Products
LG 27GN850-B/27GN880-B
Dell S2721DGF
Tested using Methodology v1.2
Updated Aug 07, 2024 02:15 PM
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Amazon.com
Tested using Methodology v1.2
Updated Aug 28, 2025 04:57 PM
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Amazon.com
Max Refresh Rate
144 Hz
Size
27"
Pixel Type
IPS
Variable Refresh Rate
Yes
HDR10
Yes
Native Resolution
2560 x 1440
Max Refresh Rate
165 Hz
Size
27"
Pixel Type
IPS
Variable Refresh Rate
Yes
HDR10
Yes
Native Resolution
2560 x 1440
Our Verdict
LG 27GN850-B/27GN880-B
Dell S2721DGF
The Dell S2721DGF is a bit better overall than the LG 27GN850-B/27GN880-B, but the two monitors are very similar. The Dell has a max refresh rate of 165Hz, as opposed to the LG's 144Hz, and this results in a slightly quicker response time. It also has much better ergonomics, making it a better choice for office use, and it gets brighter. On the other hand, the LG has much better out-of-the-box accuracy, so you may not need to get it calibrated.
Variants
- 27GN850-B (27")
- 27GN880-B (27")
- S2721DGF (27")
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27"
27GN850-B
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27"
S2721DGF
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27"
27GN880-B
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27"
S2721DGF
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S2721DGF
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.7
7.7
Ergonomics
7.1
9.2
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.0
8.0
Build Quality Picture
Ergonomics
7.1
9.2
Ergonomics Picture
Back Picture
Height Adjustment
4.3" (11.0 cm)
5.1" (13.0 cm)
Tilt Range
-15° to 5°
-20° to 5°
Rotate Portrait/Landscape
Yes, Clockwise
Yes, Both Ways
Swivel Range
No swivel
-45° to 45°
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
16.7" (42.5 cm)
10.9" (27.6 cm)
Base Depth
11.6" (29.4 cm)
7.9" (20.0 cm)
Thickness (With Display)
8.7" (22.2 cm)
6.3" (16.0 cm)
Weight (With Display)
13.9 lbs (6.3 kg)
14.6 lbs (6.6 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.2" (61.5 cm)
24.1" (61.2 cm)
Housing Height
14.4" (36.5 cm)
14.2" (36.1 cm)
Thickness (Without Stand)
2.0" (5.2 cm)
2.6" (6.5 cm)
Weight (Without Stand)
9.3 lbs (4.2 kg)
9.9 lbs (4.5 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.3" (0.7 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
Internal
Picture Quality
Contrast
5.7
5.8
Checkerboard Picture
Native Contrast
852 : 1
882 : 1
Contrast With Local Dimming
N/A
971 : 1
Local Dimming
0.0
1.0
Local Dimming Video
Local Dimming
No
Yes
Backlight
Edge
Edge
SDR Brightness
7.7
8.0
Real Scene
321 cd/m²
341 cd/m²
Peak 2% Window
320 cd/m²
364 cd/m²
Peak 10% Window
322 cd/m²
367 cd/m²
Peak 25% Window
322 cd/m²
368 cd/m²
Peak 50% Window
322 cd/m²
368 cd/m²
Peak 100% Window
322 cd/m²
368 cd/m²
Sustained 2% Window
320 cd/m²
364 cd/m²
Sustained 10% Window
322 cd/m²
367 cd/m²
Sustained 25% Window
322 cd/m²
368 cd/m²
Sustained 50% Window
322 cd/m²
368 cd/m²
Sustained 100% Window
322 cd/m²
368 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Minimum Brightness
55 cd/m²
35 cd/m²
HDR Brightness
6.2
6.6
EOTF
VESA DisplayHDR Certification
No Certification
DisplayHDR 400 - 1.0/1.1
Real Scene
325 cd/m²
328 cd/m²
Peak 2% Window
325 cd/m²
481 cd/m²
Peak 10% Window
326 cd/m²
485 cd/m²
Peak 25% Window
326 cd/m²
486 cd/m²
Peak 50% Window
326 cd/m²
487 cd/m²
Peak 100% Window
351 cd/m²
487 cd/m²
Sustained 2% Window
296 cd/m²
480 cd/m²
Sustained 10% Window
301 cd/m²
484 cd/m²
Sustained 25% Window
302 cd/m²
484 cd/m²
Sustained 50% Window
305 cd/m²
486 cd/m²
Sustained 100% Window
325 cd/m²
486 cd/m²
Automatic Brightness Limiting (ABL)
0.005
0.003
Horizontal Viewing Angle
8.5
8.5
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
46°
46°
Color Washout From Right
46°
47°
Horizontal Hue Graph
Color Shift From Left
55°
52°
Color Shift From Right
55°
55°
Horizontal Lightness Graph
Brightness Loss From Left
49°
48°
Brightness Loss From Right
49°
49°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
70°
Gamma Shift From Left
61°
60°
Gamma Shift From Right
59°
61°
Vertical Viewing Angle
6.4
6.2
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
34°
32°
Color Washout From Above
34°
33°
Vertical Hue Graph
Color Shift From Below
31°
31°
Color Shift From Above
37°
34°
Vertical Lightness Graph
Brightness Loss From Below
39°
36°
Brightness Loss From Above
39°
37°
Black Level Raise From Below
33°
32°
Black Level Raise From Above
28°
22°
Gamma Shift From Below
33°
30°
Gamma Shift From Above
33°
30°
Gray Uniformity
8.1
8.0
50% Uniformity Picture
50% Std. Dev.
3.109%
3.975%
50% DSE
0.137%
0.132%
Black Uniformity
5.5
3.9
Native Black Uniformity Picture
Native Std. Dev.
2.337%
2.946%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
7.261%
Color Accuracy (Pre-Calibration)
8.1
5.9
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
sRGB
Standard
sRGB Gamut Area xy
99.5%
137.7%
White Balance dE (Avg.)
4.91
3.43
Color Temperature (Avg.)
7,183 K
6,929 K
Gamma (Avg.)
2.13
2.13
Color dE (Avg.)
2.85
3.55
Contrast Setting
N/A
75
RGB Settings
Default
Default
Gamma Setting
Default
No Gamma Setting
Brightness Setting
50
75
Measured Brightness
181 cd/m²
223 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.6
9.8
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Gamer 1
Custom Color
sRGB Gamut Area xy
102.6%
100.7%
White Balance dE (Avg.)
0.52
0.54
Color Temperature (Avg.)
6,475 K
6,504 K
Gamma (Avg.)
2.18
2.17
Color dE (Avg.)
0.59
0.34
Contrast Setting
70
73
RGB Settings
50-48-45
100-96-97
Gamma Setting
Mode 2
No Gamma Setting
Brightness Setting
15
30
Measured Brightness
101 cd/m²
99 cd/m²
SDR Color Gamut
9.6
9.4
sRGB Color Gamut Picture
sRGB Coverage xy
99.8%
99.6%
sRGB Picture Mode
Gamer 1
Custom Color
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
88.8%
84.5%
Adobe RGB Picture Mode
Gamer 1
Custom Color
SDR Color Volume
9.7
9.6
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.5%
97.5%
sRGB Picture Mode
Gamer 1
Custom Color
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
92.8%
89.5%
Adobe RGB Picture Mode
Gamer 1
Custom Color
HDR Color Gamut
8.8
9.1
Wide Color Gamut
Yes
Yes
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
95.5%
97.2%
DCI-P3 Picture Mode
Gamer 2
Desktop
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
70.0%
72.8%
Rec. 2020 Picture Mode
Gamer 2
Desktop
HDR Color Volume
7.7
8.8
DCI-P3 Color Volume ITP Picture
DCI-P3 In ICtCp
78.3%
89.8%
DCI-P3 Picture Mode
Gamer 2
Desktop
Rec. 2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
62.7%
71.0%
Rec. 2020 Picture Mode
Gamer 2
Desktop
Reflections
7.4
8.1
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
5.2%
4.4%
Indirect Reflections
2.7%
3.0%
Calculated Direct Reflections
2.5%
1.5%
Text Clarity
7.0
7.5
ClearType On
ClearType Off
Pixel Type
IPS
IPS
Pixels
Subpixel Layout
RGB
RGB
Gradient
9.8
9.7
Gradient Picture
Color Depth
10 Bit
10 Bit
Motion
Refresh Rate
8.3
8.5
Native Refresh Rate
144 Hz
165 Hz
Max Refresh Rate
144 Hz
165 Hz
Max Refresh Rate Over DP
144 Hz
165 Hz
Max Refresh Rate Over HDMI
144 Hz
144 Hz
Max Refresh Rate Over DP @ 10-bit
144 Hz
165 Hz
Max Refresh Rate Over HDMI @ 10-Bit
60 Hz
60 Hz
Variable Refresh Rate (VRR)
FreeSync
Yes
Yes
G-SYNC
Compatible (NVIDIA Certified)
Compatible (NVIDIA Certified)
VRR Maximum
144 Hz
165 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
Variable Refresh Rate
Yes
Yes
Response Time @ Max Refresh Rate
8.8
9.0
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Extreme
Rise / Fall Time
4.2 ms
3.5 ms
Total Response Time
7.8 ms
6.3 ms
Overshoot Error
0.2%
1.9%
Worst 3 Rise / Fall Time
5.5 ms
4.2 ms
Worst 3 Total Response Time
10.7 ms
10.6 ms
Worst 3 Overshoot Error
1.8%
14.7%
Response Time @ 120Hz
8.9
8.8
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Super Fast
Rise / Fall Time
4.2 ms
4.2 ms
Total Response Time
7.5 ms
7.4 ms
Overshoot Error
0.2%
0.6%
Worst 3 Rise / Fall Time
5.4 ms
5.4 ms
Worst 3 Total Response Time
9.4 ms
10.8 ms
Worst 3 Overshoot Error
2.4%
4.8%
Response Time @ 60Hz
8.1
8.0
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Fast
Rise / Fall Time
4.2 ms
4.8 ms
Total Response Time
11.4 ms
11.6 ms
Overshoot Error
1.4%
1.0%
Worst 3 Rise / Fall Time
5.1 ms
6.5 ms
Worst 3 Total Response Time
22.0 ms
20.2 ms
Worst 3 Overshoot Error
8.3%
5.3%
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
No BFI
No BFI
Maximum Frequency
N/A
N/A
Minimum Frequency
N/A
N/A
Longest Pulse Width Brightness
N/A
N/A
Shortest Pulse Width Brightness
N/A
N/A
Pulse Width Control
No BFI
No BFI
Pulse Phase Control
No BFI
No BFI
Pulse Amplitude Control
No BFI
No BFI
VRR At The Same Time
No BFI
No BFI
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
>1000 Hz
Inputs
Input Lag
8.7
9.0
Native Resolution @ Max Hz
4.5 ms
3.7 ms
Native Resolution @ 120Hz
5.2 ms
4.8 ms
Native Resolution @ 60Hz
14.0 ms
11.1 ms
Backlight Strobing (BFI)
N/A
N/A
Resolution And Size
8.0
8.0
Native Resolution
2560 x 1440
2560 x 1440
Aspect Ratio
16:9
16:9
Megapixels
3.7 MP
3.7 MP
Pixel Density
109 PPI
109 PPI
Measured Screen Diagonal
27.0"
27.0"
Screen Area
311 in²
310 in²
PS5 Compatibility
7.0
5.0
PS5 Compatibility Photo
4k @ 120Hz
No
No
4k @ 60Hz
Yes
No
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
Yes
Yes
VRR
No
No
Xbox Series X|S Compatibility
9.2
5.8
XSX Compatibility Photo
4k @ 120Hz
No
No
4k @ 60Hz
Yes
No
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
Yes
No
VRR
Yes
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.4)
1 (DP 1.4)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
2 (HDMI 2.0)
HDMI 2.1 Rated Speed
No HDMI 2.1
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
No
3.5mm Audio Out
1
2
HDR10
Yes
Yes
3.5mm Audio In
No
No
3.5mm Microphone In
No
No
USB
USB-A Ports
0
4
USB-A Rated Speed
No USB-A Ports
5Gbps (USB 3.2 Gen 1)
USB-B Upstream Port
No
Yes
USB-C Ports
0
0
USB-C Upstream
No USB-C Ports
No USB-C Ports
USB-C Rated Speed
No USB-C Ports
No USB-C Ports
USB-C Power Delivery
No USB-C Ports
No USB-C Ports
USB-C DisplayPort Alt Mode
No USB-C Ports
No USB-C Ports
Thunderbolt
No
No
macOS Compatibility
macOS Screenshot
Features
Additional Features
Speakers
No
No
RGB Illumination
No
Fixed (On/Off)
Multiple Input Display
No
No
KVM Switch
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
27GN850-B
SEARCH
Amazon.com
27"
S2721DGF
SEE PRICE
Amazon.com
27"
27GN880-B
SEE PRICE
Amazon.com
27"
S2721DGF
SEE PRICE
Walmart.com
27"
S2721DGF
SEARCH
B&H
27"
S2721DGF
SEARCH
BestBuy.com
LG 27GN850-B/27GN880-B
Dell S2721DGF
Comments
LG 27GN850-B/27GN880-B vs Dell S2721DGF: Main Discussion
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