I just got an RX 470 for my HTPC and was excited to finally have HDMI 2.0 for some 4:4:4 RGB action. However, Radeon Additional Settings doesn't seem to be displaying the options properly. This is what I see: http://i.imgur.com/NbCqFon.png
To clarify, I have a Sony XBR55X810C, a 4K TV with the capability to display 4K 60Hz at 4:4:4, as noted in this review: Sony X810C Review (XBR55X810C, XBR65X810C)
(I have set the TV's HDMI mode to Enhanced)
In the past, I have used 4K 60Hz on a 980 Ti without issue on this TV. I am uncertain as to why the Radeon software is having an issue here. Any help would be appreciated, thanks!
P.S. I am aware that the RX 470 is not a good 4K card, and I do not plan to try and game at 4K.