[mkohman]

I have managed to sort the issue out (well) part of .. So The issue I was having was in the video decoder in Kodi DS Player and MadVR I have the "Hardware Decoder to Use" as D3D11 selected but had the "Device to Use" as the Radeon RX560.. However when I changed the "Device to Use" to Automatic (Native) the playback was smooth and rendering is around 16ms for 4K H265 movies.

This was with HDMI plugged straight from the card to my 4K Sony TV and HDR was automatically detected. However when I plug it into my Projector (JVC x5900) via my Anthem AVM60 the playback is again smooth but it isn't automatically switching the picture mode to HDR.. It's showing the picture setting at natural and the video is still 8bit rather than 10bit in the JVC info panel when I hit the info button.

Also sometimes when I stop playback sometime I just get "No Signal" displayed on my Anthem and no picture on the JVC.. I am not sure if this is an issue with the motherboard and GPU. My GPU is RX 560 4GB DDR5 PCI-E 3rd gen whilst my motherboard is a LGA1156 with an intel i3 PCI-E x16 slot but Gen1 so technically the card is running in a Gen 1 mode I guess. If this is the case I may need to buy a new motherboard, a new i3 or i5 or i7? and new DDR4 ram along with a new PSU as my current PSU is 300w...

OR it just may be a case that my PSU is not powerfull enough? I would really appreciate the help if you can please. Thank you ..

Edit: My CPU load is around 20-30% so nothing major at all when playing 4K movies.. Also Ram is around 55% .. I have 4GB DDR3 ram..