display custom setting

[Brookja]

I am currently using an asus strix rx 480 08G gpu running via hdmi to a lg 55uh6090 (lg 4k 60hz affordable tv. my question.. is there either a link so I can learn the needed exact specs to provide for custom resolution settings in amd's radeon software and also correct specs to put together my own monitor.ini file so that windows 10 is able to understand with the least amount of error what it can do with my lg 55uh6090. I know it wont be perfect and I'm most likely going to have do some research for these specifics. I will be ever so thankful for the ones who are willing to help with this task.
here is the specs that I'm getting as far as radeons software
Horizontal Timing Total - 4400
Horizontal Timing Display - 3840
Horizontal Timing Front Porch - 176
Horizontal Timing Sync Width - 88
Vertical Timing Total - 2250
Vertical Timing Display - 2160
Vertical Timing Front Porch - 8
Vertical Timing Sync Width - 10
Horizontal Timing Polarity - Positive
Vertical Timing Polarity - Positive
Interlaced/Progressive - Progressive
G.Pixel Clock (KHz) - 594000
G.Refresh Rate (Hz) - 60
Current HDCP Status - Enabled
Current Link Settings - Not Available

 

[Eximo]

I guess understanding your goal would be useful to know.

4K 3840x2160@60hz is all the HDMI 2.0 port will do, not a lot of wiggle room there.
Typically 4K panels can only natively handle 1920x1080 and 1280x720. You might be able to get 2560x1440 working, though it will probably look odd.