MainThread Stuttering every few seconds



The issue happens every time I fly to WFSS ZBAA.
And sometimes it happens at other airport, but I don’t know the trigger of it.
Stutter happens both in game and in the menu, as shown in the picture.
I found that when I turn down the FPS limit (for exemple, to 50% of screen refresh rate), the frequency of stutter also get lowered.
I have already tried:

  1. changing all graphic settings
  2. updating GPU driver
  3. refer to [SOLVED] MainThread Stuttering at Equal Intervals

My desktop specs:
AMD Ryzen 5 5600X 6-Core Processor
RAM 32.0 GB
GTX 3080Ti 12GB
DX11

I’ve seen many similar topics, but their problem seems a little different than mine, wonder if anyone has similar issue
Thanks!

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