LG 27GN800-B Monitor Review

Tested using Methodology v1.1
Reviewed Mar 31, 2021 at 09:51 am
LG 27GN800-B Picture
7.6
Mixed Usage
7.4
Office
8.2
Gaming
7.6
Multimedia
7.5
Media Creation
6.8
HDR Gaming
Size 27"
Resolution 2560x1440
Max Refresh Rate
144 Hz
Pixel Type
IPS
Variable Refresh Rate
Adaptive Sync

The LG 27GN800-B is a great gaming monitor from LG's UltraGear lineup. It's very similar to the LG 27GN850-B with a nearly identical panel but a much cheaper stand, so don't expect much ergonomic adjustability. When it comes to gaming, it delivers exceptionally smooth motion thanks to its fast response time and 144Hz refresh rate. It also has low input lag and variable refresh rate (VRR) support. Like other IPS panels, it has a low contrast ratio that makes blacks look gray in the dark, but on the upside, its viewing angles are wide enough to easily share content on your screen. Glare shouldn't be an issue either since it gets quite bright and has great reflection handling. While it has a wide HDR color gamut and delivers an okay HDR experience, it doesn't get bright enough to make highlights truly pop. On the upside, it has a fantastic color gamut in SDR.

Our Verdict

7.6 Mixed Usage

The LG 27GN800-B is a good all-around monitor. It delivers exceptionally smooth motion due to its high refresh rate and fast response time. Gamers should also be pleased with its low input lag and VRR support. The size and resolution are well-suited to multitasking and productivity, and it has a wide SDR color gamut and gets bright enough to overcome glare. It's less suited to HDR gaming because of its low contrast ratio and mediocre HDR brightness.

Pros
  • Exceptionally fast response time.
  • Bright enough to fight glare.
  • Size and resolution are well-suited for many uses.
Cons
  • Poor contrast ratio.
  • Cheap stand with terrible ergonomics.
7.4 Office

The LG 27GN800-B is a decent office monitor. It can overcome glare in bright lighting conditions thanks to its high peak brightness and reflection handling. It's big enough to open windows side-by-side, and its 1440p resolution delivers a crisp image. Unfortunately, it has terrible ergonomics, so you'll need to mount it if you want more adjustability in terms of placement and viewing position.

Pros
  • Bright enough to fight glare.
  • Good size and resolution for multitasking.
Cons
  • Poor contrast ratio.
  • Cheap stand with terrible ergonomics.
8.2 Gaming

The LG 27GN800-B is great for gaming. It has a high refresh rate, exceptionally fast response time, and low input lag. It also supports VRR to reduce screen tearing. Unfortunately, it has a low contrast ratio, so blacks look grayish, and it has terrible ergonomics, so you may have to mount it to get your ideal viewing position.

Pros
  • Exceptionally fast response time.
  • Low input lag.
  • Native FreeSync and G-SYNC compatible.
Cons
  • Poor contrast ratio.
  • Cheap stand with terrible ergonomics.
7.6 Multimedia

The LG 27GN800-B is good for multimedia. Its size is large enough to comfortably watch movies or videos, and the 1440p resolution produces a crisp image. It also has great reflection handling and high peak brightness, so glare shouldn't be an issue. Unfortunately, it has a poor contrast ratio that makes blacks look gray. On the upside, its wide viewing angles make it easy to watch with a friend or from an angle.

Pros
  • Bright enough to fight glare.
  • Wide viewing angles.
  • Big enough to comfortably watch movies.
Cons
  • Poor contrast ratio.
  • Cheap stand with terrible ergonomics.
7.5 Media Creation

The LG 27GN800-B is good for media creation. It's a good size for multitasking and opening multiple windows, and the 1440p resolution makes for a crisp image. It also has a fantastic SDR color gamut. Unfortunately, it has a low contrast ratio, so blacks look gray, especially in a dark room. It also has terrible ergonomics, so you may have to mount it for an ideal viewing position.

Pros
  • Bright enough to fight glare.
  • Fantastic SDR color gamut.
  • Good size and resolution for multitasking.
Cons
  • Poor contrast ratio.
  • Cheap stand with terrible ergonomics.
6.8 HDR Gaming

The LG 27GN800-B is an okay monitor for HDR gaming. Its high refresh rate, fast response time, and low input lag are great for gaming. It does have a wide color gamut for HDR. However, it doesn't get bright enough to make highlights really pop, and it can't produce deep blacks due to its low contrast ratio.

Pros
  • Exceptionally fast response time.
  • Low input lag.
  • Native FreeSync and G-SYNC compatible.
Cons
  • Poor contrast ratio.
  • Highlights don't pop as they should.
  • Cheap stand with terrible ergonomics.
  • 7.6 Mixed Usage
  • 7.4 Office
  • 8.2 Gaming
  • 7.6 Multimedia
  • 7.5 Media Creation
  • 6.8 HDR Gaming

Test Results

perceptual testing image
Design
Design
Style
Curved No
Curve Radius Not Curved
Weight (without stand)
11.9 lbs (5.4 kg)
Weight (with stand)
13.4 lbs (6.1 kg)

The LG 27GN800-B has a simple design with light gamer-oriented touches that are typical of LG's UltraGear lineup, but it also wouldn't look out of place in an office. It looks very similar to the LG 27GN850-B, except for the stand. Like other LG gaming monitors, it’s adorned with red accents.

Design
Stand
Width
18.6" (47.3 cm)
Depth
9.3" (23.5 cm)

The stand is much simpler than the stand on the LG 27GN850-B. Its V-shaped footprint leaves plenty of desk space in front. The feet are made of metal, capped in plastic.

1.1
Design
Ergonomics
Height Adjustment
0.0" (0.0 cm)
Switch Portrait/Landscape No
Swivel Range No swivel
Tilt Range -15° to 2.5°

The LG 27GN800 has terrible ergonomics. It’s a tilt-only stand with a somewhat limited tilt range, no swivel, and no height adjustment. It’s fine if you’re planning on VESA-mounting it, but otherwise, it may be difficult to find an ideal viewing position.

Design
Back
Wall Mount VESA 100x100

The back has a gamer-oriented design, like other LG UltraGear monitors, with a circular bit that has red accents. There is no cable management.

Design
Borders
Borders
0.3" (0.8 cm)

The borders are thin and shouldn’t be distracting in a multi-monitor setup.

Design
Thickness
Thickness (with stand)
6.0" (15.2 cm)
Thickness (without stand)
3.0" (7.5 cm)

The monitor itself is pretty thin. That said, when you remove the stand, there's still a metal nub that sticks out, making it thicker than it would be otherwise.

7.0
Design
Build Quality

The LG 27GN800-B feels decently built. It’s entirely plastic, except for the feet, but there are no obvious gaps or issues in its construction, and the panel doesn't have any flex, which is good. However, the stand and mounting plate on the back look cheap, and the plastic caps on the feet feel a little flimsy, as do the tilt hinges.

Picture Quality
5.7
Picture Quality
Contrast
Native Contrast
841 : 1
Contrast With Local Dimming
N/A

The LG 27GN800-B has a sub-par contrast ratio, so blacks look more like gray when viewed in the dark, although that's expected from an IPS panel. Ours is lower than the advertised 1000:1, but contrast can vary between units.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

The LG 27GN800 doesn't have local dimming. The video above is provided for reference only.

7.7
Picture Quality
SDR Peak Brightness
SDR Real Scene
304 cd/m²
SDR Peak 2% Window
328 cd/m²
SDR Peak 10% Window
329 cd/m²
SDR Peak 25% Window
329 cd/m²
SDR Peak 50% Window
330 cd/m²
SDR Peak 100% Window
330 cd/m²
SDR Sustained 2% Window
328 cd/m²
SDR Sustained 10% Window
329 cd/m²
SDR Sustained 25% Window
329 cd/m²
SDR Sustained 50% Window
330 cd/m²
SDR Sustained 100% Window
329 cd/m²
SDR ABL
0.000

The LG 27GN800-B has good peak brightness in SDR, but it's lower than the advertised 350 nits. In real scenes, it's closer to 300 nits, but thankfully, it's consistent across different content and still enough to overcome glare in moderate lighting conditions.

We measured the SDR peak brightness after calibration, using the 'Gamer 1' Picture Mode with Brightness set to max.

6.4
Picture Quality
HDR Peak Brightness
HDR Real Scene
346 cd/m²
HDR Peak 2% Window
371 cd/m²
HDR Peak 10% Window
373 cd/m²
HDR Peak 25% Window
372 cd/m²
HDR Peak 50% Window
373 cd/m²
HDR Peak 100% Window
372 cd/m²
HDR Sustained 2% Window
371 cd/m²
HDR Sustained 10% Window
372 cd/m²
HDR Sustained 25% Window
372 cd/m²
HDR Sustained 50% Window
372 cd/m²
HDR Sustained 100% Window
372 cd/m²
HDR ABL
0.000

HDR peak brightness isn't bad. It's brighter than SDR but not bright enough to really make highlights in HDR content pop. That said, it stays consistent across different content.

We measured the HDR peak brightness using the 'Gamer 2' Picture Mode with HDR enabled and Brightness at max.

8.5
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
50 °
Color Washout From Right
47 °
Color Shift From Left
56 °
Color Shift From Right
55 °
Brightness Loss From Left
50 °
Brightness Loss From Right
49 °
Black Level Raise From Left
70 °
Black Level Raise From Right
70 °
Gamma Shift From Left
58 °
Gamma Shift From Right
57 °

The LG 27GN800-B has excellent horizontal viewing angles, so the image stays largely accurate as you move off-center. It's great for sharing content or watching from an angle.

6.6
Picture Quality
Vertical Viewing Angle
Color Washout From Below
31 °
Color Washout From Above
31 °
Color Shift From Below
38 °
Color Shift From Above
41 °
Brightness Loss From Below
35 °
Brightness Loss From Above
37 °
Black Level Raise From Below
70 °
Black Level Raise From Above
23 °
Gamma Shift From Below
31 °
Gamma Shift From Above
30 °

The vertical viewing angles are okay. You may notice a loss in image accuracy if you mount the monitor above or below eye level.

8.4
Picture Quality
Gray Uniformity
50% Std. Dev.
4.072 %
50% DSE
0.112 %
5% Std. Dev.
0.574 %
5% DSE
0.071 %

The LG 27GN800-B has impressive gray uniformity, although this may vary between units. The edges of the screen appear a bit darker, but there's minimal dirty screen effect, and uniformity is even better in near dark scenes.

4.5
Picture Quality
Black Uniformity
Native Std. Dev.
3.033 %
Std. Dev. w/ L.D.
N/A

Black uniformity is bad, but this can vary between units. The whole screen looks more blue-gray than black, and there's noticeable blooming around bright objects and significant backlight bleed in the corners.

6.8
Picture Quality
Pre Calibration
Picture Mode
Gamer 1
Luminance
333 cd/m²
Luminance Settings
100
Contrast Setting
70
RGB Controls
50-50-50
Gamma Setting
Mode 2
Color Temperature
6688 K
White Balance dE
3.13
Color dE
3.97
Gamma
2.12

Out-of-the-box, the LG 27GN800-B has alright color accuracy, though this may vary between units. Most colors are somewhat off, and so is white balance. Gamma doesn't follow the curve at all, so most scenes are brighter than they should be. Lastly, the color temperature is a bit colder than our target, so scenes have a blue-ish tint. There's no 'sRGB' Picture Mode, so we used the 'Gamer 1' setting.

9.6
Picture Quality
Post Calibration
Picture Mode
Gamer 1
Luminance
98 cd/m²
Luminance Settings
14
Contrast Setting
70
RGB Controls
49-50-49
Gamma Setting
Mode 2
Color Temperature
6410 K
White Balance dE
0.76
Color dE
0.43
Gamma
2.18

After calibration, the accuracy is fantastic. Any remaining inaccuracies shouldn't be noticeable without a colorimeter. Gamma is also much better, though very dark and very bright scenes may still be a bit over-brightened. The color temperature is now closer to the target.

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

9.5
Picture Quality
SDR Color Gamut
sRGB xy
100.0 %
Adobe RGB xy
89.4 %
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

The LG 27GN800-B has an exceptional color gamut, even wider than the LG 27GN850-B. It has full coverage of the sRGB color space and excellent coverage of the wider Adobe RGB used in photo editing.

9.4
Picture Quality
SDR Color Volume
sRGB In ICtCp
97.1 %
Adobe RGB In ICtCp
91.4 %
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

SDR color volume is fantastic. Thanks to its wide color gamut, it can display colors at a wide range of luminance levels, but it struggles with really dark, saturated colors because of its low contrast ratio.

8.0
Picture Quality
HDR Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
91.8 %
Rec. 2020 xy
67.6 %
DCI P3 Picture Mode
Gamer 2
Rec. 2020 Picture Mode
Gamer 2

The LG 27GN800-B has a wide HDR color gamut. Its coverage of the commonly used DCI P3 color space is superb, but its coverage of the wider Rec. 2020 is only okay.

6.7
Picture Quality
HDR Color Volume
DCI-P3 In ICtCp
76.4 %
Rec. 2020 In ICtCp
57.0 %
DCI P3 Picture Mode
Gamer 2
Rec. 2020 Picture Mode
Gamer 2

HDR color volume is alright. It struggles with colors at lower luminance levels because of its low contrast ratio, and it also has trouble with bright colors due to its relatively low HDR brightness.

10
Picture Quality
Image Retention
IR After 0 Min Recovery
0.00 %
IR After 2 Min Recovery
0.00 %
IR After 4 Min Recovery
0.00 %
IR After 6 Min Recovery
0.00 %
IR After 8 Min Recovery
0.00 %
IR After 10 Min Recovery
0.00 %

There are no signs of temporary image retention, but this can vary between units.

9.8
Picture Quality
Gradient
Color Depth
10 Bit

The LG 27GN800-B has fantastic gradient handling. Banding is hardly noticeable in any shade.

9.7
Picture Quality
Color Bleed
Pixel Row Error
0.000 %
Pixel Column Error
0.060 %

There's a tiny bit of color bleed in the vertical columns, but this shouldn't be noticeable with regular content.

8.1
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
4.8 %
Indirect Reflections
4.1 %
Calculated Direct Reflections
0.7 %

Great reflection handling. Its matte coating does a fantastic job of diffusing direct light, so glare shouldn't be an issue.

7.0
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

The LG 27GN800-B has decent text clarity. With ClearType enabled (top photo), curved and diagonal lines are even clearer, as you can see in the R, N, G, and S.

Motion
9.7
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Normal
Rise / Fall Time
3.2 ms
Total Response Time
5.9 ms
Overshoot Error
1.3 %
Dark Rise / Fall Time
3.2 ms
Dark Total Response Time
6.6 ms
Dark Overshoot Error
2.5 %

Overdrive SettingResponse Time ChartResponse Time TablesMotion Blur Photo
OffChartTablePhoto
NormalChartTablePhoto
FastChartTablePhoto
FasterChartTablePhoto

The LG 27GN800-B has an exceptional response time at its maximum refresh rate, resulting in very little motion blur. We recommend using the 'Normal' overdrive setting, because it's the fastest setting with an acceptable amount of overshoot.

9.3
Motion
Response Time @ 60Hz
Best Overdrive Setting
Off
Rise / Fall Time
3.8 ms
Total Response Time
10.2 ms
Overshoot Error
0 %
Dark Rise / Fall Time
4.2 ms
Dark Total Response Time
10.0 ms
Dark Overshoot Error
0.0 %

Overdrive SettingResponse Time ChartResponse Time TablesMotion Blur Photo
OffChartTablePhoto
NormalChartTablePhoto
FastChartTablePhoto
FasterChartTablePhoto

The response time at 60Hz is not quite as fast as at the max refresh rate but still fantastic. We recommend setting the overdrive to 'Off' as the other options are either slower or have too much overshoot.

10
Motion
Image Flicker
Flicker-Free Yes
PWM Dimming Frequency
0 Hz

This monitor uses a flicker-free backlight, which can help reduce eye strain.

6.0
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
Yes
BFI Maximum Frequency
144 Hz
BFI Minimum Frequency
120 Hz

The LG 27GN800-B has an optional Black Frame Insertion (BFI) feature, which is also known as backlight strobing. It helps reduce motion blur by flickering the backlight. However, the BFI range is quite limited, and it can't be used with VRR. Note that our BFI score is based on the minimum and maximum frequency at which it operates, not the BFI's performance.

9.0
Motion
Refresh Rate
Native
144 Hz
Max Refresh Rate
144 Hz
Variable Refresh Rate
Yes
FreeSync
Yes
G-SYNC
Compatible (NVIDIA Certified)
VRR Maximum
144 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors DisplayPort, HDMI

The LG 27GN800-B has a high 144Hz refresh rate. It supports FreeSync VRR natively and is NVIDIA-certified as G-SYNC compatible. Both FreeSync and G-SYNC work over a wide refresh rate range over DisplayPort, but G-SYNC doesn't work over HDMI.

Inputs
9.5
Inputs
Input Lag
Native Resolution
4.0 ms
Native Resolution @ 60Hz
8.9 ms
Variable Refresh Rate
4.4 ms
Variable Refresh Rate @ 60Hz
9.4 ms
10 Bit HDR
N/A
Black Frame Insertion (BFI)
7.4 ms

Incredibly low input lag. It's slightly higher at 60Hz, but that shouldn't be noticeable to most people. We weren't a