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Reviewed on Jul 24, 2018 , Eric Bousquet, Ian Cumming, Bruno St-Georges-Robert, Dimitris Katsaounis, Yannick Khong

LG 43UD79-B
MONITOR REVIEW

Usage Ratings - Version 1.0

Test Benches: test

  • 1.0: Fall 2017
7.1
Mixed Usage
Score components:
  • 30% Office
  • 30% Multimedia
  • 25% Gaming
  • 10% Media Creation
  • 5% HDR Gaming
Size : 43 "
Resolution : 3840x2160
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 43UD79 is a decent 4k monitor with an IPS panel. The high resolution and large 43" size is good for multitaskers, as it allows viewing multiple documents side-by-side. The IPS panel has a low native contrast ratio so blacks appear gray in a dark room, but the image also remains accurate when viewed from up close. The motion handling is decent, although it doesn't feel as fluid or responsive as other monitors with higher refresh rates.

Test Results
Design 7.0
Picture Quality 6.7
Motion 7.1
Inputs 9.1
Pros
  • Image remains accurate when viewed from up-close
  • Colors appear uniform
Cons
  • Blacks appear gray in the dark
  • Limited ergonomic adjustments

Check Price

7.0

Design

Score components: Subjectively assigned
LG 43UD79 Design Picture
Curved : No
Curve radius : N/A
Weight (without stand) : 27.6lbs (12.5 kg)
Weight (with stand) : 35.3lbs (16.0 kg)

The design of the LG 43UD79-B is decent. The base of the stand is rectangular and does not resemble other LG monitors. It will give you a hard time to position it exactly as you want it as the ergonomics are almost non-existent. You will be better off VESA mounting it. On other aspects of the design, the built quality is good and you should have no issues with it.

Stand
LG 43UD79 Stand picture
Width : 13.3" (33.9 cm)
Depth : 10.4" (26.3 cm)

The stand is sturdy and supports the monitor well. It has a fairly large footprint for the monitor's size, but this shouldn't be a problem on most tables.

0.9 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
LG 43UD79 Ergonomics picture
Height Adjustment : N/A
Switch portrait/landscape : No
Swivel Range : N/A
Tilt Range : -10° to 5°

Terrible ergonomics on the LG 43UD79 monitor. Unless you VESA mount it you will have almost no freedom in adjusting it.

Back
LG 43UD79 Back picture
Wall Mount : VESA 200x200

The back of the 43" LG 43UD79-B monitor looks good. There is a VESA mount for attaching it to a stand (something we recommend you do if you wish to have any positioning adjustment capability). All of the inputs are pointing downwards on the center of the back of the monitor, and the rear of the stand provides a small passage for cable management.

Borders
LG 43UD79 Borders picture
Borders : 0.6" (1.4 cm)

The borders have an average thickness and look good in their matte finish.

Thickness
LG 43UD79 Thickness picture
Thickness (with stand) : 7.8" (19.7 cm)
Thickness (without stand) : 2.8" (7.1 cm)

This LG monitor is quite thick which is understandable for its size.

7.0 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
LG 43UD79 Build Quality picture

The build quality is good with no gaps or loose ends. The monitor frame is almost entirely plastic, and feels good.

The picture quality of the LG 43UD79 is decent. It has an IPS panel that will not give you deep blacks in dark rooms but on the other hand, the monitor has good viewing angles and you will not have any uniformity issues on the edges if you sit close to this large size monitor. It has decent brightness and good reflection handling so placing it in average-lit environments is best. The gray uniformity is also good so you are unlikely to notice major clouding when browsing the web. Finally, it has a wide color gamut and very good color accuracy.

5.7 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:
LG 43UD79 Checkerboard Picture
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
:
859 : 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
:
N/A

The monitor has a disappointing contrast ratio. The LG 43UD79 is not a monitor for use in a dark room as it can't really reproduce deep blacks. However, this should not be an issue for a brighter room and is on par with other IPS monitors.

0 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.
:
No
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.
:
Direct

The LG 43UD79-B does not have a local dimming feature. The video is for reference only.

7.2 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 TV 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.
:
262 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
:
292 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
:
288 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.
:
288 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.
:
287 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.
:
287 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.
:
287 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.
:
282 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.
:
283 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.
:
283 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.
:
283 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
:
0.001

The SDR peak brightness of the monitor is decent. The LG 43UD79-B manages to keep a stable level of brightness no matter how much area of the screen the white square covers, and this is great. This is good for consistent brightness levels as you change between windows.

0 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 : N/A
HDR Peak 2% Window : N/A
HDR Peak 10% Window : N/A
HDR Peak 25% Window : N/A
HDR Peak 50% Window : N/A
HDR Peak 100% Window : N/A
HDR Sustained 2% Window : N/A
HDR Sustained 10% Window : N/A
HDR Sustained 25% Window : N/A
HDR Sustained 50% Window : N/A
HDR Sustained 100% Window : N/A
HDR ABL : N/A

HDR is not supported.

7.4 Horizontal Viewing Angle
What it is: Color accuracy when viewed from the side.
LG 43UD79 Horizontal Color Shift Picture
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°
:
38 °
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°
:
42 °
LG 43UD79 Horizontal Brightness Picture
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°
:
48 °
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°
:
51 °
LG 43UD79 Horizontal Black Level Picture
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 on this IPS panel LG 43UD79-B monitor. The image remains accurate for relatively large angles from the center, and this is great.

8.4 Vertical Viewing Angle
What it is: Color accuracy when viewed from the top or bottom.
LG 43UD79 Vertical Color Shift Picture
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°
:
30 °
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°
:
33 °
LG 43UD79 Vertical Brightness Picture
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°
:
37 °
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°
:
38 °
LG 43UD79 Vertical Black Level Picture
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 °

The vertical viewing angles of the LG 43UD79 are very good. They will not cause any uniformity issues even when you view the monitor from up close.

7.6 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
LG 43UD79 50% Uniformity Picture
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%
:
4.668 %
50% DSE
What it is: 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%
:
0.163 %
LG 43UD79 5% Uniformity Picture
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%
:
0.544 %
5% DSE
What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.063 %

The gray uniformity of the LG monitor is good. There is a little clouding and some dirty screen effect present when browsing the web, but most people won't notice it.

3.8 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
LG 43UD79 Native Black Uniformity Picture
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.
:
3.459 %
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.
:
N/A

The black uniformity is very bad. In the intentionally overexposed test image above, you can observe the clouding that forms on either side of the screen. This will not look as severe in person.

8.3 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:
LG 43UD79 Pre Calibration Picture LG 43UD79 Pre Gamma Curve Picture LG 43UD79 Pre Color Picture
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.
:
Dark Room 1
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.
:
131 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
35
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
:
6588 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
:
1.88
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
2.56
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
:
2.26

The out-of-the-box color accuracy of this monitor is very good. The best out of the box settings were obtained with the Dark Room 1 picture mode. With these settings, the white balance dE was well below our target of 3, and the color dE was at 2.56. Gamma was slightly higher than our target of 2.2 and color temperature was almost at our target of 6500K. All these mean that very few people will notice color inaccuracies.

9.5 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:
LG 43UD79 Post Calibration Picture LG 43UD79 Post Gamma Curve Picture LG 43UD79 Post Color Picture
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.
:
Custom
Luminance
What it is: The luminance at which the calibration was executed. We aim for a luminance level of 100 cd/m².
:
101 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
16
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.
:
58-42-25
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
:
6424 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
:
1.01
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
:
2.18

The post calibration color accuracy of the LG 43UD79-B is excellent. We changed the picture mode to Custom and set the RGB colors to 58-42-25, the Luminance setting to 16 and the Contrast to 70. This gave us the results that you see above which are excellent in terms of color accuracy.

You can download our ICC profile calibration here.

8.4 SDR Color Gamut
What it is: The palette of colors the monitor can display
When it matters: General content consumption or production
Score components:
LG 43UD79 Color Gamut s.RGB Picture
s.RGB xy
What it is: Coverage of the s.RGB 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%
:
95.0 %
LG 43UD79 Color Gamut ARGB Picture
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%
:
73.1 %

sRGB picture mode tested: Custom
Adobe RGB picture mode tested: Photo

This LG 43UD79-B monitor has a great coverage of the s.RGB colorspace that is used in most applications. However, the coverage of the wider Adobe is limited and probably won't be enough for users that want to edit for professional graphics or print applications.

7.8 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:
LG 43UD79 s.RGB Color Volume ITP picture
s.RGB in ICtCp
What it is: How much of the s.RGB colorspace a monitor can display at different luminosity levels
When it matters: Most content, including web, SDR video games, and SDR media creation
:
79.8 %
LG 43UD79 Adobe RGB Color Volume ITP Picture
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
:
76.3 %

sRGB picture mode tested: Custom
Adobe RGB picture mode tested: Photo

The color volume of this monitor is very good. However, it's disappointing contrast does not allow it to display dark shades of colors well.

0 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
:
No
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.
:
N/A
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%
:
N/A

HDR is not supported.

0 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%
:
N/A
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 %
:
N/A

HDR is not supported.

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.
LG 43UD79 Image Retention Picture
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 %
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 %
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 %
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 %
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 %
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 %

A perfect result on our image retention test, as no retention was measured even right after the bright 10 minutes static scene. This is at par with the other IPS panel monitors, like the LG 32UD59-B and an improvement over the 27UD68P-B.

9.3 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
LG 43UD79 Gradient Picture
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

The LG 43UD79 does a remarkable job at displaying the gradient test image. There is almost no banding visible. As this monitor supports 10-bit input, no banding generally seen on 8-bit monitors is visible. Overall, this is an excellent result.

9.9 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:
LG 43UD79 Color bleed horizontal
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%
:
0.011 %
LG 43UD79 Color bleed vertical
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%
:
0.010 %

Almost a perfect score in color bleed. Nearby colors are not affected by large uniform shades and this is good for accuracy.

7.5 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
LG 43UD79 Average room LG 43UD79 Average room off picture LG 43UD79 Bright room off picture

The LG 43UD79-B is good at handling reflections. Its light matte coating reduces the intensity of direct reflections and diffuses them across the screen. You should not have any issues unless the room is very bright.

7.1

Motion

Score components:

The LG 43UD59-B has decent motion handling. It has a fast response time and that is good for fast moving content like first-person shooters, but the monitor does not support any of the advanced gaming features like variable refresh rate to avoid tearing, and it only has 60Hz refresh rate.

8.1 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:
LG 43UD79 Motion Blur Picture LG 43UD79 Response Time Chart
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
:
6.6 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
:
14.8 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.
:
Normal

Response Time Off
Response Time Slow
Response Time Normal
Response Time Fast

The response time on the LG 43UD79-B is great, which is good for fast moving content like first-person shooters. The Response Time Normal overdrive setting is the most balanced; the Fast setting has a faster 80% response time, but since it adds a lot of overshoot its 100% response time was noticeably longer.

7.5 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
LG 43UD79 Backlight Picture
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.
:
0 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 LG 43UD79-B has no visible flicker in its backlight as it dims, which is great.We did measure some flicker with our photodiode tool, but this will not be visible in person. This lack of visible flicker makes motion look smoother.

There is no Black Frame Insertion option that helps clear up blur, on this monitor.

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
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

Mediocre refresh rate results. This monitor only supports a refresh rate of 60Hz, and has no variable refresh rate option to smooth out tearing.

9.1

Inputs

Score components:

The LG 43UD79-B is a large size monitor with native 4k UHD support. It has a low input lag that will please gamers and has sockets for a variety of inputs.

8.9 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
:
9.6 ms
Non-Native Resolution
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
:
9.9 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
:
9.6 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
:
N/A
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

The input lag of the LG 43UD79-B is excellent and will keep most satisfied except maybe the most competitive e-sports gamers. Many 60Hz monitors have similar input lag, like the such as the LG 32UD59-B or the Dell U2715H. Other 144Hz monitors like the Samsung CHG70 have lower input lag due to their higher refresh rates.

9.4 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 : 4K UHD, 3840 x 2160
Aspect Ratio : 16:9
Megapixels : 8.3 MP
Pixel Density : 104 PPI
Screen Diagonal : 42.5 inches
Screen Area : 770 sq inches

This LG 43UD79 has an excellent resolution for its 43" size. It is a pure 4k UHD monitor that has a high pixel per inch density and it is hard to spot individual pixels. The size is great for multitasking.

Inputs
LG 43UD79 Inputs 1

All the inputs are pointing downwards.

Total Inputs
DisplayPort : 1 (DP 1.2)
Mini DisplayPort : No
HDMI : 2 (HDMI 2.0), 2 (HDMI 1.4)
DVI : No
VGA : No
DisplayPort Out : No
USB : 2 (USB 3.0)
USB C : 1 (DisplayPort Alternate Mode)
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : No
Digital Optical Audio Out : No
Analog Audio Out RCA : No

HDMI 1/2 only support 4K@30Hz (HDMI 1.4).

HDMI 3/4 can support 4K@60Hz (HDMI 2.0).

USB port 1 supports fast charging when the Quick Charge setting is enabled.

Features

The LG 43UD79-B has some amazing features like the Picture-In-Picture (PIP) or even Picture-Beside-Picture (PBP), that allow you to use the large size of the monitor to its full extent. This monitor also has speakers which can get very loud and sound better than the average monitor speakers even though they lack some bass.

Additional Features
What it is: Additional features found on the monitor
Score components:
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 : No

Some major features of the LG 43UD79-B are the Picture-In-Picture (PIP) and Picture-Beside-Picture (PBP) modes, which share the screen between up to two different inputs (PIP) or four inputs (PBP). This way, the 43UD79-B can act as up to four 1080p monitors in PBP. The display area of the Sub input can be adjusted as well as its transparency in the PIP mode.

The monitor can enable fast charging on USB port 1 by activating the Quick Charge setting.

The speakers can get considerably loud during playback. Even though the speakers lack some bass, which is usual for monitor speakers, they produce a clear sound that will satisfy most people.

On-Screen Display (OSD)
LG 43UD79 OSD picture

The on-screen display is well-organized, quite intuitive and easy to use.

Controls
LG 43UD79 Controls picture

There is a small joystick nub under the center of the screen which controls the on-screen display and also acts as the power button. This way of navigating the OSD is very intuitive and is better than the four button scheme present on most monitors. This joystick is used on many other LG monitors like the 27UD58-B, as well as on some Samsung monitors like the CHG90.

In The Box
LG 43UD79 In The Box picture

  • Manual and drivers
  • Power cable
  • DisplayPort cable
  • HDMI cable
  • Remote
  • Batteries
  • USB-A to USB-C adapter

Differences between Sizes and Variants

We tested the 43" model (43UD79-B). However, variants of the monitor exist in 27" (27UD58-B) and 32" (32UD59-B). It is also closely related to the 2018 model 32UD60-B, and HDR model 32UD99-W.

If someone comes across a different type of panel or if their 43UD79-B 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 Refresh rate Year Notes
27UD58-B 27" 60Hz 2016 Black variant
32UD59-B 32" 60Hz 2017 Black variant
32UD60-B 32" 60Hz 2018 Black variant
32UD99-W 32" 60Hz 2017 White variant. Supports HDR10
43UD79-B 43" 60Hz 2017 Black variant

Compared to other Monitors

LG 43UD79 Group Shot Picture
Left: Dell U3417W. Middle: LG 43UD79-B. Right: LG 32UD59-B.
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The LG 43UD79-B is a decent monitor for most usages. It has a native 4k resolution and its large size and good viewing angles make it a good choice for working with colleagues.

LG 32UD59-B

The LG 32UD59-B is better than the LG 43UD79, unless the larger screen is really important to you. The LG 32UD59-B has better ergonomics and can be more easily adjusted to a comfortable viewing position than the 43UD79, which has very little adjustments. The LG 32UD59-B has better motion handling, as the faster refresh rate produces less motion blur. The 43UD79 has wider viewing angles, which is important for a screen this size.

Dell U2717D

The Dell U2717D and the LG 43UD79 are very similar, and the best one will depend on your needs. For productivity, the LG 43UD79 offers more screen real estate, making it easier to see more and do more at the same time. The Dell U2717D offers better ergonomics that can be easily adjusted for the optimal viewing position, which is great if you have multiple users.

Dell U3417W

The Dell U3417W is a bit better than the LG 43UD79. The U3417W is a bit brighter and has more vibrant colors due to the better color volume. The U3417W has better ergonomics and it is easier to adjust to a comfortable position, whereas the LG 43UD79 has very limited adjustments. It has lower input lag and the larger screen provides more screen real estate, good for productivity.

Dell U2715H

The Dell U2715H is better than the LG 43UD79, unless you want a large screen. The Dell U2715H has much better ergonomics and can easily be adjusted for an optimal viewing position, great if multiple people will be using the monitor. The LG 43UD79 has a much larger screen and higher native resolution, so you can see more details and it is easier to multitask.

Samsung UE590

The LG 43UD79 is a better monitor than the Samsung UE590 for almost every usage. It is larger in size and has better viewing angles due to its IPS panel vs the TN panel of the UE590, so it is more suitable for cooperative use.  On the other hand, the UE590 has the FreeSync implementation of the variable refresh rate technology that helps remove tearing and gamers will find it more appealing. 

HP V320

The LG 43UD79 is a better monitor than the HP V320. They both have IPS panels that offer decent viewing angles, but the 43 inch LG is larger and has UHD resolution that simply gives you more screen space and detail to work on. The LG has also an out-of-the-box picture quality that is better. 

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Conclusion
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7.1Mixed Usage
Score components:
  • 30% Office
  • 30% Multimedia
  • 25% Gaming
  • 10% Media Creation
  • 5% HDR Gaming
The LG 43UD79 is a decent monitor for mixed usage. It has good viewing angles that make suitable for a wide room, but blacks are not deep and it is not great in dim environments. It has a great low input lag and this is great for gaming. It has Picture-In-Picture and Picture-Beside-Picture features that can make great use of its large size.
This is a decent monitor for office usage. It is large in size with good viewing angles that will allow you to comfortably work with your colleagues. You will have some trouble positioning where and how you want it, but once you do it will deliver very good performance.
This is a decent monitor for gaming. It has an excellent low input lag that makes it very responsive, and its large size and 4k UHD resolution will allow you to enjoy more detail. On the other hand, it only supports 60Hz refresh rate and lacks more advanced gaming features Variable Refresh Rate that helps remove tearing. Overall you will enjoy gaming with this monitor if you overcome the difficulty in positioning it to your liking.
The LG 49UD79 is a decent monitor for multimedia usage. It has good viewing angles and its large size and UHD resolution will allow you to enjoy various types of multimedia content well. It will perform better in an average lit room rather than a dark one as it handles reflections well, and blacks will not look grayish as in the dark room.
This is a decent monitor for media creation. Its large size and excellent resolution will are great tools for those who need the extra screen space to work. Unfortunately, the coverage of the wider Adobe RBG color space is not as good as most professional would want it for their job.
This monitor doesn't support HDR. This is common for most monitors, as HDR is a relatively new feature for PCs. For an HDR monitor, see the Samsung CHG70.

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