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PC Processors

Diocenes
Journeyman III
Tuesday

Ryzen 7 9800x3d High CPU Usage Issue on 1920x1080 165Hz Monitor

Hi everyone,
I'm facing a strange issue with my system and would greatly appreciate your insights and suggestions. Here's my setup and the problem I'm experiencing:

System Specs:

  • Processor: AMD Ryzen 7 9800X3D
  • GPU: EVGA RTX 3080
  • Monitor: 1920x1080 165Hz
  • Motherboard: MSI MPG X870E Pro Carbon Wi-Fi
  • RAM: G.Skill DDR5 64GB (2x32GB) 6000 MHz
  • Cooling: Cooler Master MasterLiquid ML360

The Issue:

  • When gaming on my 1920x1080 165Hz monitor, my CPU usage stays around 80-90%.
  • When I lower the monitor's refresh rate to 60Hz, CPU usage drops to 30-40%.
  • Interestingly, when I connect a second monitor (4K, 60Hz), the CPU usage also drops to 30-40%, even with the 165Hz monitor still connected.

What I've Tried:

  1. Enabled G-Sync and V-Sync.
  2. Set a 165 FPS limit.
  3. Updated NVIDIA drivers.
  4. Increased graphic settings to shift the load to the GPU.
  5. Reduced the monitor's refresh rate to 120Hz, but the issue persists.

Questions:

  • What could be causing this behavior?
  • Has anyone else experienced a similar issue?
  • Any suggestions or solutions are greatly appreciated!

This format is clear and professional, making it easier for others to understand your issue and provide effective solutions. Good luck on the forums!

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7 Replies
izederf
Adept I
Tuesday

Hi,

Hmm... i dont own R7 9800X3D chip im waiting for the 9950X3D to launch anyways... i think you need to change ur 1080p monitor to at least 2K monitor (is just a theory) but before doing that try to update ur motherboard BIOS to the latest version maybe that will fix the cpu usage

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Diocenes
In response to izederf
Journeyman III
Wednesday

 

Thank you for your response! I appreciate your help and wanted to clarify the issue further. I’ve recorded a video showcasing the problem I’m experiencing with my 1920x1080 165Hz monitor.

In the video, you can see how CPU usage decreases significantly when switching to 60Hz, while it remains extremely high at 165Hz, even with an FPS limit. I’d like to hear your thoughts on this and if you have any additional suggestions.

Here’s the link to the video: https://www.youtube.com/watch?v=vnmKadQbAW4

Thanks again for your time and support!

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misterj
Big Boss
Tuesday

Diocenes, why do you think this is an issue? Microsoft has not figured out how to deal with usage for a multiple core processor. Use Ryzen Master (RM) to see what is really happening. John.

Diocenes
In response to misterj
Journeyman III
Wednesday

Thank you for your response! I appreciate your help and wanted to clarify the issue further. I’ve recorded a video showcasing the problem I’m experiencing with my 1920x1080 165Hz monitor.

In the video, you can see how CPU usage decreases significantly when switching to 60Hz, while it remains extremely high at 165Hz, even with an FPS limit. I’d like to hear your thoughts on this and if you have any additional suggestions.

Here’s the link to the video: https://www.youtube.com/watch?v=vnmKadQbAW4

Thanks again for your time and support!

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misterj
In response to Diocenes
Big Boss
Wednesday

Diocenes, post screenshots of Ryzen Master (RM) at both frame rates. Movies are not needed. Again why do you think CPU utilization is a problem? John.

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Diocenes
In response to misterj
Journeyman III
Thursday

While troubleshooting some performance issues, I observed significantly different results when X3D Game Mode is enabled and disabled. I would like to share my findings and get your thoughts or suggestions on the following:

 

Observations:

  1. When X3D Game Mode is Enabled:

    • CPU usage is around 80-90%.
    • CPU temperature remains stable at 70°C.
    • Graphics settings are maxed out, and refresh rate is locked to 165Hz.

  2. When X3D Game Mode is Disabled:

    • CPU usage drops to around 40-50%.
    • However, CPU temperature rises significantly to around 80-90°C.
    • Graphics settings and refresh rate are the same: max settings and 165Hz.

  3. When Refresh Rate is Reduced to 60Hz:

    • With X3D Game Mode enabled: CPU usage drops significantly to 40-50%, and the CPU temperature stays stable at 70°C.
    • With X3D Game Mode disabled: The temperature still increases even though CPU usage remains low.

Questions I’m Struggling With:

  1. Why does CPU temperature increase when X3D Game Mode is disabled, even though CPU usage is lower?
  2. What causes the CPU usage to drop significantly when X3D Game Mode is enabled and the refresh rate is reduced to 60Hz? Could this be related to specific technologies or optimizations?
  3. What could be the underlying reason for such a big difference in behavior when X3D Game Mode is toggled on or off?

I would greatly appreciate any insights or suggestions you might have. If anyone has experienced something similar or has a better understanding of how X3D Game Mode affects performance, I’d love to hear your thoughts!

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misterj
In response to Diocenes
Big Boss
Thursday

Diocenes, I would appreciate the screenshots of RM I requested.

Game mode in RM turns off half the cores, so yes it will lower temperature. A screenshot of RM will show half the cores are Sleeping. Please post the screenshots. John.

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