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Reviewed on Dec 19, 2018 , Eric Bousquet, Yannick Khong

LG 34WK95U-W
MONITOR REVIEW

Usage Ratings - Version 1.0

Test Benches:

  • 1.0: Fall 2017
7.7
Mixed Usage
Score components:
7.8
6.8
HDR Gaming
Size : 34 "
Resolution : 5120x2160
Refresh Rate : 60 Hz
LCD Type
What it is: Type of LCD technology used by the monitor.
When it matters: Different technologies have different viewing angle properties.
:
IPS
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
No

The LG 34WK95U-W is a good 5k IPS LED monitor with good picture quality. It can get very bright in SDR and it can also display HDR content decently, but unfortunately, when viewed in dark room, blacks will look grayish due to the mediocre contrast ratio and the bad local dimming. It has a large size screen and excellent resolution. It has a low input lag that makes it very responsive to your actions but it is not flicker-free and does not support any variable refresh rate implementation to please serious gamers.

Test Results
Design 7.5
Picture Quality 7.5
Motion 6.8
Inputs 9.1
Pros
  • Large size and high resolution
  • Image remains accurate at an angle
Cons
  • Poor dark scene performance
  • Bad ergonomics
Update 1/21/2019: The Picture mode was incorrectly written as 'User' instead of 'Custom'

Check Price

7.5

Design

Score components: Subjectively assigned
Curved : No
Curve radius : N/A
Weight (without stand)
What it is: The weight of the monitor when mounted. This is with the stand removed, and if necessary any VESA mounting bracket attached.
When it matters: When choosing a mount for a monitor/
:
16.7 lbs (7.6 kg)
Weight (with stand)
What it is: The weight of the monitor including the stand any any input covers.
:
19.8 lbs (9.0 kg)

The design of the LG 34WK95U is good and is very similar to the LG 27UK650 and other LG monitors. It has a sturdy stand that supports it well and a clean back. Unfortunately, the ergonomics are poor and positioning it to your liking will take some time. The build quality is good without any gaps or loose ends and you should have no issues with this monitor.

Stand
Width
What it is: The width of the stand.
When it matters: When using a small desk, for those who require a monitor with a small footprint.
:
17.6" (44.7 cm)
Depth
What it is: The depth of the stand.
When it matters: When using a small desk, for those who require a monitor with a small footprint.
:
9.2" (23.4 cm)

The stand of the 34WK95U supports the monitor well. The base is metal while the rest is plastic. It is very similar to the LG 27UK650.

4.5 Ergonomics
What it is: How much the position of the screen can be adjusted to match the viewing preference of the user.
When it matters: All usages, but especially office and gaming use.
Score components:
  • 46% Height Adjustment
  • 18% Switch portrait/landscape
  • 18% Swivel Range
  • 18% Tilt Range
Height Adjustment
What it is: The amount of vertical travel or adjustment of the display.
:
4.3" (10.9 cm)
Switch portrait/landscape : No
Swivel Range : N/A
Tilt Range : -17.5° to 5°

Poor ergonomics for this LG monitor. The tilt range is good but the height adjustment is just decent and there is no option to swivel or rotate. If you make frequent adjustments, you are better off VESA mounting it.

Back
Wall Mount : VESA 100x100

The back of the monitor is plain with a uniform glossy white finish. A small loop attached to the main pole helps with cable management. It is almost identical to the LG 27UK650.

Borders
Borders
What it is: The distance from the left edge of the display to the start of the image.
When it matters: When using multiple monitors side-by-side.
:
0.5" (1.3 cm)

The borders are of average thickness but they look elegant due to the large size of the monitor.

Thickness
Thickness (with stand)
What it is: How far the front of the screen protrudes when placed as far back as possible against a wall.
When it matters: When the monitor is placed back against a wall.
:
6.6" (16.8 cm)
Thickness (without stand)
What it is: How far the front of the screen protrudes when the stand has been removed. For monitors which require a bracket to VESA mount this measurement includes the thickness of the bracket.
When it matters: When mounting a monitor with the stand removed.
:
2.2" (5.6 cm)

The monitor has an average thickness both when mounted on its stand, and when measured without it.

7.5 Build Quality
What it is: How well built and sturdy the monitor is, and how good the materials used to build it are.
When it matters: All usages.
Score components: Subjectively assigned

The build quality of the LG 34WK95U is good. It has a more premium feel than most of its LG peers due to the metal feet. You should have no issues with the build quality of this monitor.

The LG 34WK95U-W has a good picture quality. As expected from an IPS panel, the native contrast ratio is only mediocre and unfortunately, the poor local dimming cannot help improve blacks. On the bright side, the monitor has great SDR peak brightness and can display HDR content decently. It has good viewing angles, excellent gray uniformity and the out of the box color accuracy is very good. When it comes to HDR performance the monitor can display rich saturated colors but the brightness level is not enough to deliver the creators intent in HDR movies. 

6.3 Contrast
What it is: Brightness difference between white and black. This is the main component of picture quality.
When it matters: Always, but especially when watching dark scenes.
Score components:
Native Contrast
What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
1184 : 1
Contrast with local dimming
What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
1193 : 1

The LG 34WK95U-W has a mediocre contrast ratio and cannot display deep blacks just like the rest of IPS monitors we have tested. The monitor is edge-lit (from the top) and when the local dimming feature is enabled, it doesn't raise the contrast ratio on our test picture.

1.5 Local Dimming
What it is: The lights behind the LCD layer adapt to the picture displayed, improving the contrast ratio.
When it matters: Dark scenes viewed in a dark room.
Score components: Subjectively assigned
Local Dimming
What it is: Whether it has a feature that controls the LEDs behind the LCD layer, to match the picture and darkens the dark portion of it.
When it matters: On LED TVs only. Dark scenes viewed in a dark room.
:
Yes
Backlight
What it is: Configuration of the lights of the backlight.
When it matters: Effectiveness of the local dimming.
Good value: Full-array/direct lighting is better for local dimming. As for the uniformity of the screen, it depends on the implementation. Some edge-lit monitors have more uniform blacks than some full-array monitors.
:
Edge

The monitor has a local dimming feature that works both in SDR and in HDR modes. Unfortunately, it cannot always help blacks look deeper since the monitor is edge-lit and thus the local dimming zones are vertical bands. This causes blooming in the entire band when only a small portion of the screen needs to be bright, like in the case of subtitles. This is very similar to the Dell U3219Q.

8.0 SDR Peak Brightness
What it is: How bright the screen can get. Measured with local dimming and with SDR content.
When it matters: Bright living rooms; bright objects; SDR content.
SDR Real Scene
What it is: The maximum luminosity the monitor can obtain while playing a movie or while watching a TV show. Our Real Scene was selected to represent a more regular movie condition. All measurements are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming on, max backlight and with an SDR signal. Scene: here.
When it matters: When watching movies and TV shows in SDR.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
384 cd/m²
SDR Peak 2% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, present on screen for a short time
:
246 cd/m²
SDR Peak 10% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, present on screen for a short time
:
358 cd/m²
SDR Peak 25% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
391 cd/m²
SDR Peak 50% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
393 cd/m²
SDR Peak 100% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
395 cd/m²
SDR Sustained 2% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, persistent during a scene.
:
245 cd/m²
SDR Sustained 10% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, persistent during a scene.
:
358 cd/m²
SDR Sustained 25% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
391 cd/m²
SDR Sustained 50% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
393 cd/m²
SDR Sustained 100% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
394 cd/m²
SDR ABL
What it is: The standard deviation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
:
0.000

Settings tested: Custom-Calibrated

The LG 34WK85U has great SDR peak brightness. It has the best peak brightness from the LG monitors we've tested so far. It can fight bright room glare and it will do great in bright office.

Update 01/21/2019:The SDR peak brightness was retested with the local dimming turned on.

6.8 HDR Peak Brightness
What it is: How bright the screen can get. Measured with local dimming and with HDR content.
When it matters: HDR content
HDR Real Scene
What it is: The maximum luminosity the monitor can obtain while playing a movie or while watching a TV show. This scene was selected to represent a more realistic movie condition. All measurements are made with the monitor set to be as bright as possible, but with a 6500k white. Measured with local dimming, max backlight and over HDR signal. Scene: here.
When it matters: When watching movies or watching TV show in HDR.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
406 cd/m²
HDR Peak 2% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
271 cd/m²
HDR Peak 10% Window
What it is: TThe maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright objects, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
395 cd/m²
HDR Peak 25% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms; bright objects in HDR video.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
423 cd/m²
HDR Peak 50% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
424 cd/m²
HDR Peak 100% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
655 cd/m²
HDR Sustained 2% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
269 cd/m²
HDR Sustained 10% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
393 cd/m²
HDR Sustained 25% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
421 cd/m²
HDR Sustained 50% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
423 cd/m²
HDR Sustained 100% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
421 cd/m²
HDR ABL
What it is: The coefficient of variation of the HDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: HDR content with large bright areas, such as HDR gaming
Good value: <0.07
Noticeable difference: 0.01
:
0.029

Settings tested: Custom-Calibrated

Decent HDR Peak brightness for the LG 34WK95U. The brightness level is good for most HDR games but unfortunately, it is not enough to deliver the creators intent when it comes to HDR Movies.
When the monitor switches from a scene with medium brightness to a bright scene that covers almost the entire screen, the initially observed brightness is above 600 cd²/m. This makes the screen look very bright for the first few seconds but after that, it returns to normal levels. This behavior is normal.

6.9 Horizontal Viewing Angle
What it is: Color accuracy when viewed from the side.
Color Shift from Left
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left
Good value: > 50°
Noticeable difference: 10°
:
32 °
Color Shift from Right
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right
Good value: > 50°
Noticeable difference: 10°
:
32 °
Brightness from Left
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left.
Good value: > 50°
Noticeable difference: 10°
:
42 °
Brightness from Right
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
42 °
Black Level from Left
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
75 °
Black Level from Right
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
75 °
Curve Radius : N/A

Decent horizontal viewing angles. Just like the Dell U3219Q, black levels remain constant no matter the angle at which you look at the monitor. However, you will notice the loss of color accuracy and the diminish in brightness as the angle gets closer to 40°.

8.1 Vertical Viewing Angle
What it is: Color accuracy when viewed from the top or bottom.
Color Shift from Below
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
25 °
Color Shift from Above
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor when standing up.
Good value: > 50°
Noticeable difference: 10°
:
26 °
Brightness from Below
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
35 °
Brightness from Above
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
36 °
Black Level from Below
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
75 °
Black Level from Above
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
75 °

Great vertical viewing angles on the LG 34WK95U-W. The image remains accurate up until 25° at which point colors start to shift. At about 35° the image has lost half of its brightness. This behavior is very similar to the Dell U3219Q.

8.7 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
50% Std. Dev.
What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
3.203 %
50% DSE
What it is: Dirty Screen Effect. High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Solid colors. Sports, panning shots.
Good value: < 0.165%
Noticeable difference: 0.025%
:
0.107 %
5% Std. Dev.
What it is: Average squared difference of pixels when displaying a mid 5% gray.
When it matters: Dark scenes.
Good value: < 1.15%
Noticeable difference: 1%
:
0.366 %
5% DSE
What it is: Dirty Screen Effect. High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.058 %

The gray uniformity of the LG 34WK95U-W is excellent. The sides do look a little darker but it is only slightly noticeable in normal use. There is almost no visible dirty screen effect, and you should not have any issues while you browse the web or when you decide to watch a hockey game on your monitor.

In the darker shades the uniformity is even better as it becomes very hard to spot any uniformity issues or any dirty screen effect. Very similar to the Dell U3219Q.

The monitor has a Uniformity option (only available in Custom and sRGB modes) that we recommend leaving it off as it reduces the overall brightness.

4.6 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
Native Std. Dev.
What it is: Average of the squared difference of the blacks.
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
1.903 %
Std. Dev. w/ L.D.
What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
6.029 %

Poor black uniformity on the 34WK95U as we can see a lot of clouding around the screen. Backlight bleed is evident in the edges and in the lower left corner of the monitor. Unfortunately, when local dimming is enabled, there is still significant clouding in the vertical band where the test cross is due to the vertical local dimming zones.

This monitors issues with black uniformity are not noticeable in normal use. They are deliberately exaggerated here for the purposes of our test.

8.2 Pre Calibration
What it is: Monitor's color accuracy before a full calibration. The measurements are taken with out of the box 'factory setting'.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
Picture Mode
What it is: The picture mode that was used to do the pre-calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
sRGB
Luminance
What it is: The luminance at which the pre-calibration reading was done. This represents the luminance of the monitor when it is at the factory default settings.
:
193 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
75
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
70
RGB controls
What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
N/A
Color Temperature
What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6142 K
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
2.47
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
2.11
Gamma
What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.27

The out of the box accuracy of the LG 34WK95U is great. The 'sRGB' Picture mode is the most accurate one. Both the white balance and the color dE are under our threshold of 3, so few people will be able to spot the color inaccuracies. The color temperature is warmer than the 6500 K target, and the gamma is above the target curve for most of the input signal intensities resulting in slightly darker scenes.

9.7 Post Calibration
What it is: Monitor's color accuracy after a full calibration with a spectrophotometer.
When it matters: All graphics and video content on a monitor that has been professionally calibrated.
Score components:
Picture Mode
What it is: The picture mode that was used to do the calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
User
Luminance
What it is: The luminance at which the calibration was executed. We aim for a luminance level of 100 cd/m².
:
97 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
20
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
70
RGB Controls
What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
50-50-48
Color Temperature
What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6534 K
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.53
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
0.36
Gamma
What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.19

Excellent color accuracy of LG 34WK95U-W after calibration which was done on the 'Custom' Picture mode. White balance and color dEs are nearly perfect and most people won't be able to see any errors. The color temperature is very close to the target of 6500 K and gamma tracks the curve very closely.

You can download our ICC profile calibration here. This is provided for reference only and should not be used, as the calibration values vary per individual unit even for the same model due to manufacturing tolerances.

9.2 SDR Color Gamut
What it is: The palette of colors the monitor can display
When it matters: General content consumption or production
Score components:
sRGB xy
What it is: Coverage of the sRGB colorspace on CIE 1931 xy.
When it matters: Almost all content. Includes websites, standard windows environment and SDR movies
Good value: > 95%
Noticeable difference: 5%
:
99.9 %
Adobe RGB xy
What it is: Coverage of the Adobe RGB colorspace on CIE 1931 xy.
When it matters: Professional photography.
Good value: > 90%
Noticeable difference: 5%
:
84.2 %

s.RGB Picture Mode: Custom(calibrated)
Adobe RGB Picture Mode: Custom

The LG 34WK95U has an excellent SDR color gamut. It practically covers the entire s.RGB gamut and this is great for daily usage. The coverage of the Adobe RGB color space is very good, however, it might still not be enough for those professionals who work in the wider Adobe RGB gamut.

9.4 SDR Color Volume
What it is: How much of the SDR color spaces the monitor can reproduce
When it matters: General usage and SDR media creation
Score components:
sRGB in ICtCp
What it is: How much of the sRGB colorspace a monitor can display at different luminosity levels
When it matters: Most content, including web, SDR video games, and SDR media creation
:
97.9 %
Adobe RGB in ICtCp
What it is: How much of the Adobe RGB colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness.
When it matters: Professional media creation
:
89.3 %

s.RGB Picture Mode: Custom
Adobe RGB Picture Mode: Custom

Excellent color volume on the LG 34WK95U-W. Just like the Dell U3219Q, this monitor can display a full range of colors in various levels of luminance. Unfortunately, it cannot display the dark shades well due to the not so great contrast ratio.

7.8 HDR Color Gamut
What it is: The monitor's ability to reproduce HDR color spaces
When it matters: HDR content consumption or media creation
Score components:
Wide Color Gamut
What it is: Whether the monitor can support wider color gamuts
When it matters: HDR content and media creation
:
Yes
DCI P3 xy
What it is: Coverage of the DCI P3 colorspace on CIE 1931 xy
When it matters: When consuming or producing HDR content.
:
85.9 %
Rec. 2020 xy
What it is: Coverage of the Rec.2020 colorspace on CIE 1931 xy.
When it matters: When consuming or producing HDR content.
Good value: > 90%
Noticeable difference: 5%
:
69.5 %

DCI P3 Picture Mode: Vivid (HDR)
Rec. 2020 Picture Mode: Vivid (HDR)

Good HDR color gamut. Excellent coverage of the more common DCI P3 color gamut, but the coverage of the wider Rec. 2020 color gamut is only decent. However, since it is above our 60% threshold, we consider it to have a wide color gamut.

7.3 HDR Color Volume
What it is: How much of the HDR color spaces a monitor can display at different luminosity levels.
When it matters: HDR content consumption and production. Includes streaming services, UHD Blu-rays and HDR games.
Score components:
DCI-P3 in ICtCp
What it is: How much of the DCI-P3 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80%
Noticeable difference: 5%
:
76.6 %
Rec. 2020 in ICtCp
What it is: How much of the Rec. 2020 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80 %
Noticeable difference: 5 %
:
68.7 %

DCI P3 Picture Mode: Vivid (HDR)
Rec. 2020 Vivid (HDR)

Decent HDR color volume, better than the LG 32UL950. Unfortunately, the lack of high contrast ratio limits the color volume, especially in the dark shades of colors.

10 Image Retention
What it is: How much a static image is retained on a monitor screen after a certain amount of time.
When it matters: When working or playing video games on your PC monitor.
IR after 0 min recovery
What it is: Image retention measured right after the static image exposure, without recovery time.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 2 min recovery
What it is: Image retention measured after a recovery time of 2 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect
Noticeable difference: 0.015%
:
0.00 %
IR after 4 min recovery
What it is: Image retention measured after a recovery time of 4 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 6 min recovery
What it is: Image retention measured after a recovery time of 6 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 8 min recovery
What it is: Image retention measured after a recovery time of 8 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 10 min recovery
What it is: Image retention measured after a recovery time of 10 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %

There is no image retention on the LG 34WK95U-W, even immediately after displaying our static test image for 10 minutes.

9.8 Gradient
What it is: How finely levels of color can be displayed.
When it matters: Details in shadows, sky and skin tones. Matters more for HDR content.
Score components: Subjectively assigned
Color Depth
What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like HDR video games or HDR UHD movies. Won't matter for regular Blu-ray movies, SDR video game or desktop environment content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
10 Bit

Excellent gradient handling. Gradients are displayed almost perfectly with very little or almost no banding.

10 Color Bleed
What it is: How much the color from one area of the screen affects the color in another area of the screen.
When it matters: All usages, but especially media creation.
Score components:
Pixel row error
What it is: The amount of bleed that appears across the screen horizontally.
When it matters: General usage of a PC monitor, can appear when browsing the web or with media creation like graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %
Pixel column error
What it is: Amount of color bleeding that appears across the screen vertically.
When it matters: Most uses of a PC monitor. Can appear while browsing the web or when editing images or graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %

Perfect color display, with no color bleed neither in rows nor in columns.

7.5 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned

Good reflection handling. The light-matte finish diffuses reflections on the screen, reducing their intensity. It is fine for most rooms, but in a bright room, reflections may be distracting. Very similar to the Dell U2717D.

6.8

Motion

Score components:

The LG 34WK95U-W monitor has decent motion handling. It has a fast pixel response time and fast-moving content is displayed with little blur. Unfortunately, this monitor is not flicker-free and it only supports a refresh rate up to 60Hz. There is no Black Frame Insertion option to help make the image crisper, nor any support for variable refresh rate.

8.6 Motion Blur
What it is: The performance of the pixel response time. Poor response time causes trails to follow moving objects. Response time is one of a few sources of motion blur.
When it matters: When there's fast movement on screen, such as during video games and sports.
Score components:
80% Response Time
What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 8 ms
Noticeable difference: 4 ms
:
5.1 ms
100% Response Time
What it is: How quickly pixels can fully transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 20 ms
Noticeable difference: 10 ms
:
14.2 ms
Best Overdrive Setting
What it is: If the monitor has adjustable pixel overdrive settings, which one produces the best response time with minimal overshoot.
When it matters: When adjusting the monitor's settings to get the least possible motion blur.
:
Fast

Response Time Off
Response Time Normal
Response Time Fast
Response Time Faster

Excellent fast response time. The best Response Time setting is 'Fast', where we can see a little overshoot in some transitions but nothing too distracting. With the 'Normal' setting transitions are slower and with the 'Faster' setting, there is improvement in response time but also more overshoot.

Most of the blur in the photo above is due to persistence.

4.5 Image Flicker
What it is: Luminosity pattern when displaying images
When it matters: Nearly all the time during PC monitor use, but especially during fast movement such as video games
Flicker-free : No
PWM Dimming Frequency
What it is: Flickering pattern at different luminosities.
When it matters: For people sensitive to flickering.
Good value: N/A or high frequencies (> 300 Hz). Frequencies that are multiples of 60Hz are better.
:
240 Hz
Black Frame Insertion (BFI)
What it is: Option to turn screen black between frames
When it matters: Reduces eye tracking blur in motion
Good value: Yes
:
No
BFI Maximum Frequency
What it is: Highest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: Matches the native refresh rate
Noticeable difference: 20 Hz
:
N/A
BFI Minimum Frequency
What it is: Lowest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: 60 Hz
Noticeable difference: 20 Hz
:
N/A

This monitor dims the backlight using PWM. It is flicker-free only when the backlight is set at 100. Unfortunately, there is no option to introduce flicker to make the image crisper.

6.7 Refresh Rate
What it is: How frequently the monitor can refresh and show new frames, and whether it can vary its refresh rate in real time using technologies like G-sync and FreeSync.
When it matters: Mostly for gaming, but does provide a little better motion during normal usage.
Native
What it is: The frequency at which the monitor is capable of displaying images every second
When it matters: General usage, but better results are most important for gaming
Good value: >100 Hz
Noticeable difference: 15 Hz
:
60 Hz
Factory Overclock
What it is: The frequency at which the monitor's can be boosted to using its internal menu.
When it matters: Gaming and other usages where high frame rate content is consumed.
Good value: >100
Noticeable difference: 15
:
N/A
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
No
G-SYNC Compatible
What it is: We test for FreeSync compatibility with an NVIDIA GTX1060. We check for any excess blur, screen blanking, or excess tearing, and confirm the variable refresh rate range.
When it matters: If you have an NVIDIA graphics card.
Good value: Yes
:
No
VRR Maximum
What it is: The maximum frequency covered by the Variable Refresh Rate feature of the monitor.
When it matters: Any time the VRR feature is enabled.
Good value: Matches Refresh rate
Noticeable difference: 10 Hz
:
N/A
VRR Minimum
What it is: The lowest frequency covered by the monitor's Variable Refresh Rate feature.
When it matters: When using the VRR feature of the monitor at lower frame rates.
Good value: 30 Hz
:
N/A
VRR Maximum With OC
What it is: The maximum frequency covered by the Variable Refresh Rate feature when the monitor's overclocking feature is used.
When it matters: When both the overclocking and VRR features are used.
Good value: Matching the overclocked refresh rate.
Noticeable difference: 10 hz
:
N/A
VRR Supported Connectors : N/A

The LG 34WK95U-W has the very common native refresh rate of 60 Hz. There is no variable refresh rate feature like FreeSync or G-Sync. This is not an issue for most users but some competitive gamers might find this a deal breaker.

9.1

Inputs

Score components:

The LG 34WK95U-W has an excellent low input lag and large screen size. It has a 5k resolution that allows you to easily multitask or display two sources simultaneously.

9.0 Input Lag
What it is: Delay between input and onscreen reaction.
When it matters: General usage of the mouse and gaming.
Native Resolution
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at its native refresh rate.
When it matters: General usage and while playing video games.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.7 ms
Non-Native Res @ Native Refresh
What it is:

Lowest input lag possible at the center of the screen, when the monitor is displaying an alternative resolution at its native refresh rate. The non-native resolution tested depends on the native resolution of the monitor, following this pattern unless otherwise specified in the Input Lag text:

Native Resolution Non-Native Resolution Tested
4k UHD QHD
QHD FHD
FHD 1600x900
3440x1440 2560x1080
2560x1080 1920x1080
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.9 ms
Native Resolution @ 60 Hz
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at a refresh rate of 60 Hz.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.7 ms
Variable Refresh Rate
What it is: Lowest input lag possible at the center of the screen, when the monitor is using its Variable Refresh Rate feature at its native resolution.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
HDR
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying an HDR signal at its native resolution and refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.9 ms
Black Frame Insertion (BFI)
What it is: Lowest input lag possible at the center of the screen, when BFI is enabled and the monitor is displaying a signal at the highest supported BFI refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A

Non-native resolution tested: 3440 x 1440 @ 60Hz.

Excellent low input lag on the LG 34WK95U even when in HDR mode, or when a non-native resolution is sent to the monitor. This should please most gamers as the monitor is very responsive.

9.3 Resolution and Size
What it is: The number of pixels the monitor can display, and the surface area of its screen.
When it matters: All usages, but especially for office and media editing.
Score components:
Native Resolution : 5120 x 2160
Aspect Ratio : 21:9
Megapixels : 11.1 MP
Pixel Density : 163 PPI
Screen Diagonal : 34.0 inches
Screen Area : 415 sq inches

This is a large monitor with a 5K resolution which allows you to display many things on your screen at the same time and it is great for multitasking.

To take advantage of the high resolution you must use a DisplayPort connection. If you use an HDMI cable, due to bandwidth limits the resolution is limited to a maximum of 3840 x 2160 @ 60 Hz. In this case, the recommended resolution is 3440 x1440 @ 60Hz to respect the 21:9 aspect ratio.
The monitor, however, gives you an option to use the full resolution using two HDMI cables from the same computer by using its Picture By Picture option that makes the screen work as two separate 2560 x 2160 displays. However, in order to have a seamless operation as a single, large display, you will need the use of third-party software like AMD's Eyefinity since the native windows driver cannot avoid some tearing when a moving object crosses from one side of the screen to the other.

Inputs
Total Inputs
DisplayPort : 1 (DP 1.4)
Mini DisplayPort : No
HDMI : 2 (HDMI 2.0)
DVI : No
VGA : No
DisplayPort Out : No
USB : 2 (USB 3.0)
USB C : 1 (USB, Thunderbolt 3)
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : No
Digital Optical Audio Out : No
Analog Audio Out RCA : No

The USB Type - C port supports charging up to 85 Watts

Through the menu you can choose which USB port (USB-C or USB-B) is going to be used for upstream.

Features

The LG 34WK95U-W has built-in speakers and support for HDR10 and is equipped with some neat additional features like Picture-By-Picture and the ability to function as a KVM switch. The USB-C port supports Power Delivery up to 85W which is great if you have a compatible laptop or tablet. There are no gaming-specific features, and access to the OSD is done through the standard LG joystick control.

Additional Features
What it is: Additional features found on the monitor
Speakers
What it is: Whether or not the monitor features standalone speakers.
When it matters: When using your computer without headphones or a dedicated pair of speakers.
:
Yes
HDR10 : Yes

The LG 34WK95U has integrated speakers and supports HDR10. It is equipped with a few additional features some of which are typically found on most LG monitors:

  • Super Resolution+: an upscaling feature that tries to improve upscaling quality.
  • PBP (Picture By Picture): Used to display the output of two different inputs at the same time on the monitor. We also tested the monitor in this mode by connecting it to the same PC, and the PC recognized the monitor as two different displays.
  • DFC: Adjusts the brightness automatically according to the screen
  • Uniformity: (only available in Custom and sRGB) Adjusts uniformity of the image, but enabling it reduces the overall brightness, so we do not recommend it.

There are separate USB upstream ports that allow the monitor to function as a KVM switch by connecting your keyboard and mouse to the USB ports of the monitor. You can choose in the menu which USB (B or C) will serve as upstream however this requires accessing the OSD each time.
Finally, the USB-C port supports power delivery up to 85W.

Update 1/28/2019: we added a clarification regarding the use of KVM.

On-Screen Display (OSD)
Controls
In The Box

  • Manuals
  • CD-Rom
  • Power Cable
  • USB-C cable
  • USB-B cable
  • HDMI cable

Differences between Sizes and Variants

We tested the 34" LG 34WK95U, which is the only model available. 

If someone comes across a different type of panel or if their monitor doesn't correspond to our review, let us know and we will update the review. Note that some tests such as the gray uniformity may vary between individual units.

Model Size Native Resolution Refresh rate
34WK95U 34'' 5k 60Hz
32UL950 32'' 4k 60Hz
32UD59-B 32'' 4k 60 Hz
27UK650 27'' 4k 60 Hz
34BK95U-W 34" 5k 60Hz, 3-year warranty

Our 34WK95U was manufactured in August 2018.

Update 01/17/2019: LG has also made the 34BK95U-W available. It appears to be the exact same monitor as the 34WK95U, but with a standard 3 year warranty, instead of 1 year on the 34WK95U.

Compared to other Monitors

Left: ASUS ROG SWIFT PG348Q. Middle: LG 34WK95U. Right: Dell U3818DW
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The LG 34WK95U is a very good ultrawide monitor with a great resolution that will keep you happy in most usages. See our recommendations for the best 34 inch monitors and larger, the best monitors for Mac Mini, the best gaming monitors for PC, and the best 4k gaming monitors.

Dell U3818DW

The Dell U3818DW and the LG 34WK95U both have very similar performance. The Dell is flicker-free and has better ergonomics so you can easily place it to your liking. On the other hand, the LG supports HDR and has a slightly faster pixel response time that leaves a shorter blur trail in fast-moving content.

LG 32UL950-W

The LG 32UL950 is a bit better than the LG 34WK95U. The 32UL950 supports FreeSync, and has a more versatile stand that can be switched to a portrait orientation. The 34WK95U has a wider HDR color gamut and better color volume, as well as a wider format screen that delivers a more immersive gaming experience, and is better for multitasking.

Samsung C34F791/CF791

The two monitors are different types. For most people, the IPS panel LG 34WK95U is better than the VA panel Samsung CF791. The LG supports HDR, has better viewing angles, and has a lower input lag. On the other hand, the Samsung CF791 has better blacks and will perform better in a dark room.

ASUS ROG Swift PG348Q

The LG 34WK95U is slightly better overall than the ASUS ROG PG348Q. The LG 34WK95U has a higher resolution, supports HDR, and has slightly better gradient banding, whereas the ASUS is more of a gaming monitor that supports G-SYNC, is flicker-free, has less image blur, and supports FreeSync.

LG 34UC79G-B

The LG 34WK95U is a bit better than the LG 34UC79G-B overall. The 34WK95U has a higher resolution and size and supports HDR. The LG 34UC79G-B, on the other hand, is flicker-free has a lower input lag, and a much faster refresh rate and supports FreeSync, which is great for gaming.

+ Show more

Conclusion
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7.7 Mixed Usage
Score components:
The LG 34WK95U-W is a good monitor for most uses. It is bright enough for a bright office and it has wide viewing angles that allow you to easily share your work. It has a low input lag to please gamers and a fast response time to display fast content with little blur. However, its defining feature is its size and large resolution that allows you to display more on the screen.
7.8 Office
This is a very good monitor for office use. It is a good choice for a bright office as it can fight glare. The large size and its very high resolution allow you to place more of your work on the screen. The good viewing angles help the image remain accurate and you can easily demonstrate your work to a colleague sitting next to you. On the downside, the ergonomics on the monitor are not good, so if you plan to adjust it frequently, you should consider VESA mounting it.
The LG 34WK95U-W is a good monitor for gaming. It has a low input lag and is very responsive to your actions. However, its defining feature is its size and resolution. It has a 5k resolution and you can display more of the game arena on your screen and this is an advantage over your opponents. Unfortunately, it does not support any variable refresh rate and this can detract the more serious gamers from choosing it.
This is a good monitor for consuming multimedia. The input lag is very low and the monitor reacts almost instantly to your inputs. The screen size and resolution allow you to display high-res multimedia content on its native resolution and you can enjoy more details. The viewing angles are good so you can share your image with others and all will enjoy the same picture quality.
The 34WK95U-W is a good monitor for media creation. The screen size is large and the resolution is very high and allows you to display much of your content on the screen at the same time. The viewing angles are good and the low input lag makes it very responsive to your actions. Unfortunately, the monitor does not have good ergonomics and you might be better off if you VESA mount it.
6.8 HDR Gaming
This is a decent monitor for HDR Gaming. Unfortunately, the native contrast ratio is mediocre and the bad local dimming cannot help improve blacks in a dark room. The input lag is very low and the resolution and size are excellent. The HDR peak brightness is good enough for playing HDR Games but not high enough for watching HDR movies.

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