4K TV not showing 4:4:4 properly with GTX 1070

Toggle sidebar Toggle sidebar
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
Hello,

I have a LG 43UJ635 I use as monitor. My GPU is a GTX 1070, resolution 3840x2160@60Hz, Nvidia driver 384.76. The TV is suppose to support 4:4:4 (according to customer service) and I have enabled the function on the TV. But when I look at the picture here http://i.rtings.com/images/test-materials/2017/chroma-4... , I can't read the last two lines. If I then enable HDR and Advanced Colours, the last two lines are readable, but the screen goes dimm - I guess because of the infamous Win10 Creators upgrade.

It definitely feels like there is something wrong with the colours and my eyes get tired from reading because the text blurs out slightly.
I have tried downgrading to 372.98 but that didn't help at all.

What am I doing here? Is it the general problem with the new Nvidia driver? Or can I change something?
Edit: would it change anything to switch to a DVI -> HDMI cable? I can see that some people are mentioning that (although I can't see why it would matter).
 
Last edited:
nathanddrews

nathanddrews

Graphics Cards, CPU Moderator
Aug 9, 2016
965
534
136
www.youtube.com
This LG 4K TV is not native 4K/UHD resolution. It's a massive scam, return it if you can. They use an RGBW LED pixel layout that cannot properly display 3840x2160. The TV will accept any video signal and internally scale it to its native ~3.5K resolution.

7553095570c7ab372a6a.jpg
 
A

amenx

Diamond Member
Dec 17, 2004
4,301
2,633
136
Have different 4k TV (40" samsung ku7000) with a gtx1070 and win 10 creators update, no problem here. Try different better quality HDMI cable. DVI > HDMI cable not recommended, it wont fix anything in or of itself.

Most likely the issue is in the Nvidia control panel, where you have to manually select RGB mode to "full" rather than 'limited. Also on some TVs (Samsung) you may have to rename the HDMI source to PC mode, which for some odd reason seems to 'fix things'. Not sure if your TV is similar.

edit: missed above post.
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
Thanks both of you! I also found out that it's the RGBW LCD that's at fault.

I'm also mainly in the camp for returning it. I've heard that Samsung's input lag is higher, but I obviously can't find a place to verify it. Can you recommend any alternative 43" TVs that would well connected to a PC?
 
mnewsham

mnewsham

Lifer
Oct 2, 2010
14,539
428
136
Hemming404 said:
Thanks both of you! I also found out that it's the RGBW LCD that's at fault.

I'm also mainly in the camp for returning it. I've heard that Samsung's input lag is higher, but I obviously can't find a place to verify it. Can you recommend any alternative 43" TVs that would well connected to a PC?
Click to expand...
I'd recommend a 43" 4k monitor.

Dell has one and Phillips has one as well.

They're more expensive, but far lower input lag, and much higher quality in general.
 
  • Like
Reactions: Hemming404
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
mnewsham said:
I'd recommend a 43" 4k monitor.

Dell has one and Phillips has one as well.

They're more expensive, but far lower input lag, and much higher quality in general.
Click to expand...

Thx. Do you have any specific screens from Dell or Philips? What about Philips 43pus6412?
 
mnewsham

mnewsham

Lifer
Oct 2, 2010
14,539
428
136
Hemming404 said:
Thx. Do you have any specific screens from Dell or Philips? What about Philips 43pus6412?
Click to expand...
The Dell p4317q is my preference for currently available 4k panels.

Great monitor. And if you can find it for under $1k it's a great price.
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
mnewsham said:
The Dell p4317q is my preference for currently available 4k panels.

Great monitor. And if you can find it for under $1k it's a great price.
Click to expand...

$980 it seems. I've had Dell monitors for some years now and they have been great. Only thing that's a little annoying is that I need a Displayport cable to run 4K@60Hz because it runs HDMI 1.4. I'll mainly use it for desktop use but also some gaming - can it handle that too? And obviously it has 4:4:4? No other caveats I should worry about?

For reference. I was previously using a Dell u2711 which I was very satisfied with.
 
mnewsham

mnewsham

Lifer
Oct 2, 2010
14,539
428
136
Hemming404 said:
$980 it seems. I've had Dell monitors for some years now and they have been great. Only thing that's a little annoying is that I need a Displayport cable to run 4K@60Hz because it runs HDMI 1.4. I'll mainly use it for desktop use but also some gaming - can it handle that too? And obviously it has 4:4:4? No other caveats I should worry about?
Click to expand...
Only real caveat is that it's now over a year old and there could be a replacment model in the next 6-12 months. But dell is known to wait a few years between generations for larger panel sizes (looking at you Dell U3011/14/17).


It's not really meant for gaming, but assuming you aren't expecting super fast response time, it should be fine, and for games like Civilization or similar, it will be great.
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
mnewsham said:
Only real caveat is that it's now over a year old and there could be a replacment model in the next 6-12 months. But dell is known to wait a few years between generations for larger panel sizes (looking at you Dell U3011/14/17).


It's not really meant for gaming, but assuming you aren't expecting super fast response time, it should be fine, and for games like Civilization or similar, it will be great.
Click to expand...

Thx! It will mainly be Diablo 3.

From reading the initial reviews, it looks like people prefer the new LG 43UD79 over the Dell. I think I'll return the LG TV and look for a 43" monitor instead. I need to read a few more reviews.

I just wish I had thought about getting a monitor instead of a TV when I embarked on this :)
 
mnewsham

mnewsham

Lifer
Oct 2, 2010
14,539
428
136
Hemming404 said:
From reading the initial reviews, it looks like people prefer the new LG 43UD79 over the Dell.
Click to expand...

Yeah i'm not surprised, it's a good year or so newer than the dell, it's also using an LG produced panel so LG themselves SHOULD have access to the highest quality panels from each batch before they offer them up to other monitor manufacturers.

You can't go wrong with it. But as you said, look up reviews, more and more large 4k monitors will be coming out as time goes on.
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
mnewsham said:
Yeah i'm not surprised, it's a good year or so newer than the dell, it's also using an LG produced panel so LG themselves SHOULD have access to the highest quality panels from each batch before they offer them up to other monitor manufacturers.

You can't go wrong with it. But as you said, look up reviews, more and more large 4k monitors will be coming out as time goes on.
Click to expand...

Yep, I would expect it to become much more popular. Interestingly, my company decided to go with three 24" monitors instead of one 40" for our new workstations. But I know that other companies in the same industry are using one 43".

Again, thanks a lot for the input!
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
Looking more into the LG 43UD79, I'm not sure if that also has a RGBW panel. I just can't understand how that would work in a monitor that should be used in an office and applications where you definitely need all colour combinations to be shown nicely.
 
mnewsham

mnewsham

Lifer
Oct 2, 2010
14,539
428
136
Hemming404 said:
Looking more into the LG 43UD79, I'm not sure if that also has a RGBW panel. I just can't understand how that would work in a monitor that should be used in an office and applications where you definitely need all colour combinations to be shown nicely.
Click to expand...

Looking online some people on hard forums have complained it's BGR not RGB, but I can't confirm this.

Also apparently while it is a flicker free panel, this only applies at full brightness, below the max and you'll have PWM flickering, so if you're sensitive to that you'll likely want to stay away.
 
H

Hemming404

Junior Member
Jul 16, 2017
9
0
1
mnewsham said:
Looking online some people on hard forums have complained it's BGR not RGB, but I can't confirm this.

Also apparently while it is a flicker free panel, this only applies at full brightness, below the max and you'll have PWM flickering, so if you're sensitive to that you'll likely want to stay away.
Click to expand...

Where have you seen that? I've read some reviews on amazon but I would like to get more opinions (I also saw people complain about the flickering).
 
WhiteNoise

WhiteNoise

Golden Member
Jun 22, 2016
1,079
188
106
amenx said:
Most likely the issue is in the Nvidia control panel, where you have to manually select RGB mode to "full" rather than 'limited. Also on some TVs (Samsung) you may have to rename the HDMI source to PC mode, which for some odd reason seems to 'fix things'. Not sure if your TV is similar.

edit: missed above post.
Click to expand...

For the best input lag (Samsung KS8500) using PC mode is not the best. input lag in PC mode is around 33ms. HDR content will not work either in this mode. By entering the settings and editing the PC Mode to say "bluray player" the TV enables HDR and input lag drops to 19ms. This while using RGB mode in nvidia settings provides the best picture, clarity for text, HDR when HDR sources are provided and the lowest input lag for the TV.

I'm not sure if this is the case for all Samsungs but it is for mine.
 
You must log in or register to reply here.

TRENDING THREADS

COMPANY
RESOURCES
FOLLOW
Top Bottom