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Adept I

Ryzen 5950X processor usage in Task Manager wrong



I hope one of you could help me with this...

I upgraded from a 3900X to a 5950X and windows correctly reports 16/32 cores/threads, and I can see the 32 threads in task manager, but the CPU usage percentage shown in task manager seems to be wrong. I use this computer for distributed computing, and if I set the program to use 75% of the cores (which should be 24), task manager shows 100% CPU utilization (what would be 100% for my old 24 thread processor...).  HW monitor shows the correct utilization of about 75%. (see attached screenshot)

So I think there's hopefully no problem with the task scheduling, but only with task manager showing the CPU utilization like it would still be my 3900X?

Is there a way to fix this without a complete reinstall of Windows 10?

Appreciate your help!


Screenshot 2021-01-03 103611.jpg


ASUS ROG Crosshair VIII Hero, Ryzen 9 5950X, 64GB G.Skill Trident Z Neo 3600Mhz CL16, Radeon VII
1 Reply
Adept III

My understanding is this is normal as Windows doesn't properly tell when Zen cores are sleeping. There's no way to fix it, Microsoft needs to do that.