Help setting up LG CX OLED with Radeon 6800 XT

High Hz on OLED produce excellent strobeless motion blur reduction with fast GtG pixel response. It is easier to tell apart 60Hz vs 120Hz vs 240Hz on OLED than LCD, and more visible to mainstream. Includes WOLED and QD-OLED displays.
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bwana
Posts: 19
Joined: 29 Jan 2015, 19:34

Help setting up LG CX OLED with Radeon 6800 XT

Post by bwana » 15 Jan 2021, 15:36

S0 I got an '8k certified 6 foot hdmi cable' , not because I have an 8k tv but because I dont want to deal with possible cable issues. From monoprice it was not too bad. Then I plugged it in to the HDMI port of the 6800xt, (Windows 10 build 1909) and also port#4 on the TV (the one on the back that says 120hz).

Then I hit input select button on the remote (looks like an RCA plug in between the Netflix and Prime video buttons) , scrolled to the left and hit dashboard. Then I went to the top right where there is a little gear with a green underscore - 'settings'? I hit that and scrolled down to HDMI 4 and changed that to PC. I am told this is needed to get the LG as a PC display.

Then I hit the gear icon on the remote and brought up the settings menu along the left margin. Scrolled down to ALL settings. Then went to picture then picture mode settings. Here I selected 'game mode'. Contrast, brightness I left alone. I went down to options. Turned off motion eye care and the went down one to Tru Motion and set that that to OLED Pro Auto.

Then I went back to ALL settings-> picture->Additional Settings and set Ultra Deep Color, Instant Game response, and AMD Freesync Premium to on.

Now I went to the Radeon control Panel, hit the gear icon in the top right and selected the Display tab. Here I turned on Adaptive sync compatible. Color depth is 10 bpc and Pixel Format is YCvCr 4:4:4.
Display specs says this:
Timing Info Horizontal Vertical
Timing Total 4400 2250
Timing Display 3840 2160
Timing Front Porch 176 8
Timing Sync Width 88 10
Timing Polarity positive positive
Interlaced/Progressive progressive
G.Pixel Clock 594000
G.RefreshRate 60
HDMI link status monitoring disabled
Current Link Settings not available
AMD Freesync Refresh Rate 40 to 60 Hz reported by display

Well, that's not right (60Hz?) so I tried to make a custom resolution
I created a custom resolution with these settings:
Resolution 3840x2160
RefreshRate 120
Presentation progressive
Timing standard manual
G.Pixel Clock 497750
G.RefreshRate 39.859
Timing Info Horizontal Vertical
Timing Total 5392 2316
Timing Display 3840 2160
Timing Front Porch 352 3
Timing Sync Width 424 5
Timing Polarity positive positive

Hit save and it said 'This base mode combination already exists. Do you want to replace the existing settings. Well, since I couldn't find any of the 'base modes' I clicked save.

Went to blurbusters motion tests and the flying saucer guy was laughing at me saying 60Hz.
Went back to create another custom resolution but it seems it only shows one. No matter how many times you click 'create new' , if you use a specific resolution, it only lists that one.

I tried

So I went back to create a new resolution changed
Timing Info Horizontal Vertical
Timing Total 4400 2250
Timing Display 3840 2160
Timing Front Porch 176 8
Timing Sync Width 88 10
Timing Polarity positive positive
G.RefreshRate 120

Hit save , said yes to the confirmation box, the display blinked at me but UFO guy still said 60Hz.

I havent had this much fun since configuring a display Geforce 2 MX card in a pentium 3 running windows xp.
So then I right clicked on the desktop, clicked display settings and changed resolution to 2560x1440. Why do I not get to choose a refresh rate in this silly new settings panel? Anyway I did that then went into the Radeon panel->settings->Display and created a new custom resolution

Resolution 2560x1440
RefreshRate 120
Presentation progressive
Timing standard CVT-Reduced Blanking
G.Pixel Clock 497750
G.RefreshRate 119.998
Timing Info Horizontal Vertical
Timing Total 2720 1525
Timing Display 2560 1440
Timing Front Porch 48 3
Timing Sync Width 32 5
Timing Polarity positive positive

The UFO guy is still saying 60Hz.

So now I am here asking for help.

bwana
Posts: 19
Joined: 29 Jan 2015, 19:34

Re: Help setting up LG CX OLED with Radeon 6800 XT

Post by bwana » 15 Jan 2021, 17:38

Wow...setting refresh rate on Windows 10 pro 1909 is kind of obscure

https://ibb.co/rxkZC09

You have to list all modes and select it!
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win.jpg
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Chief Blur Buster
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Location: Toronto / Hamilton, Ontario, Canada
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Re: Help setting up LG CX OLED with Radeon 6800 XT

Post by Chief Blur Buster » 15 Jan 2021, 22:51

I've been complaining about the difficulty of switching refresh rates for years.

Click Monitor tab at the top.
Screenshot 2021-01-15 21.49.46.png
Screenshot 2021-01-15 21.49.46.png (15.45 KiB) Viewed 6285 times
However, the new Windows Insider Build makes it easier --
Refresh Rate Setting Now Easier on New Windows 10 Insider Builds To Rescue 144 Hz Monitors Left at 60 Hz For Months

Image

However, it will still be a while before this becomes live.

Although the OP has an AMD card, if you have an NVIDIA graphics card, accessing NVIDIA Control Panel can be a faster way to do so:

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