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LG 27GL850-B Monitor Review

Tested using Methodology v1.1
Updated May 01, 2020 at 10:29 am
LG 27GL850-B Picture
7.8
Mixed Usage
7.8
Office
8.2
Gaming
7.7
Multimedia
7.8
Media Creation
6.8
HDR Gaming
Size 27"
Resolution 2560x1440
Max Refresh Rate
144 Hz
Pixel Type
IPS
Variable Refresh Rate
FreeSync

The LG UltraGear 27GL850-B is a very good 1440p monitor. It has an outstanding response time, quicker than most 144Hz monitors we've seen so far. This results in exceptionally clear motion in any scene, with almost no blur behind fast-moving objects. It also has outstanding low input lag for a responsive gaming experience. This monitor supports AMD's FreeSync variable refresh rate (VRR) technology, and it's also NVIDIA certified as G-SYNC compatible, so VRR works automatically with recent NVIDIA graphics cards. Unfortunately, like almost all IPS monitors, it doesn't look as good in dark rooms, as it has a disappointing contrast ratio and poor black uniformity.

Our Verdict

7.8 Mixed Usage

The LG 27GL850-B is a very good monitor for pretty much any use. It's a great gaming monitor, with outstanding response time and extremely low input lag. It has wide viewing angles, good peak brightness, and good reflection handling, great for office use or watching videos with a few friends. It delivers a decent HDR gaming experience, but it's limited by its low native contrast and poor black uniformity.

Pros
  • Outstanding response time.
  • Wide viewing angles.
  • Excellent low input lag.
Cons
  • Disappointing contrast ratio and poor black uniformity.
  • Limited ergonomics.
7.8 Office

The LG 27GL850-B is a good monitor for office use. It has wide viewing angles, good peak brightness, and good reflection handling. It has a decent height and tilt adjustment, but it can't swivel, which might be an issue for some people. However, it has excellent gray uniformity, which is important for browsing the web or opening documents.

8.2 Gaming

The LG 27GL850-B is a great monitor for gaming. It has outstanding low input lag, a great resolution and size, and outstanding response time. It supports FreeSync, and is NVIDIA G-SYNC compatible, and it has a flicker-free backlight. Unfortunately, it has disappointing ergonomics, and it doesn't look as good in a dark room due to its low contrast ratio and poor black uniformity.

7.7 Multimedia

Overall, the LG 27GL850-B is a good monitor for multimedia. It has a great resolution and size, and wide viewing angles, so it's well-suited for sharing videos with your friends. Unfortunately, like most IPS monitors, it doesn't look quite as good in a dark room, as it has a disappointing contrast ratio and poor black uniformity.

7.8 Media Creation

Good monitor for media creation. The 27GL850-B has a great resolution and size, so you can see more of your work at once. It has great viewing angles, good peak brightness, and decent reflection handling. This monitor also has outstanding low input lag for a responsive desktop experience. Unfortunately, it doesn't look as good in a dark room, as it has poor black uniformity.

6.8 HDR Gaming

The 27GL850-B is decent for gaming in HDR, mainly due to the great gaming performance. It has a very low input lag and an outstanding response time, so fast-moving objects are extremely clear, with almost no blur behind them. It can display a wide color gamut in HDR, but unfortunately, it can't get bright enough to bring out highlights.

  • 7.8 Mixed Usage
  • 7.8 Office
  • 8.2 Gaming
  • 7.7 Multimedia
  • 7.8 Media Creation
  • 6.8 HDR Gaming
  1. Update 6/4/2020: We retested FreeSync over HDMI, and updated our results below.
  2. Update 2/17/2020: Converted to Test Bench 1.1.

Video

Test Results

Design
Design
Style
Curved No
Curve Radius Not Curved
Weight (without stand)
9.0 lbs (4.1 kg)
Weight (with stand)
13.2 lbs (6.0 kg)

The 27GL850 has the same look as most other LG UltraGear monitors. It's mainly black with a red circle on the back, but it doesn't illuminate like the 32GK850G.

Design
Stand
Width
18.9" (48.0 cm)
Depth
9.4" (23.9 cm)

Like the 27GL650F, the stand supports the monitor well but still wobbles a bit.

5.9
Design
Ergonomics
Height Adjustment
4.3" (10.9 cm)
Switch Portrait/Landscape Yes, Clockwise
Swivel Range N/A
Tilt Range -15° to 5°

This monitor has disappointing ergonomics. It has a decent height adjustment and it can rotate to portrait orientation, but its tilt range is limited and it can't swivel.

Design
Back
Wall Mount VESA 100x100

The back of the monitor is very similar to other UltraGear monitors. There's a quick-release on the stand, but only very basic cable management through a clip attached to the stand.

Design
Borders
Borders
0.4" (1.0 cm)

The bezels are very thin on three sides, and they aren't very distracting.

Design
Thickness
Thickness (with stand)
6.5" (16.5 cm)
Thickness (without stand)
2.2" (5.6 cm)

The display portion of the 27GL850 is thin, and looks great VESA-mounted. Even when mounted on the stand, the setup doesn't stick out much.

7.0
Design
Build Quality

The 27GL850 has decent overall build quality. The outer casing is almost entirely made of plastic, but there aren't any obvious points of concern.

Picture Quality
5.5
Picture Quality
Contrast
Native Contrast
735 : 1
Contrast With Local Dimming
N/A

The 27GL850-B has a disappointing contrast ratio. Although IPS monitors usually have low contrast, this is worse than most, and blacks appear gray when viewed in the dark. If you're looking for a similar monitor but with a VA panel, displaying deeper blacks, then check out the AOC CQ27G1.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

This monitor doesn't have a local dimming feature. The above video is provided for reference only.

7.8
Picture Quality
SDR Peak Brightness
SDR Real Scene
315 cd/m²
SDR Peak 2% Window
346 cd/m²
SDR Peak 10% Window
346 cd/m²
SDR Peak 25% Window
346 cd/m²
SDR Peak 50% Window
347 cd/m²
SDR Peak 100% Window
347 cd/m²
SDR Sustained 2% Window
346 cd/m²
SDR Sustained 10% Window
346 cd/m²
SDR Sustained 25% Window
346 cd/m²
SDR Sustained 50% Window
346 cd/m²
SDR Sustained 100% Window
347 cd/m²
SDR ABL
0.000

Good SDR peak brightness. It remains consistent with different content and there shouldn't be any issues overcoming glare in a bright room.

6.4
Picture Quality
HDR Peak Brightness
HDR Real Scene
341 cd/m²
HDR Peak 2% Window
361 cd/m²
HDR Peak 10% Window
362 cd/m²
HDR Peak 25% Window
362 cd/m²
HDR Peak 50% Window
362 cd/m²
HDR Peak 100% Window
391 cd/m²
HDR Sustained 2% Window
322 cd/m²
HDR Sustained 10% Window
313 cd/m²
HDR Sustained 25% Window
306 cd/m²
HDR Sustained 50% Window
316 cd/m²
HDR Sustained 100% Window
361 cd/m²
HDR ABL
0.010

Unfortunately, the 27GL850 has mediocre HDR peak brightness. It can't get bright enough to show off small, bright highlights in HDR content.

Note: While trying to measure the HDR real scene peak brightness, we encountered a bug, and the monitor started to flicker. We don't know why this happened, and we didn't encounter it with our other HDR tests.

8.4
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
45 °
Color Washout From Right
45 °
Color Shift From Left
51 °
Color Shift From Right
51 °
Brightness Loss From Left
48 °
Brightness Loss From Right
50 °
Black Level Raise From Left
70 °
Black Level Raise From Right
70 °
Gamma Shift From Left
58 °
Gamma Shift From Right
55 °

The 27GL850 has great horizontal viewing angles, which is expected from an IPS panel monitor. The image remains accurate when viewed from the side.

6.8
Picture Quality
Vertical Viewing Angle
Color Washout From Below
32 °
Color Washout From Above
33 °
Color Shift From Below
33 °
Color Shift From Above
39 °
Brightness Loss From Below
37 °
Brightness Loss From Above
39 °
Black Level Raise From Below
70 °
Black Level Raise From Above
41 °
Gamma Shift From Below
31 °
Gamma Shift From Above
31 °

Decent vertical viewing angle. The edges of the screen are darker if you sit close to it and you lose image accuracy if the monitor is mounted above or below eye level.

8.5
Picture Quality
Gray Uniformity
50% Std. Dev.
3.149 %
50% DSE
0.120 %
5% Std. Dev.
0.382 %
5% DSE
0.060 %

Excellent gray uniformity. There's some very slight vignetting, and a bit of dirty screen effect in the center, but neither of these are very noticeable with normal content.

4.8
Picture Quality
Black Uniformity
Native Std. Dev.
2.831 %
Std. Dev. w/ L.D.
N/A

Unfortunately, this monitor has poor black uniformity. There's noticeable backlight bleed and clouding throughout. This might vary between units, so let us know if you get a unit with better black uniformity.

7.4
Picture Quality
Pre Calibration
Picture Mode
Srgb
Luminance
182 cd/m²
Luminance Settings
100
Contrast Setting
70
RGB Controls
Custom (50-50-50)
Gamma Setting
Mode 2
Color Temperature
6442 K
White Balance dE
3.57
Color dE
2.46
Gamma
2.15

The 27GL850-B has okay out-of-the-box color accuracy. There are a few noticeable color errors and the color temperature is extremely close to the 6500K target. Gamma doesn't follow the target curve well, though, so most scenes aren't displayed at the proper brightness.

9.6
Picture Quality
Post Calibration
Picture Mode
Gamer 1
Luminance
99 cd/m²
Luminance Settings
14
Contrast Setting
68
RGB Controls
50-50-50
Gamma Setting
Mode 2
Color Temperature
6438 K
White Balance dE
0.53
Color dE
0.62
Gamma
2.17

After calibration, this monitor has outstanding accuracy. Colors are displayed almost perfectly, and any remaining inaccuracies aren't noticeable.

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
Picture Quality
SDR Color Gamut
sRGB xy
99.6 %
Adobe RGB xy
84.2 %
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

This monitor has an outstanding SDR color gamut. It can display the entire sRGB color space used in most content. It also has impressive coverage of the wider Adobe RGB color space, great for professional photo editing.

9.3
Picture Quality
SDR Color Volume
sRGB In ICtCp
97.1 %
Adobe RGB In ICtCp
88.9 %
sRGB Picture Mode
Gamer 1
Adobe RGB Picture Mode
Gamer 1

Outstanding SDR color volume. It's mainly limited by the disappointing contrast ratio, as it can't display dark, saturated colors very well.

7.3
Picture Quality
HDR Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
77.8 %
Rec. 2020 xy
68.4 %
DCI P3 Picture Mode
Gamer 1
Rec. 2020 Picture Mode
Gamer 1

The 27GL850 has a decent HDR color gamut. It has good coverage of the DCI P3 color space used in most HDR content but limited coverage of the wider Rec. 2020 color space.

6.8
Picture Quality
HDR Color Volume
DCI-P3 In ICtCp
75.5 %
Rec. 2020 In ICtCp
61.1 %
DCI P3 Picture Mode
Gamer 1
Rec. 2020 Picture Mode
Gamer 1

Decent HDR color volume. It's limited by the low native contrast, as it can't display the full range of colors, and can't display dark, saturated colors very well.

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 on the 27GL850, even immediately after displaying our high-contrast, static test image for 10 minutes.

9.7
Picture Quality
Gradient
Color Depth
10 Bit

The 27GL850 has outstanding gradient handling. Any banding isn't noticeable with most content.

9.8
Picture Quality
Color Bleed
Pixel Row Error
0.001 %
Pixel Column Error
0.048 %

There's some extremely minor vertical color bleed, but this isn't at all noticeable with regular content.

7.7
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
4.8 %
Indirect Reflections
2.7 %
Calculated Direct Reflections
2.1 %

The 27GL850 has good reflection handling. It performs best in rooms with moderate amounts of light, such as most office environments.

7.0
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

Text clarity is okay. It can be improved by using ClearType (top photo), which makes the diagonal lines on the letters R and N clearer.

Motion
9.3
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Fast
Rise / Fall Time
3.5 ms
Total Response Time
8.3 ms
Overshoot Error
5.4 %
Dark Rise / Fall Time
3.5 ms
Dark Total Response Time
8.7 ms
Dark Overshoot Error
7.8 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Normal Chart Table Photo
Fast Chart Table Photo
Faster Chart Table Photo

The 27GL850 has an outstanding response time at its max refresh rate of 144Hz. The recommended Overdrive setting is 'Fast' as it has the least amount of motion blur, but there's still some overshoot in darker transitions. If that bothers you, the 'Normal' setting performs very similarly, but the response time is slower in all transitions, resulting in a bit more blur.

9.2
Motion
Response Time @ 60Hz
Best Overdrive Setting
Normal
Rise / Fall Time
4.4 ms
Total Response Time
9.6 ms
Overshoot Error
1.3 %
Dark Rise / Fall Time
4.4 ms
Dark Total Response Time
11.9 ms
Dark Overshoot Error
3.0 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Normal Chart Table Photo
Fast Chart Table Photo
Faster Chart Table Photo

Incredible response time at 60Hz, better than most 144Hz monitors, which is great news for console gamers. Unlike the Overdrive setting at its max refresh rate, the recommended setting is 'Normal'. It has significantly less overshoot than the 'Fast' and 'Faster' settings and motion looks the clearest.

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

The backlight is flicker-free, which helps reduce eye strain.

Note: We encountered a bug while testing the HDR real scene peak brightness that caused the screen to start flickering at 60Hz. We don't know why this happened, and we didn't notice it at any other time.

0
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
No BFI
BFI Maximum Frequency
N/A
BFI Minimum Frequency
N/A

There's no optional black frame insertion feature on the 27GL850. If you want something similar with a BFI feature, look into the ASUS TUF Gaming VG27AQL1A.

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 27GL850 has an excellent 144Hz refresh rate. It supports AMD's FreeSync variable refresh rate technology, but it's also certified by NVIDIA as G-SYNC compatible, so it works automatically with a recent NVIDIA graphics card.

Over HDMI, the 27GL850 only supports FreeSync up to 100Hz.

If you're looking for a similar monitor with a 165Hz refresh rate, then check out the ViewSonic Elite XG270QG.

Inputs
9.5
Inputs
Input Lag
Native Resolution
4.3 ms
Native Resolution @ 60Hz
14.0 ms
Variable Refresh Rate
4.7 ms
Variable Refresh Rate @ 60Hz
13.2 ms
10 Bit HDR
4.3 ms
Black Frame Insertion (BFI)
N/A

Outstanding low input lag, even with FreeSync enabled or in HDR. The 60Hz input lag is higher, though, which might disappoint console gamers.

8.3
Inputs
Resolution And Size
Native Resolution 2560 x 1440
Aspect Ratio 16:9
Megapixels 3.7 MP
Pixel Density
109 PPI
Screen Diagonal 27.0 inches
Screen Area 311 sq inches

The 1440p, 27 inch screen delivers a great amount of screen real estate, and is great for multitasking. This also provides an immersive gaming experience, allowing you to see more fine details.