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LG 31MU97 4k Display

Mais78 said:
If you want to get closer to Retina you have to stop at 24" 4k (185 ppi) or get the Dell 27" 5k (same ppi as your MBP).
Click to expand...

Do you mean the Dell UP2715K? Does that even work with a Mac Pro? I can't find a reputable review online. One Amazon review of that display from a few days ago indicates that it doesn't work with a Mac Pro at 5K.

How do you find photo editing? Do all those pixels slow down lightroom?
Click to expand...

Scrolling through 1:1 images from a D700 is a bit jerky, yes, but it's acceptable. Another performance hiccup I noticed a few hours ago is that playing a 25fps 1080i 4:2:2 AVC TS stream in mpv suffered from a bit of frame rate jitter at 3200x1687. It's just the scaler, however; the same video played back nicely at the native 4096x2160 res.

These aren't my primary activities, so I think I can live with switching to native res for the occasional times when I need better GPU performance.
 
dhess said:
Do you mean the Dell UP2715K? Does that even work with a Mac Pro? I can't find a reputable review online. One Amazon review of that display from a few days ago indicates that it doesn't work with a Mac Pro at 5K.



Scrolling through 1:1 images from a D700 is a bit jerky, yes, but it's acceptable. Another performance hiccup I noticed a few hours ago is that playing a 25fps 1080i 4:2:2 AVC TS stream in mpv suffered from a bit of frame rate jitter at 3200x1687. It's just the scaler, however; the same video played back nicely at the native 4096x2160 res.

These aren't my primary activities, so I think I can live with switching to native res for the occasional times when I need better GPU performance.
Click to expand...

Yes that one. Weirdit does not work on Mac Pro, hrdware should be sufficient, i guess Apple has to unlock support.

Is there any lag in the Develop module when you move the sliders until you see the effect?

Thanks
 
Mais78 said:
Is there any lag in the Develop module when you move the sliders until you see the effect?
Click to expand...

It's not scientific, but with an example image from a D200 zoomed in so that the image takes about 80% of the screen (the rest is Lightroom UI), most of the highlights/shadow sliders update nearly instantly. With a sharpen kernel, there's maybe a 1/4 second delay, but that seems perfectly acceptable to me.

However, I suspect that with most of these operations, the performance of the image processing kernels on a given GPU is directly proportional to the number of megapixels in the original photo, and is independent of how much of the image is visible on-screen or the resolution of the display. Operations like highlights/shadow/tone mapping need to process the entire image, not just what's visible. Updating the pixels on screen to reflect the changes made by the operation is probably very quick, compared to the time spent chewing on the contents of the photo.

Zooming and panning the image is what's going to be affected by the display resolution, scaling modes, etc.
 
dhess said:
It's not scientific, but with an example image from a D200 zoomed in so that the image takes about 80% of the screen (the rest is Lightroom UI), most of the highlights/shadow sliders update nearly instantly. With a sharpen kernel, there's maybe a 1/4 second delay, but that seems perfectly acceptable to me.

However, I suspect that with most of these operations, the performance of the image processing kernels on a given GPU is directly proportional to the number of megapixels in the original photo, and is independent of how much of the image is visible on-screen or the resolution of the display. Operations like highlights/shadow/tone mapping need to process the entire image, not just what's visible. Updating the pixels on screen to reflect the changes made by the operation is probably very quick, compared to the time spent chewing on the contents of the photo.

Zooming and panning the image is what's going to be affected by the display resolution, scaling modes, etc.
Click to expand...

Great thanks. Can you remind me your set up? I would be using it with a 2014 Mac Mini 2.6ghz.
 
Mais78 said:
If you want to get closer to Retina you have to stop at 24" 4k (185 ppi) or get the Dell 27" 5k (same ppi as your MBP).
Click to expand...
Mac OS X is unfortunately still only designed for 100ppi or 200ppi retina, and doesn't handle intermediate stages well. So we either need 20" 4K for retina, or 40" 4K for loooaaaads of screen real-estate.
 
Basic75 said:
Mac OS X is unfortunately still only designed for 100ppi or 200ppi retina, and doesn't handle intermediate stages well. So we either need 20" 4K for retina, or 40" 4K for loooaaaads of screen real-estate.
Click to expand...

I guess what you say is true at native resolution? You can use scaled, eg. 24" 4k at 1080 scaled and the monitor will be crisp as retina with same real estate as Full HD
 
Mais78 said:
Great thanks. Can you remind me your set up? I would be using it with a 2014 Mac Mini 2.6ghz.
Click to expand...

I'm on a Mac Pro late 2013 with D700 GPUs, and the performance isn't what I'd call "buttery."

I wouldn't recommend this display with a Mac mini, certainly not if you're planning on using GPU scaling. At the very least, you should verify that the Mac mini can even drive it at native resolution @ 50Hz before you purchase.
 
dhess said:
I'm on a Mac Pro late 2013 with D700 GPUs, and the performance isn't what I'd call "buttery."

I wouldn't recommend this display with a Mac mini, certainly not if you're planning on using GPU scaling. At the very least, you should verify that the Mac mini can even drive it at native resolution @ 50Hz before you purchase.
Click to expand...

I am interested in the Dell UP2414Q. Why not GPU scaling? The Mac Mini can run 4k at 50hz, and 1080 scaled resolution.
 
Finally I got my 31MU97 today.

I am running a new Mac Pro 2013 / 2x D700.
My setup was a Dell U2711 (27" / 2560x1440) next to a Samsung 26" (1920x1200).

It took me several hours to build up the new setting with the 31MU97....
The Dell moved to the right, Samsung left and LG is main screen now in front of me.

I´ve had several problems, some of them unexpected.
In the end I´m finally running 4096x2160 / 50HZ while not sure what scaling to take, yet.
Best for me the 2048x1080 or native.
I had to use the configuration file posted in this thread to get it work ! No "out of the box" ....:confused:
Anyway resolution settings stay - even after restarting.

I want to write a detailed review in German and post it on Amazon. Maybe I´ll translate to English and post on Amazon.com ? Anyway, the most important things I´d like to let you know for now:

1) While full resolution on MacOS is 50Hz (after applying some kind of "fix") I get full 60Hz out of the box on Windows 8.1 Pro / Bootcamp. While second display (1440p) does not always work properly after booting up on MacOS (unplug/replug or restart "solves" the thing) it works absolutely perfect on Bootcamp Windows.

2) Though "uniformity" is activated I am not really satisfied with color homogeneity. The left side seems a bit reddish, the right side a bit greenish to me. Also there is some yellowish color on the lower bottom, as usual.

3) The display seems a bit more dependent on the viewing angle than expected. Especially horizontally.

4) Some games are not as smooth as a player would wish. For example Diablo 3 ROS is not satisfying for me. AC Unity is very smooth then, especially with sharpening function set it looks great even in FullHD. I tested some games on Windows + MacOS and they´re all the same. D3ROS is much smoother on my old Dell on Windows.

5) While MacOS scaling offers not a sharp, crystal clear picture, the LG can fix that to a certain degree with its sharpening feature. I am using it on "middle" and it really improves the clarity. Anyway, scaling on Windows is somehow different. Can´t say if it´s better or not. At least as good as. Nothing gets blown up if the scaling is not higher than 125%. Some elements are way too small then but at least some of the most important fonts can be increased anyway. On higher scaling many elements are blown up and therefore getting unsharp.

Conclusion: More shadows than light. Can not recommend it for now.
 
MrJandali said:
Finally I got my 31MU97 today.

I am running a new Mac Pro 2013 / 2x D700.
My setup was a Dell U2711 (27" / 2560x1440) next to a Samsung 26" (1920x1200).

It took me several hours to build up the new setting with the 31MU97....
The Dell moved to the right, Samsung left and LG is main screen now in front of me.

I´ve had several problems, some of them unexpected.
In the end I´m finally running 4096x2160 / 50HZ while not sure what scaling to take, yet.
Best for me the 2048x1080 or native.
I had to use the configuration file posted in this thread to get it work ! No "out of the box" ....:confused:
Anyway resolution settings stay - even after restarting.

I want to write a detailed review in German and post it on Amazon. Maybe I´ll translate to English and post on Amazon.com ? Anyway, the most important things I´d like to let you know for now:


2) Though "uniformity" is activated I am not really satisfied with color homogeneity. The left side seems a bit reddish, the right side a bit greenish to me. Also there is some yellowish color on the lower bottom, as usual.


Conclusion: More shadows than light. Can not recommend it for now.
Click to expand...

I had the exact same issues with white/color uniformity which was unfortunate.

Left side more contrast/warmer.
LG-Color-Shift3.jpg
 
drecc said:
I've noticed that when I scroll, one half of the screen sometimes scrolls at a different rate than the other half.
Click to expand...

I also see that problem (scrolling / screen updating) at different speed in left and right half of the screen. In my case, it happens each time I wake the screen from standby. I have to power the LG off and on to fix that until next standby cycle.
in addition when the scroll problem appears, I can see a small area of pixels blinking in the center of the screen (must search, will not find it easily), and also in the center of the top area of the screen.
I use hackintosh with GTX760.
In my opinion it is a firmware bug in the LG. Is it possible to update?
 
drecc said:
I've noticed that when I scroll, one half of the screen sometimes scrolls at a different rate than the other half.

I've attached a photo I took of the screen while scrolling. Anyone else seeing this on their LG?

When I switched the screen off and on the issue completely disappeared, so it's not a huge problem.

Maybe this is because the screen is actually 2x panels stitched together, and the firmware in the monitor that is separating the SST stream into a stream per panel is a little bit buggy?

Or maybe it's a buggy GT 750M GPU driver?
Click to expand...

Yes it happened to me. Unplugging cable switching on or off monitor or switching ratio in the monitor menu solves the issue for me. It happen very rarely. I observed it maybe twice. Once happened that whole half of panel became just colour noise. It happen close to wake from sleep it never happened during work. It seems it is bug in firmware.
 
Late 2013 Macbook Pro 13"

Hi peeps,

I've been reading through a lot of threads, I can't find a straight answer to this and wondered if you can help.

Will my Late 2008 MBP 13" run this LG 31MU97 4k Display?

Many thanks,

S
 
larrysing1963 said:
There are no 13" models listed in the Apple 4K Support notes page:

http://support.apple.com/en-us/HT202856
Click to expand...

I've seen that page. This is where my confusion starts, it states:

Supported displays and configuration
You can use 4K displays and Ultra HD TVs with these Mac computers.

  • MacBook Pro (Retina, Late 2013 and later)
Click to expand...

Which is what my Macbook is.

Later in the article it specifically states 15" for 60hz MST. Which is why I need some clarity...
 
steviehype said:
I've seen that page. This is where my confusion starts, it states:



Which is what my Macbook is.

Later in the article it specifically states 15" for 60hz MST. Which is why I need some clarity...
Click to expand...

I believe others have reported that the 2013 13" model can only do 30Hz, not 60Hz.
 
steviehype said:
I've seen that page. This is where my confusion starts, it states:Which is what my Macbook is. Later in the article it specifically states 15" for 60hz MST. Which is why I need some clarity...
Click to expand...

Lots more info here:

http://store.apple.com/us/question/...display-4k-onto-the-monitor/QX4HY7HTKUYTAYFUH

Here is another thread which has lengthy discussions on this issue. This one specifically details a method to get 3840x2160 @ 52Hz, which might be the best option:

https://forums.macrumors.com/threads/1741440/

And another:

https://discussions.apple.com/thread/6753807
 
Last edited:
It works fine for me, 4096 x 2160 @ 60 Hz

MacPro (late 2013), Yosemite 10.10.3

No any 'hacks', just connected the display. It's gorgeous.

AMD FirePro D700:

Chipset Model: AMD FirePro D700
Type: GPU
Bus: PCIe
Slot: Slot-2
PCIe Lane Width: x16
VRAM (Total): 6144 MB
Vendor: ATI (0x1002)
Device ID: 0x6798
Revision ID: 0x0000
ROM Revision: 113-C3861J-687
gMux Version: 4.0.11 [3.2.8]
EFI Driver Version: 01.00.687
Displays:
31MU97:
Resolution: 4096 x 2160 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
LED Cinema Display:
Display Type: LCD
Resolution: 1920 x 1200
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: 2A9200M00K0
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
 
shapa said:
It works fine for me, 4096 x 2160 @ 60 Hz

MacPro (late 2013), Yosemite 10.10.3

No any 'hacks', just connected the display. It's gorgeous.

AMD FirePro D700:

Chipset Model: AMD FirePro D700
Type: GPU
Bus: PCIe
Slot: Slot-2
PCIe Lane Width: x16
VRAM (Total): 6144 MB
Vendor: ATI (0x1002)
Device ID: 0x6798
Revision ID: 0x0000
ROM Revision: 113-C3861J-687
gMux Version: 4.0.11 [3.2.8]
EFI Driver Version: 01.00.687
Displays:
31MU97:
Resolution: 4096 x 2160 @ 60 Hz
Pixel Depth: 32-Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Television: Yes
LED Cinema Display:
Display Type: LCD
Resolution: 1920 x 1200
Pixel Depth: 32-Bit Color (ARGB8888)
Display Serial Number: 2A9200M00K0
Mirror: Off
Online: Yes
Rotation: Supported
Connection Type: DisplayPort
Click to expand...

Very cool. And it must be something they have updated in 10.10.3, because even on the "official" Apple 4K support page dated 12/1/2014, they did not say this monitor could do that. I wonder if it's limited to the Mac Pro?

With OS X Yosemite, you can use all of the above displays as well as the following:

LG 31MU97 4K display (at 30Hz or 50Hz)
Click to expand...
 
Hey guys,
I'm super close to picking one of these up for my mid2014 Macbook Pro 15" and just wanted to hear from those of you powering this thing using a rMBP 15"?

How does the laptop seem to handle the high res?
Does it manage to power the monitor without noticeable strain and overheating?

Im just wanted to make sure I could work effectively in photoshop and illustrator without my computer struggling.

Thankyou,

Henry
 
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