Hey everyone, I'm really frustrated with my main PC. Lately, I've been experiencing some severe stuttering, and upon checking, I noticed that my Intel i9-12900K is locked at just 0.40 GHz (400 MHz) when running Windows. I did update to Windows 11 version 25H2 during my troubleshooting phase, but I suspect the problem might have started even before that.
The strange part is that when I check the BIOS, the CPU frequency appears normal, showing around 3200 MHz, and the temperatures are fine (about 36°C). So, it seems like the hardware itself is functioning correctly, which makes me think that something in Windows might be limiting the CPU's performance.
Here's a quick overview of my system:
- CPU: Intel i9-12900K
- Motherboard: ASUS ROG Maximus Z690 Hero
- RAM: 32GB DDR5-6000
- GPU: RTX 3080 Ti
- OS: Windows 11 25H2 (but the issue might have started earlier)
I'm facing a constant stutter and sluggish input, even when the PC is supposedly at idle. Task Manager and monitoring software both show the CPU stuck at this low frequency, and my memory and disk usage seem normal.
I've already checked a few things:
- BIOS settings look normal, and temperatures are stable.
- I've tried rebooting multiple times without any luck.
- Even during the 25H2 update, my CPU was pinned at 400 MHz.
My main question is: what could be causing this hard clamp of the CPU frequency in Windows? Is it related to the power settings, an ASUS utility misconfiguring something, or maybe a driver issue?
I plan to reset power schemes, check processor power management settings, and potentially disable any ASUS or Intel tuning utilities for testing. If anyone has insights or solutions, it would be greatly appreciated!
5 Answers
It sounds like a driver issue or possibly a Windows setting that’s throttling your CPU. One thing you could try is booting from a live Linux USB. That might help you rule out any OS-related problems.
Great suggestion! Also, check the cooling; if there’s a problem there, it could affect performance even if temps seem fine.
Typically, when you see your CPU locked at such low frequencies, there are a few usual suspects: 1) Windows power policies, 2) thermal or power limits being reasserted by some application, 3) ASUS utilities or Intel drivers might be reporting erroneous limits. You might want to take a look at your power management settings.
Thanks for confirming those possibilities! I actually found that it was related to some services running in the background that I disabled.
Yes, definitely check those. It might also be an EDP OTHER error or some firmware issue that’s caused by recent updates.
I had a similar problem with my HP laptop. Stopping specific services in task manager finally did the trick for me. You could explore that route as well.
You might want to look into disabling any utility software from ASUS or Intel that could be managing your CPU settings. Sometimes they interfere with the standard operation and can cause issues like this.
When all else fails, consider updating your BIOS. I’ve seen that resolve similar issues. Also, try holding the power button for a bit after updating, as it can help reset power states.
I actually did try a Linux Mint live boot, and everything worked perfectly, which indicates the hardware is fine. This led me to think it’s definitely a Windows-specific issue.