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To disable Catalyst AI right-click your desktop and select "Catalyst Control Center". On the upper-left click "Graphics", "3D". In the main area of the window, click the "AI" tab/button and check the "Disable Catalyst AI" option. Click "OK" to accept the changes and close the Control Center.
To disable Crossfire right-click your desktop and select "Catalyst Control Center". On the upper-left click "Graphics", then "CrossfireX". In the main area of the window, uncheck the "Enable Crossfire" option. Click "OK" to accept the changes and close the Control Center.
To disable SLI right-click your desktop and select "NVIDIA Control Panel". Expand the "3D Settings" section and click "Set SLI Configuration". Make sure that "Do Not Use SLI Technology" is selected in the right frame. Click "apply" and close the Control Panel.