Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Yes, works fine in both SDR and HDR. Switching to 100/120 Hz is where things fail.Can you do 4:4:4 at 60hz ?
RGB is RGB and is the highest quality. It's a very noticeable difference for PC use with text.
But the problem is what the TV does when receiving that signal. Right now at anything higher than 60hz (with 4k) it's converting it to something like 422 (or somewhere between 422 and 444).
Understood. For testing purposes how to you tell that the TV is converting / down sampling to the lower format? Just eyeball or is there a diagnostic mode on the TV to see what format its actually outputting?
How? There is absolutely no mention of the downsampling.
Based on the appearance of the image, the GPU is indeed sending a true RGB signal. 4K 120 Hz RGB internally downsampled with PC icon looks identical to 4K 60 Hz RGB internally downsampled without PC icon. With PC icon, 4K 60 Hz RGB is not downsampled.
Take a look of this video showcasing the 3080 along with a 48 CX (link takes you to 4:23 timestamp). Sorry for the noob question but what's the difference between setting the output color format to RGB vs 4:4:4 vs 4:2:2 in the NVIDA interface? Does RGB = 4:2:2? If so why present both options?
Where do you view/change the colour settings in the NVIDIA control panel? For 4:4:4 or 4:2:2 etc?
Hmm, so he was able to select 120 Hz @ 10-bit with RGB. Interestingly, it looked like 12-bit and YCbCr444 were available in the drop-down boxes as well but he didn't try them. I suppose the only question is if the TV downsamples internally, and how noticeable that is. Personally, I don't care and am definitely in for a 3000 series card...I'm currently using 120 Hz with 4:2:0 and find it to be perfectly acceptable using it 8+ hours a day for work etc. but I would certainly welcome an improvement to small red text when I encounter it (error messages in PowerShell can be particularly difficult to read, but I only use PS occasionally).
RGB is 444. YCbCr 444 just has to be converted to RGB.
Since RGB-format images don't have luma or chroma components, you can't have "chroma subsampling" on an RGB image, since there are no chroma values for you to subsample in the first place. Terms like "RGB 4:4:4" are redundant/nonsensical. RGB format is always full resolution in all channels, which is equivalent or better than YCbCr 4:4:4. You can just call it RGB, RGB is always "4:4:4".
Also, chroma subsampling is not a form of compression, because it doesn't involve any de-compression on the receiving side to recover any of the data. It is simply gone. 4:2:2 removes half the color information from the image, and 4:2:0 removes 3/4 of it, and you don't get any of it back. The information is simply removed, and that's all there is to it. So please don't refer to it as "4:2:2 compression" or "compressed using chroma subsampling" or things like that, it's no more a form of compression than simply reducing resolution from 4K to 1080p is; that isn't compression, that's just reducing the resolution. By the same token, 4:2:2 isn't compression, it's just subsampling (reducing the resolution on 2/3 of the components).
Where do you view/change the colour settings in the NVIDIA control panel? For 4:4:4 or 4:2:2 etc?
It doesn’t seem to be a bandwidth issue because it happens at 8-bit color as well and 1080p 120 Hz.
Just tested with 1080p and happened as you said, only 59 and 60hz displayed 4:4:4 but for 120hz, 100hz and even lower refresh rates like 50hz and 30hz were displayed at 4:2:2. Damn. Is there a link were we could report this and LG actually listen to it? If someone like Linus Tech Tips did a video criticizing this issue I bet LG would get this fixed in a week.
So basically, putting aside some of the other known issues, the two big ones at the moment:
1: Black screen when VRR is enabled; affects C9 and CX [Likely NVIDIA driver bug?]
2: 120Hz resolutions being downsampled to 4:2:2; 60Hz resolutions display 4:4:4 as expected; affect CX, works on C9.
The first will get fixed by NVIDIA shortly. The second is likely a firmware bug given the C9 works as expected; its just a matter of brining it to LGs attention.
Was bored, so I decided to play some Battlefield 4 @ 4K, max settings.
1440p with 200% scale? Why not just play at 4k then? Since you seemingly have the horsepower for 5k.
Yeah, I've gotten back into BF4 since picking up my 55CX. I do 1440p all settings maxed, with nVidia sharpening and 200% resolution scale. It's basically pegged at 119FPS, looks like 4k, runs like silk. It's fun as hell operating all the big ass vehicles on this big ass screen. Flying around in choppers and jets is fucking bliss. Makes me want to get into flight sims, it seems so realistic!
A resolution scale slider exists in the in-game video options. Sharpening can be applied via the GeForce Experience overlay.Great. Where do you find the settings for 200% scaling and shaprening?
Hopefully 422 is firmware-eable . .....
And they get it straightened out by november
Darn it. I should have waited before buying three of these. For multi monitor gaming.
I have spent $5000 on something I didn't know would work well enough...or at least yet.
Ugh.
Darn it. I should have waited before buying three of these. For multi monitor gaming.
I have spent $5000 on something I didn't know would work well enough...or at least yet.
Ugh.
Darn it. I should have waited before buying three of these. For multi monitor gaming.
I have spent $5000 on something I didn't know would work well enough...or at least yet.
Ugh.
I still dont get why you would buy 3 of these instead of a kickass VR setup. Seems like a no brainer for Sim pits, where you can look around and really feel like you are in the game
kasakka - Yeah. I just hope I can eventually get the 3 @ 4k 120 hz - preferably in HDR, which also doesn't seem possible right now. I hope getting another Club 3d adapter and going all display port will help me with this, along with a fix from LG. Maybe I have to start with them at @60hz for a while. Certainly this must be fixable through firmware? They have to do it. They've advertised this display as being that capable, touting the features. And maybe the move from my old Pascal Titan XP's to a 3090 will help. I have no idea.
Have you tried if they work at say 1080p or 1440p 120 Hz together? I think your use case is a very specific niche thing. The Pascal Titan XPs are most likely part of the problem, I don't know if they even support DP 1.4 and they definitely don't support it with DSC so the Club3D adapter might not help.