Windows 10: CPU stuck at 0.5 GHz after tueday patch KB5008215

Hi,I encountered a weird bug with the last Tuesday patch. I couldn't log in after the first reboot. My mouse was stuttering and I was unable to type my password or anything...Second reboot seemed fine but after a while I noticed my Ryzen 9 3900X was struggling doing some basic stuff like web browsing, reading emails...I opened task manager and saw the CPU frequency was stuck at 0,5 GHz screenshot.I think it was working fine for a few hours and then locked itself at 0,5GHz.I had a few reboot to see how it goes, tried a few tricks I saw online disabled game mode, disable fast startup..., not

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CPU stuck at 0.38 Ghz when charger is plugged in.

Thanks for your reply, unfortunately none of these suggestions changed anything and the CPU speed still immediately drops to 0.38 Ghz when I plug it in. Is there anything else I could try?

 

CPU frequency locks at 0.78 GHz

Hello,

My CPU get locks at 0.78 GHz and not going up or down. In the same time when CPU is locked at 0.78 GHz,

laptops fans runs fast (noisy) but the coming air is not even hot.

I have found a tool named Intel(R) Extreme tuning utility to use it as monitor of "what's going on with my system",

i'm not overclocking or changing something in CPU.

Tuning utility shows value of "Thermal Throttling" as 100% i think this is the reason why CPU stays at 0.78 GHz, it get down step because of this thermal throttling.

CPU package and core temperature is normal around 40c .

All this information is visible into this picture:



With random combination of reboots, shutdown unplug power and plug power CPU gets frequency stepping again

Thermal Throttling is becoming zero and fans stop... and everything goes normal.

Can someone explain what is connection between Windows (10) OS and CPU freq. stepping.

I think there is some connection because of available options in power plan settings, there is options Processor power management

that can control CPU min and max freq. state, but i'm not pretty sure is it related to "Thermal Throttling".

 

Help!!!! CPU operating at only 0.51 GHz

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Look at the Performance tab and at the bottom click Open Resource Monitor, check if you are seeing only 1 core out of the 2, 3 or 4 on the CPU. I get different speeds depending on the core, usually waiting a bit will step through the cores.