Stuttering issue

Hi all. I recently start to spend more time on the hackintosh build. There is an stuttering issue. I notice this issue after using new monitor " LG 27GP850". There is a short stuttering every 3 second I think it's only the screen stuttering (both mouse and video) but not including audio.

I have no good way to solve this issue, but I've tried below:

  1. Use HDMI cable: the stuttering issue becomes better but still.
  2. Delete whatevergreen: I just delete whatevergreen.kext, then system can't boot.
  3. DRM: I can't watch apple tv, I add some info to config.plist, but still can't work.
  4. radnoaudio: how to set this -radnoaudio to boot-flag?????

My build:

CPU:10900K

GPU: Gigabyte 5700XT gaming oc

MB: Gigabyte Z490 Vision G

OPENCORE: 0.6.7

OS: Catalina

submitted by /u/GY-guy
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