[Warner306]

Hi, why is rendering so high when watching a 4k HDR movie for chroma, no upscaling should be taking place if i'm outputting in 4k and passing HDR thru.   

 You are forgetting the source started with chroma subsampling. It must be chroma upscaled to match the luma layer. All video requires this kind of upscaling. At 4K, this is a big upscale.

Are you using any image enhancements?  

 right got you, someone has just explained that to me on MADVR forum, that makes sense now thanks.

I probably need to look at creating some profiles at some point, i've been trying to keep my setup as simply as possible but its getting to the point where I want more out of it. I'm getting a little more out of my RX460 card, when prices come down i'll probably get a next gen high end AMD.

Thanks for explaining that. 

 Again, my guide has many starter profiles. Some with resolution alone. And some with frame rate and resolution incorporated together.