LG 31MU97

ordered!

this will be my 3rd 31-32 4k screens. Both before where sharp based (the sharp pnk321 (100% the same as the asus) and the dell 32" 4k). SCREW MST :)
 
Might not be a big difference but this isn't really. 31" monitor. It's got about a third inch black bar all around the panel inside the bezel so I think it's really better categorized as a 30" display. With a tape measure I think it cane out to something like 30.25" diagonal. Compared to a 32" display it does look noticeably smaller, also since its a narrower panel it doesn't fill your view quiet like a 16:9 display. More space for soda bottles I guess lol.

I'm tempted to keep the monitor my main issues are the white background buzzing (which I could probably engineer a fix for) and the aspect ratio being locked in so "esport" games intentionally with the preference for 16:9 and some games like witcher 2, evil within, mass effect series, etc just not having support at all. It means basically hoping support is better in the future or just keeping this display for a year or so until better ones come out.
 
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Buydig has this in stock now, tempting to ask a refund from the ebay seller so I can order one from buydig
 
Might not be a big difference but this isn't really. 31" monitor. It's got about a third inch black bar all around the panel inside the bezel so I think it's really better categorized as a 30" display. With a tape measure I think it cane out to something like 30.25" diagonal. Compared to a 32" display it does look noticeably smaller, also since its a narrower panel it doesn't fill your view quiet like a 16:9 display. More space for soda bottles I guess lol.

I'm tempted to keep the monitor my main issues are the white background buzzing (which I could probably engineer a fix for) and the aspect ratio being locked in so "esport" games intentionally with the preference for 16:9 and some games like witcher 2, evil within, mass effect series, etc just not having support at all. It means basically hoping support is better in the future or just keeping this display for a year or so until better ones come out.

You try using flawless widescreen for those games? May fix the aspect ratio.
 
You try using flawless widescreen for those games? May fix the aspect ratio.

Nope i will try that when I go back home tonight. ive only been using Windows fullscreen windowed app. Although looking online it seems some people are saying flawless widescreen app doesnt fix witcher 2 for 2.35:1 I'll see if it works for 17:9.
 
Are the pixels square on this thing? i.e. at 4096x2160, the aspect ratio is slightly wider than 16:9?
 
Are the pixels square on this thing? i.e. at 4096x2160, the aspect ratio is slightly wider than 16:9?

Yes, it's roughly a 17:9 monitor.

You can safely assume that any modern display has square pixels.
 
You try using flawless widescreen for those games? May fix the aspect ratio.

It's a pretty nice program, better than Windows Borderless Gaming App. It fixed Witcher 2 and Mass Effect 3. Well not really, cutscenes, menus, and other overlays are still 16:9 and you get blacks or borked cinematics, but otherwise regular gameplay is 17:9. Some games still had no fix but those are the ones fixed to render internally at 16:9 so everybody gets black bars unless you have a 16:9 monitor.

It's a nice monitor I think I'll keep and it return the Samsung UD970 actually...the thread here about dead pixels made me realize I didn't want to spend $2200 on a flawed display and after going through 3 different panels its pretty obvious Samsung's 4K PLS production process is not as mature as LG's IPS process, or they think its okay to charge $2k and not bother binning the best panels. Either way it's kinda lame.

Downside is I can't play games at launch anymore and have to wait until modders release widescreen patches. Meh.
 
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Owners, please check for LED PWM Dimming with this test at 0% & 50% brightness. Make sure Windows Aero is enabled. If multiple lines are visible instead of one blurred line, the monitor use PWM/Flicker (Read about the side effects) like the Samsung 4K monitor and 32" 4K Sharp panels used by Asus, Dell and Sharp. I asked LG to send me on to review, but I doubt they will even reply.

Could someone please do the above?

It only takes a few seconds, and it helps out a lot of potential buyers.
 
It looks like a really fat blurred line, when I take a photo on my iphone I see three lines. So that must be pwm? Besides what monitor would use CCFL these days, isn't everything PWM?
 
It looks like a really fat blurred line, when I take a photo on my iphone I see three lines. So that must be pwm? Besides what monitor would use CCFL these days, isn't everything PWM?

Nah, PWM is a dimming technique which cycles the backlight constantly to control brightness causing flicker. By contrast, monitor manufacturers could use Direct Current (DC); DC is a dimming technique which keeps the monitor uniformly bright, flicker free.

There's also different varying levels of PWM. Some monitor manufacturers use PWM with incredibly high rates of flicker (17khz+), that of which are impossible to perceive, and won't actually cause eye-strain. But, it's common to see sub 200hz PWM, which is easily perceivable to cameras and the testufo site; this is the stuff that'll really strain your eyes.

A picture of the test is actually irrelevant, all the matters is what you see with regular eye tracking on that particular test. I'd say it doesn't use PWM if there's only one line.

Oh, and thank you for testing!
 
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So, here are some initial first impressions:

Pros:
1. I really like the 4096x2160 resolution. I was worried I might not like it, but it gives you just a bit of extra room over UHD.
2. This monitor is SST, so it reports just like any other display to Windows. Displayport 1.2 is enabled by default.
3. The colors are great, and the display comes with a factory calibration test report.
4. The stand is well built and provides for portrait and landscape modes.
5. I don't hear any whine from the monitor.
6. It appears to scale well when set to non-native resolutions.
7. 3840x2160 @ 60Hz works great.
8. 31" is large enough that I can use the display without any scaling enabled. Though I may bump up to125%.
9. Response time is OK (tested in BF4). I will have to play more to really be able to give valid feedback. I have the settings configured for the fastest response time right now.
10. No external power brick...I don't mind one way or the other..but having everything integrated is a plus overall.
11. VESA mount compatible.

Negatives:
1. I am currently running NVidia 670 SLI , and max out at 50Hz @ 4096x2160. I tried making a custom config, but it won't work. I am currently going through the mini-displayport to display port cable that the display came with. I will try a full size display port connector next week, to see if it makes a difference.

2. The screws on the back of the stand that attach to the mount did not screw in very tightly.

3. TBD how games support 4096x2160, I have to run BF4 in borderless mode. Otherwise it kept switching into a window. I do not have this problem at 3840x2160. The display still looks pretty good at 3840x2160, so that is still an option.

Is this the 4k monitor to have? do we have cheaper alternatives with true 4k@60Hz/ non-TN?
I have a Seiki 39",that do not use anymore, since over the last 2 months it started losing signal and making terrible noise while self-resetting. I won't be back to Seiki anytime soon: their board is THAT bad. I am typing on my 2007 Apple 30", which is still working flawlessly, while the Seiki went kaputt less than year after purchase...:mad:
 
Negatives:
I am currently going through the mini-displayport to display port cable that the display came with. I will try a full size display port connector next week, to see if it makes a difference. .

I am unable to have it work via normal DP port. Mini yes.. very odd.
I have two other 4k monitors that didn't have a problem.
doesn't even show up in POST. (turning off 1.2 DP does work.. but 30hz is worthless :) )
 
I am unable to have it work via normal DP port. Mini yes.. very odd.
I have two other 4k monitors that didn't have a problem.
doesn't even show up in POST. (turning off 1.2 DP does work.. but 30hz is worthless :) )

So, I tried a full size DP cable that I got off Amazon. I had no issues running at UHD 4K @ 60 Hz. However, when pushing real 4k I noticed some display artifacts. This resolution is basically pushing the limits of DP 1.2. As such, it is very important to utlize a fully VESA certified cable.

I am currently back to using the DP cable that came with the monitor.
 
Nah, PWM is a dimming technique which cycles the backlight constantly to control brightness causing flicker. By contrast, monitor manufacturers could use Direct Current (DC); DC is a dimming technique which keeps the monitor uniformly bright, flicker free.

There's also different varying levels of PWM. Some monitor manufacturers use PWM with incredibly high rates of flicker (17khz+), that of which are impossible to perceive, and won't actually cause eye-strain. But, it's common to see sub 200hz PWM, which is easily perceivable to cameras and the testufo site; this is the stuff that'll really strain your eyes.

A picture of the test is actually irrelevant, all the matters is what you see with regular eye tracking on that particular test. I'd say it doesn't use PWM if there's only one line.

Oh, and thank you for testing!

@Nikyo and @dragonageinquisition

Multiple line on the camera picture does indicate PWM. It means the back light switched on and off that many times during the exposure. The number of lines you see on that picture divided by the shutter speed is a very rough estimate of the PWM frequency.

Quoted from the test page "...may reveal PWM effect of multiple separate vertical lines..."
 
@Nikyo and @dragonageinquisition

Multiple line on the camera picture does indicate PWM. It means the back light switched on and off that many times during the exposure. The number of lines you see on that picture divided by the shutter speed is a very rough estimate of the PWM frequency.

Quoted from the test page "...may reveal PWM effect of multiple separate vertical lines..."

Yes, but it'll show up with regular eye-tracking (that's the intention of the test). If I turn down my EV2336 below 20% I can see multiple vertical lines from the test without a camera, above 20% it's one blurred line. Horizontal lines showing up with a camera would indicate PWM.

Like in this video: http://www.youtube.com/watch?v=p6ygxbvUcRc

More verifications wouldn't hurt either, if you own this monitor please take 5-10 seconds to check!
 
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Both panels have Overdrive so you can't compare them directly and I don't really have the expertise to compare this sort of thing. But I do think the LG has a better panel, it just seems a lot clearer the images, whereas the Samsung being semi glossy makes it a little blurrier. Also the one LG I got either hit the panel lottery or something because there are no dead pixels. I'm on my third Samsung UD970 replacement and each one has at least 2-3 dead pixels. Kind of disappointing for a much more expensive panel.

Not to beat a dead horse but could you be so kind as to explain in more detail the differences between the anti-glare used on the two monitors. Basically what I am getting at is that I have recently gotten the UD970 and am very pleased with it for the most part. The only thing that bothers me a bit about it is the slight grain on the screen. I was hoping for something a little lighter. I got a really good deal on the UD970 from the person selling it and cannot justify returning it, especially since there is nothing wrong with it at all however I am on the fence about selling it for the LG if it really is that much clearer. If the difference is not that big then it is probably not worth the hassle. Unfortunately I don't have any stores nearby that sell the LG so I can see it in person so any further insight into the anti glare the LG uses would be very helpful. I assumed that this panel would use the same LG coating the many of its other ones use, 3H, but I see it listed as "advanced anti-glare". Curious as to what is advanced about it? Anyways, any further info would be very helpful, thank you.
 
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So after having the 34UM95 for about six months I just picked up this monitor today from Micro Center. Holy crap the difference is amazing. Where the 95 looked kind of pixelated, and always gave me issues with green lines in places at times, this monitor is crystal clear. Can't see any pixels and it looks incredible.
 
Yes, but it'll show up with regular eye-tracking (that's the intention of the test). If I turn down my EV2336 below 20% I can see multiple vertical lines from the test without a camera, above 20% it's one blurred line. Horizontal lines showing up with a camera would indicate PWM.

Like in this video: http://www.youtube.com/watch?v=p6ygxbvUcRc

More verifications wouldn't hurt either, if you own this monitor please take 5-10 seconds to check!

To further reinforce my point, my EV2336 is calibrated to a brightness of 120 cd/m2 putting it in a state of Direct Current. If I now take my phone and look at the TestUFO site there's multiple lines that of which are absent with regular eye tracking; these lines are obviously not from PWM, but are instead just a result of the camera being unable to keep up with the speed of the line.

So again, let me reiterate: when using this test, do not look at it with your camera, but rather with just your eyes.

A single blurred line = good; no PWM

Multiple sporadic lines appearing at once in close proximity to each other = bad; PWM
 
How's the color uniformity? (I know it varies from unit to unit but I want a general idea before purchasing).
 
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Not to beat a dead horse but could you be so kind as to explain in more detail the differences between the anti-glare used on the two monitors. Basically what I am getting at is that I have recently gotten the UD970 and am very pleased with it for the most part. The only thing that bothers me a bit about it is the slight grain on the screen. I was hoping for something a little lighter. I got a really good deal on the UD970 from the person selling it and cannot justify returning it, especially since there is nothing wrong with it at all however I am on the fence about selling it for the LG if it really is that much clearer. If the difference is not that big then it is probably not worth the hassle. Unfortunately I don't have any stores nearby that sell the LG so I can see it in person so any further insight into the anti glare the LG uses would be very helpful. I assumed that this panel would use the same LG coating the many of its other ones use, 3H, but I see it listed as "advanced anti-glare". Curious as to what is advanced about it? Anyways, any further info would be very helpful, thank you.

The UD970 I guess is a matte type with slight grain. LG 31MU97 is grain-free matte, which I've heard some reviewers call "semi-glossy." It's very clear and has none of the graininess of the Samsung display. However it does have worst contrast than the UD970 and has more color banding.

For desktop usage IMO the LG blows the Samsung away. For gaming the Samsung wins just because it's 16:9. It takes too many bandaids to really game effectively on the LG. I might return both the LG and the Samsung and wait for the Eizo FlexScan EV3237FX. I can't really game on the LG because I play mostly RPGs and playing 17:9 destroys the immersion of the cinematics which are all 16:9 which no widescreen mod can fix because these are hard-coded aspect ratios. I'm really hoping to game Witcher 3 and Dragon Age Inquisition at 4K and that's just not going to happen with the LG, and since it's gonna fail its primary purpose I don't really have much use for it. I can't deal with the Samsung because their panels are all garbage with too many dead pixels. Hopefully Eizo bins their panels so I don't have to deal with dead pixels.
 
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To further reinforce my point, my EV2336 is calibrated to a brightness of 120 cd/m2 putting it in a state of Direct Current. If I now take my phone and look at the TestUFO site there's multiple lines that of which are absent with regular eye tracking; these lines are obviously not from PWM, but are instead just a result of the camera being unable to keep up with the speed of the line.

So again, let me reiterate: when using this test, do not look at it with your camera, but rather with just your eyes.

A single blurred line = good; no PWM

Multiple sporadic lines appearing at once in close proximity to each other = bad; PWM

I'm not arguing against your point exactly. Just because our eyes can't see multiple lines doesn't mean PWM isn't present. A camera is much more objective than our eye balls. If the picture is taken at 1/30s shutter speed for example, and it records 5 vertical lines, our eyes may not be able to see the vertical lines but the picture shows PWM is present and gives you a rough estimate of the frequency.
 
The UD970 I guess is a matte type with slight grain. LG 31MU97 is grain-free matte, which I've heard some reviewers call "semi-glossy." It's very clear and has none of the graininess of the Samsung display. However it does have worst contrast than the UD970 and has more color banding.

Could you give an impression of the IPS glow?

Also, when you did the PWM test yesterday, what % brightness were you using?

I'm not arguing against your point exactly. Just because our eyes can't see multiple lines doesn't mean PWM isn't present. A camera is much more objective than our eye balls. If the picture is taken at 1/30s shutter speed for example, and it records 5 vertical lines, our eyes may not be able to see the vertical lines but the picture shows PWM is present and gives you a rough estimate of the frequency.

Actually, that's incorrect; NCX even points out that the TestUFO site detects PWM where the camera technique misses it: http://wecravegamestoo.com/forums/m...40-semi-glossy-8-bit-frc-pls.html#post1292908

Also, the camera technique does not apply to the TestUFO site at all as it's a completely different method. The TestUFO uses quick vertical lines in order to detect PWM, whereas the camera technique would show multiple horizontal lines going up and down the screen.

As I said earlier, the entire point of the TestUFO is to detect it with eye tracking only.

edit: I actually think there's a bit of a misunderstanding too; when dragonageinquisition used his camera, he was referring to seeing multiple vertical lines going across the screen, which as I explained, is just a result of the camera not being able to keep up with the fast speed of the lines on TestUFO. He's not seeing the aforementioned horizontal lines from use of the camera technique.
 
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Hmm? There is no such thing as camera only and eye only PWM test. All you need is a camera with adjustable shutter speed (the camera has to be set up properly to match an ISO, aperture, correct focus and shutter speed to capture that particular frequency [testing needs to be done]):

http://www.tftcentral.co.uk/articles/pulse_width_modulation.htm

The traditional way is a solid non-moving vertical white line and moving the camera horizontal over the line during exposure. The testUFO site is better because it moves the line automatically, you keep the camera still during exposure. This is preferable as it's a much easier method, and also has the side effect of being able to be detected by the naked eye if it's low frequency PWM. Something that isn't possible with a stationary white line.

If the camera is showing a split vertical line during the testUFO at 20% brightness and below, it means the display uses PWM at 20% brightness and below. No camera characteristic will make a solid line split into multiple thinner lines. That's only PWM. If the camera is set up wrong, or there actually is no PWM, the line will be one continuous blur.

So if other people can confirm the use of PWM (at least 20% brightness and below which is common), that would be great. A lot of monitors use PWM at only 20% brightness and below, but I still won't buy them as I like to turn my brightness way down at night sometimes.

Also notice that LG does not advertise this monitor as having a flicker free back-light. I know of no manufacturer that has a flicker free back-light and doesn't advertise it as such. It's a huge selling point. Bummer.

Here is an example:

http://www.lg.com/hk_en/monitors/lg-D2792P
 
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Here's what it looks on my phone at 25% brightness. It looks the same at 100% brightness.

UPPOA9F.jpg
 
tZ3VndW.png


Instructions: track your eyes on the moving line

I don't understand why NCX wouldn't post a picture using the PWM test on TestUFO then. It's clear by in the review that PWM can't be seen @ 29-15% brightness using the camera method.

Considering I can totally see 4 moving lines on my EV2336W below 20% brightness with just my eyes (It uses 200hz PWM below 20%), I kind of think eye tracking works and that was the intended idea? I mean, I wouldn't understand why he'd tell people to use the test then, majority of the people in this thread are totally clueless about PWM; that's to say, I wouldn't think he'd tell people to do the test without giving illicit instructions.


vOgR7B9.png

edit: I guess it's flicker-free then, or at least it says so on the hungarian site: http://www.lg.com/hu/monitorok/lg-3...l-specifications?country=http://www.lg.com/hu

PCmonitors had also reported it flicker-free in September: https://pcmonitors.info/lg/lg-31mu97-digital-cinema-4k-model/

edit2: @dragonageinquisition

I get the same result as you; above 20% brightness, using every possible shutter on my god-awful phone camera.
 
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@Nikyo I see what you mean now.

I just sent Mark Rejhon an email to be absolutely sure.

But, now we've got this super cool confirmation!

Regarding PWM...the box the display comes in also lists "Flicker Safe" as a feature.

Thanks for checking, buddy. :)

edit: Mark just responded. If you happen to be reading this thread, thanks so much!

To9zl4y.png
 
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So the display is advertised as flicker free? That'd good to know. Back on my possible buy list. ;)
 
Is it possible to try these few games?

- Assassin's Creed 4 Black Flag

- Battlefield 4

- Far Cry 3

- Metro Last Light


If you have any other games not listed, I'm interested in knowing as well!

Just tested Assassin's Creed 4 BF it is 16:9 only, I assume Unity will be the same. So you'll have to wait a bit until the community creates a widescreen patch for the game. Of course the problem with this is every time the game gets patched it'll generally break the mods too. Right now flawless widescreen app fixes AC4 BF but I didn't follow how it was like during release. I assume it took a while to get a fix and had to be re-fixed repeatedly, just like they are trying to keep fixes the flawless widescreen app right now for Evil Within, and the game's been out for 2 weeks already.

If you get this monitor I guess you'll have to learn patience, no more launch gaming. On the flip side this might be good since it usually takes a while to patch a game.

Also, pretty much no competitive gaming. Widescreen mods will get you banned in most online games. So its get a 16:9 monitor or just play single player games.
 
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tZ3VndW.png


Instructions: track your eyes on the moving line

I can't say I understand why NCX wouldn't post a picture using of the PWM test on TestUFO then. It's clear by in the review that PWM can't be seen from the picture he provided @ 29-15% brightness using the camera method.

The pictures I provide in my review are from using TFT Central's method. TFT Centrals method seems to have a threshold (>?hz=non-detectable PWM), but the Samsung S27D850T is the only monitor I've had issues with.

Not all of the LG specification pages indicate that it is Flicker Free/Safe, which leads me to expect a PWM lottery like Samsung's highest end monitors (S27B970D), though the 970D is not marketed as a Flicker Free/Safe monitor.
 
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The pictures I provide in my review are from using TFT Central's method. TFT Centrals method seems to have a threshold (>?hz=non-detectable PWM), but the Samsung S27D850T is the only monitor I've had issues with.

Not all of the LG specification pages indicate that it is Flicker Free/Safe, which leads me to expect a PWM lottery like Samsung's highest end monitors (S27B970D), though the 970D is not marketed as a Flicker Free/Safe monitor.

I understand that, I was saying I don't understand why you wouldn't post a picture using the TestUFO method unless said method was meant for eye-tracking. A quick email to Mark, and apparently I'm only partially right; rather, I wasn't actually questioning what you did so much as I was trying to reinforce my point.

I also don't think it's a fair assumption that there's a panel lottery. I think a better assumption would be that there's incredibly inconsistent translations among product pages, and given that it's branded "flicker-safe" on the actual box in English, then I'd say it's probably a safe assumption that it is indeed PWM-free. That being said, an example would be Eizo's product page; in Japanese, the CX271 and CG277 are branded as having 18khz PWM where the English page is fairly incoherent babble about how Eizo is using PWM to prevent eyestrain. I believe when TFTcentral even reported that the CX271 and CG277 were coming out, they assumed it would be using a hybrid-PWM solution like the Flexscan series. Granted, that's probably a stupid assumption given that the rest of the CX and CG line use high PWM, but I can see where they'd get the idea.

Regardless, more people in the thread should test for PWM. It takes all of 5-10 seconds and would put all the worries to rest. So please, everyone check out this test
 
I understand that, I was saying I don't understand why you wouldn't post a picture using the TestUFO method unless said method was meant for eye-tracking.

I do not have a valid reason for not taking pictures...aside from wanting to get back to shopping for Tommy Bahama Hawaiian shirts.

also don't think it's a fair assumption that there's a panel lottery.

It might not be fair, but I always assume the worst to avoid being surprised and/or disappointed.

----------

Spyder's can not accurately measure black depth, and are less accurate than x-rite's similarly priced colorimeters.
 
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For desktop usage IMO the LG blows the Samsung away. For gaming the Samsung wins just because it's 16:9. It takes too many bandaids to really game effectively on the LG. I can't really game on the LG because I play mostly RPGs and playing 17:9 destroys the immersion of the cinematics which are all 16:9 which no widescreen mod can fix because these are hard-coded aspect ratios. I'm really hoping to game Witcher 3 and Dragon Age Inquisition at 4K and that's just not going to happen with the LG, and since it's gonna fail its primary purpose I don't really have much use for it.

Are you saying this monitor really won't be good for gaming even if we wanted to modd it to get it working properly? Koz I have ordered this monitor, and I intend to play those games too, and I am mainly a gamer on my comp.


If you get this monitor I guess you'll have to learn patience, no more launch gaming. On the flip side this might be good since it usually takes a while to patch a game.

Also, pretty much no competitive gaming. Widescreen mods will get you banned in most online games. So its get a 16:9 monitor or just play single player games.

Well I do alot of starcraft 2 laddering, will I be screwed if I get this monitor?
 
the monitor is fine for gaming. the blur stuff is minor. everything is a trade off. Personally, I care a lot more about PQ than minor blur and tearing. It is different for others.
the monitors scales fine (either via the monitor or gpu scaling to 3840x2160).
If you are looking for a 30+ 4k monitor - i'd suggest this is it. (your only other options now are the sharp based screens - which are fine. But the MST seems to slow down perf a bit. Also, what is the point of 4k and a smaller screen :) )
The build quality if great. the sharp/asus felt cheap. the dell... ugh .. the dell.. so many problems. :) but had better build quality. but dell doesn't give a shit and the screen needs a firmware upgrade that is never going to happen.
Yes, own the sharp pnk321 (asus is just a rebadge of it) and the dell UP3214Q. (4 titans and 4 980s too).
 
the monitor is fine in 3840x2160. Don't let the crazies get to you.
1) the very small stretch is super minor
2) a lot of games will still use the native rez
3) don't scale and have some small black bars. (pixel to pixel mapping)
What might be a problem is losing the mouse on a big screen + 4k. I never had much of a problem with this with 30+ and 2560x1600.. but going to 4k i found myself losing the mouse on the screen for a sec.
That said, for SC and D3 bliz made the mouse icon bigger a while ago which helped a lot.

You can also play at a lower rez too.
 
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