.17763 Pro Version 1809

OS Build 17763.437

Full Desktop Parts List: System Builder





This was taken while running a game (SCP: Secret Laboratory, SCPSL.exe). Something seems off with the process explorer too since the game should be the highest in CPU usage, and the CPU use of the processes don't add up to 100%. I have seen this occur when
the computer freezes for a half-second for no apparent reason.





This was also taken while running the same game mentioned above, except this time only the Task Manager is reporting an incorrect CPU usage while Process Explorer says otherwise.





This image shows Task Manager claiming that the CPU frequency is being throttled to 3.6 GHz. CPU-Z is reporting a clock speed of about 4.7 GHz. Task Manager also seems to think CPUs #8 and #9 (starting from #0) are going crazy. I've checked both CPUs in
HWiNFO64 and Process Explorer and found nothing wrong with them.





This image is another example of incorrect CPU usage where the actual CPU usage is much less than 50%.

 

Task manager showing 100% CPU usage at idle.

Task manager is showing 100% CPU usage at idle. If you look into the details to see what if anything is really using that much processing power and it shows "system idle process" at 99-100% when at idle. This is normal I know but task manager should not
be including "system idle process" when its calculating CPU usage. This is causing my CPU to ramp up and my fans to stay at full speed at ALL times.

Things I've tried:

*Re installing windows. (multiple different ways and at different times throughout the diagnosing process)

*Removed all ram and just a single stick (multiple different known good sticks) & and two sticks

*Removed GPU

*Cleared cmos

*Bios Update

*Multiple different bios setting and power settings

*Adjusted all windows power settings plugged in and on battery (tho this is a pc)

I'm at a loss. There is no performance loss but having my CPU automatically overclock and fans at full speed all the time is not going to work.

Oh and on a weird side note, few nights ago was working on fixing this issue like usual and ended up accidently leaving the computer on all night (which I don't do because I don't like leaving the CPU overclocked it see's about 50-60c at idle) when I woke
up and went to turn computer off CPU usage was at 1-4%...!!!! I was shocked and thought that some how it must have updated widows and fixed the issue. But issue came back next re-boot.

SYSTEM SPECS:

Mother Board = z77a-gb65

CPU = i3 3240

RAM = 16g (4x4g 2 corsair 2 pny)

GPU = Gigabyte GTX 970 G1

Thank you to anyone that can help...