Worst case scenario, I start seeing some static burn in running at 70 oled light for about a year, I'll live with it. I just want bright clear visuals in daytime hours, and I can go dimmer out of necessity at night when that might be too bright for desktop. I don't need this display to last me 10 years, or even 5. If I get 3 years of current use out of it with no issues, I'll consider that money well spent. 3 years is a good chunk of time for display makers to sort out and jump to the next display level that gets us to higher ground on the path the the summit of 4-10k nit emissive displays.
![[H]ard|Forum](/styles/hardforum/xenforo/logo_dark.png){kind=logo}
LG 48CX
- Thread starter gan7114
- Start date
Worst case scenario, I start seeing some static burn in running at 70 oled light for about a year, I'll live with it. I just want bright clear visuals in daytime hours, and I can go dimmer out of necessity at night when that might be too bright for desktop. I don't need this display to last me 10 years, or even 5. If I get 3 years of current use out of it with no issues, I'll consider that money well spent. 3 years is a good chunk of time for display makers to sort out and jump to the next display level that gets us to higher ground on the path the the summit of 4-10k nit emissive displays.
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
Not I, I've been checking for it since I saw your first message. Are you in Europe?
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
No, I'm in the U.S.
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
It looks like the TV cannot do 4:4:4 at 120 Hz, even with the 3000 series cards. The adapter sends RGB without subsampling. 1080p 120 Hz RGB also renders only in 4:2:2 when connected directly to the GPU.
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
Me too, no Idea then. They must be releasing it in rings.
The strange thing is I do get full RGB with 1440p120hz (I don't have the adapter). But yes, it doesn't work at 1080p (you can select RGB but it's clearly 4:2:2 if you use test patterns), which makes no sense and is likely a bug.
MistaSparkul
2[H]4U
- Joined
- Jul 5, 2012
- Messages
- 3,479
Yeah hopefully LG fixes it because not being able to have 4k120Hz with RGB Full on Ampere is going to piss a lot of people off.
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
Unless I'm reading this completely wrong, I'm getting 1080p/120hz/RGB no problem? I can do the same with 1440p. This is no adapter, just HDMI port on a 2080Ti.
But does it look like RGB on test patterns? For example the Rtings one: https://www.rtings.com/images/test-materials/2017/chroma-444.png the last 2 lines are the biggest offender. They only look perfectly clean with RGB.
1080p 120hz RGB is definitely not RGB for me (1080 ti right now if that matters), the TV downsamples it to 4:2:2 (which is not nearly as bad as 4:2:0 but can still be an issue). The last line of that picture I linked is a bit fuzzy. Switch to 1080p 60hz (or 4k 60hz or 1440p120hz) and it looks perfect.
1080p 120hz RGB is definitely not RGB for me (1080 ti right now if that matters), the TV downsamples it to 4:2:2 (which is not nearly as bad as 4:2:0 but can still be an issue). The last line of that picture I linked is a bit fuzzy. Switch to 1080p 60hz (or 4k 60hz or 1440p120hz) and it looks perfect.
MistaSparkul
2[H]4U
- Joined
- Jul 5, 2012
- Messages
- 3,479
The TV may report RGB but that doesn't mean it's actually outputting it. From RTINGS:
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
Yeah I just tested this a bit. It seems that all the resolutions NVCP considers "PC" do RGB properly above 60hz (except 3840x2160+ of course because of bandwidth limits). All the "Ultra HD, HD, SD" switch to 4:2:2 above 60hz (including 100hz, 110hz, and 119hz. I didn't try making custom resolutions between 60hz and 100hz.). It seems like it's something that might be able to be gotten around with EDID trickery, or the "PC" 3840x2160 that you currently use to do 120hz/4:2:0 will just work at RGB with HDMI 2.1 bandwidth. If that last part is the case, that might be a big fuck you to C9 owners because I don't think they have the "PC" 4k resolution...
Last edited:
Lateralus
More [H]uman than Human
- Joined
- Aug 7, 2004
- Messages
- 18,494
I think that’s extremely likely, given the behavior that it’s exhibiting on the other resolutions that current cards can support in terms of bandwidth. Also - good call - I keep forgetting that there are two sets of resolutions. I just assumed that nearly everyone in this thread would be using the PC set of resolutions but it’s possible that some aren’t, and that could certainly explain some of the discrepancies in behavior/image quality/available settings.
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
2560x1440 120 Hz is an exception. Other 120 Hz resolutions are subsampled to 4:2:2.
There is no difference between the two sets of resolutions. Everything up to 4K 120 Hz is defined in the "TV resolutions" EDID data block. 1440p 120 Hz is only exception and is defined as a "Detailed resolution".
The GPU can always output RGB if there is enough bandwidth. The issue is the TV seems to subsample 120 Hz to 4:2:2 internally.
Last edited:
Its not even up on their support site for offline download and USB install.
Oh well, will trickle down across the globe with time.
Hopefully LG still patches things and keep the firmware updates going past 2022... wishful thinking, I know.
jincuteguy
Limp Gawd
- Joined
- Jul 25, 2008
- Messages
- 408
Where do you check to see if it's 422 or not?
jincuteguy
Limp Gawd
- Joined
- Jul 25, 2008
- Messages
- 408
How dco you check to see if it's 422 or not?
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
There's no way to check without a test pattern. The TV will report RGB input.
Lateralus
More [H]uman than Human
- Joined
- Aug 7, 2004
- Messages
- 18,494
Ok yeah, thanks for the clarifying edit, I see what you’re saying now. I assumed that they were different because mirkendargen said that
So from what I understand there’s no practical use for that set of resolutions, yeah? At least when this is being used as a monitor where text clarity is important.
MistaSparkul
2[H]4U
- Joined
- Jul 5, 2012
- Messages
- 3,479
Is this something that can be fixed with a firmware update?
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
I don't know what the adapter is doing, but this is easy to test, and is not what you are saying.
1. Plug the TV straight into the HDMI port of your GPU.
2. Pick a resolution
3. Set color to RGB
4. Switch back and forth between 60hz and higher while looking at a test pattern. You will see on the "TV" resolutions that it drops to 4:2:2, and on the "PC" resolutions it does not.
5. Confirm what you're seeing. Pick a resolution, set the refresh rate above 60hz. Toggle color between 4:2:2 and RGB. On "TV" resolutions you will see no change, on "PC" resolutions you will see a change.
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
Sorry, I forgot to turn on PC icon when testing 2560x1440 120 Hz.
All the "PC" resolutions below 2560x1440 are virtual resolutions created by the GPU - they are just letterboxed in a 2560x1440 image.
I see that the 2560x1440 120 Hz is in fact 4:4:4, and thus the virtual resolutions below it.
There is still nothing special about the "PC" resolutions - it's an arbitrary segregation in NVCP. It's the TV that is handling 2560x1440 120 Hz RGB differently, and not doing the same for 1080p & 4K 120 Hz RGB.
3840x2160 120 Hz RGB appears under "PC" resolutions, but that's subsampled too.
The adapter isn't doing anything. It passes through whatever colour format you've selected. There's a bug where it drops to 4:2:0 on the HDMI side sometimes, but that's immediately visible.
It doesn't seem to work. The GPU sends the adapter 3840x2160 120 Hz RGB, and the TV reports receiving RGB. Yet the image is subsampled.
The 3840x2160 120 Hz resolution is defined in the "TV Resolutions" EDID block without any special timings on the CX, and probably on the C9 as well.
Last edited:
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
Only LG can answer that. I don't know why they would support 1440p 120 Hz at 4:4:4 but not 1080p. At least 4K could be seen as an oversight as there weren't any sources.
They updated the firmware on my B6 for about three years, so I'd imagine the firmware updates will keep coming. I suspect a lot of these bugs will get fixed once proper HDMI 2.1 sources come available.
In the mean time, someone might want to actually bother to ring LG support to get the ball rolling.
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
Nvidia too with the dog and pony show they've done around these being officially "BFD's" and what not. I expect they'd pressure LG to fix it if LG wasn't already planning to.
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
You can do it with 1080p too....but I doubt there's a whole lot of testing looking closely at 120hz 1080p RGB sources either.
l88bastard
2[H]4U
- Joined
- Oct 25, 2009
- Messages
- 3,712
Club 3D adapter.....is disappointing so far.....ugghhhh.....getting ready to send back to rentazon
Monstieur
Limp Gawd
- Joined
- Jun 10, 2011
- Messages
- 440
I reported the 4:4:4 and Screen Shift issues to LG.
It's a start; might want to pile on that. More unhappy customers = faster response time.
Got a link or email address for us to all pile on?
cybereality
[H]F Junkie
- Joined
- Mar 22, 2008
- Messages
- 8,789
What, so complaining actually overclocks the panel?
Form what others have said it might be the tv....Wich doesn't bold well for 4k 120 at rbg
mirkendargen
Limp Gawd
- Joined
- Dec 29, 2006
- Messages
- 435
All the issues with having to unplug the adapter power/restart when changing screen modes definitely isn't the TV.
l88bastard
2[H]4U
- Joined
- Oct 25, 2009
- Messages
- 3,712
Yea this is whats killing it for me.....got desktop stable, playing halo MCC stable....then go to play some shitty BFV and the whole screen goes black haywire blanking clusterfuck from hell. When every different game you want to play has to go through a dick dance of blanking screen hell....man it gets old fast.
I may keep my Alienware 55 yet, as its still the only OLED on earth capable of 4k120 Full RGB 8bit VRR
Confirming, good quality usb-c to hdmi2.0 and 4k@60 works perfectly on OSX. Couldn't be happier with this display (except maybe the glare is a bit too much at times)
You can name it anything you want, but the icon chosen matters. Press Home, select Dashboard, Settings, Edit, then set the icon for your input to PC.
Stryker7314
Gawd
- Joined
- Apr 22, 2011
- Messages
- 867
Was looking foward to picking one up when Titan A releases, really want to check out the BFI, think I prefer it to VRR, I would reduce settings to keep fps above 100 if I had to. But these issues are showstoppers.
AW55 can do 8bit + dithering too with HDR enabled. Going to try the Calibration Tools program Elvn mentioned to see if dithering can be enabled without enabling HDR. But no, don't keep it and sell it to me! lol
AW55 can do 8bit + dithering too with HDR enabled. Going to try the Calibration Tools program Elvn mentioned to see if dithering can be enabled without enabling HDR. But no, don't keep it and sell it to me! lol
It's comical how worthless all these media sources are. They're literally paid to review this hardware and provide consumers with information like this, but nope. As always, all the real information comes from the community of users and not the paid shills.
Thank you!