Question CPU speed stuck at 0.52ghz

Jun 29, 2025
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Here are my Specs:
CPU: Ryzen 7 2700x
CPU cooler: Ryzen Wraith Cooler
Motherboard: MSI B450m Gaming Plus Bios (7B87v1H3(Beta version)
Ram: 32GB DDR4 corsair
SSD/HDD: 1TB NVME (windows location) 500GB SSD, 1TB HDD.
GPU: AMD Sapphire 7800xt 16gb
PSU:850wat Corsair (2 years old)
Chassis: Cyberpower
OS: Windows 10 (installed from USB with media creation tool on a separate PC)
Monitor: Samsung G5

So a few days ago I noticed my pc was acting extremely slow, rebooted and got an error message saying pc needs to be repaired. I then got an error code loop of error code 0xc0000221. I decided to wipe and fresh install windows 10. Booted it up after fresh install and it was still extremely slow. Checked cpu speed and it’s capped at .52ghz with no movement.

Decided to change power management settings in control panel and reboot and make sure all drivers and updates were good and nothing. Found a thread mentioning downloading Ryzen Master and turning off PROCHOT, did that and it worked but only if I turned off prochot.

Now that I’ve done that the PC is making the usb connection sound and all lights and supply shut off for about .5 second and come right back as if nothing happens and I’m still in windows. It happens every 20 Seconds or so and gradually gets quicker and quicker. Pretty confused about this, already took apart entire pc and reseated cpu and applied new paste but still nothing. The pc will keep on with that low speed but it’s extremely annoying and really slow.

I’m thinking it’s something with bios and speeds but I’d need help navigating that.
 
Last edited:
Welcome to the forums, newcomer!

Here are my specs:
Ryzen 7 2700x Amd 7800xt GPU 32gb DDR4 1TB nvme ssd Msi b450m gaming plus mobo 850w power supply

When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Where did you source the installer for your OS? Did you install the OS in offline mode, manually installing all necessary drivers with the latest version in an elevated command, i.e, Right click installer>Run as Administrator?
 
Might be slightly unrelated, but i had a dell micro PC that had a PSU that was under the recommended amp ratting and locked the CPU to .75GHz. i was able to use throttle stop to force it to the correct speed. After messing around with it for an hour or so i noticed it was using the wrong PSU, when i changed it out it returned to the correct speed.


If you can try to barrow another PSU and see if it solves the issue.