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Opera screen flicker issue on Windows 11

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  1. Remove opera executable items from "System > Display > Graphics" settings if there are any.
  2. Make sure "Hardware Acceleration" is turned ON in opera system settings, turning it off causes heavy performance degreadation. System Settings
  3. Go to "NVidia control panel"
  4. Go to "3D Settings" → "Manage 3D Settings"
  5. Go to "Program Settings" tab
  6. From "select a program to customize" choose the process with opera logo (launcher.exe)
  7. From the prefered graphics processor pick "Integrated graphics"

Now opera uses Integrated graphics as the main gpu but switches to NVIDIA when necessary .