I have this monitor. Freesync 2 - LFC technology isn't working correctly.
Ultimage Engine/LFC = 48 - 144 Hz. Flickering.
Standart engine = 120 - 144 Hz. No Flickering.
Samsung CHG90 have LFC problem with both AMD Vega 64 and NVIDIA 2080Ti.
Many users have freesync flickering (ultimate engine - lfc) on this monitor.
What's the solution?
Have you tried these steps?
Once you have installed the latest compatible driver and restarted your system:
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