No 4k HDR in W10 on new TV (while in FullHD working perfectly)

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Hi, I have a new TV connected to my PC and I wanted to use the HDR functions, but I am only able to do this in Full HD resolution. (In 4K the switch isn’t grayed out, but switches immediatly back to “no”. there aren’t any preview images like in FULLHD aswell. In the Windows-HD-Color Window, while using 4k, in the graphics driver dynamic output can’t be switched to full. Why is that so? Any tipps? Please help

  • AMD Ryzen 1600@3.8GHz
  • 16 GB DDR4 Ram
  • Asus Geforce GTX 1060 DUAL 6GB…

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