1) Connect the TV to the card via displayport using the Club3D CAC-1080 Active DisplayPort 1.4 to HDMI 2.0b HDR Adapter. 2) When configuring the TV input, specify a ‘game console’ rather than a computer. Doing this forced the TV and Windows to negotiate HDMI, color, and HDR options. 3) In the display settings, turn sharpness to 0.
https://www.amazon.com/TCL-43S425-Inch-Ultra-Smart/dp/B07DK5PZFY

