Products
LG 27GN650-B
Samsung Odyssey G4/G40B S27BG40
Tested using Methodology v1.1
Updated Jun 07, 2024 06:18 PM
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LG.com
Tested using Methodology v1.2
Updated Aug 28, 2025 04:58 PM
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BestBuy.com
Max Refresh Rate
144 Hz
Size
27"
Pixel Type
IPS
Variable Refresh Rate
Adaptive Sync
HDR10
Yes
Native Resolution
1920 x 1080
Max Refresh Rate
240 Hz
Size
27"
Pixel Type
IPS
Variable Refresh Rate
Yes
HDR10
Yes
Native Resolution
1920 x 1080
Our Verdict
LG 27GN650-B
Samsung Odyssey G4/G40B S27BG40
The LG 27GN650-B and the Samsung Odyssey G4/G40B S27BG40 are both very good gaming monitors with a few differences. Even though the LG has a slower 144Hz refresh rate, it has better motion handling due to its quicker response times. However, the Samsung is better to use in well-lit rooms because it gets much brighter. It also has better ergonomics that make it easier to adjust to an ideal viewing position.
Variants
- 27GN650-B (27")
- LS27BG402ENXGO (27")
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27"
27GN650-B
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LG.com
27"
LS27BG402ENXGO
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27"
27GN650-B
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27"
LS27BG402ENXGO
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27"
27GN650-B
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27"
LS27BG402ENXGO
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27"
27GN650-B
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27"
LS27BG402ENXGO
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27"
27GN650-B
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27"
LS27BG402ENXGO
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.6
7.3
Ergonomics
5.9
8.6
Resolution And Size
7.1
6.5
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Size
27"
27"
Weight (without stand)
11.0 lbs (5.0 kg)
7.8 lbs (3.5 kg)
Weight (with stand)
15.9 lbs (7.2 kg)
11.7 lbs (5.3 kg)
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.0
7.0
Build Quality Picture
Ergonomics
5.9
8.6
Ergonomics Picture
Back Picture
Height Adjustment
4.3" (11.0 cm)
4.7" (12.0 cm)
Tilt Range
-15° to 5°
-22.5° to 2.5°
Rotate Portrait/Landscape
Yes, Clockwise
Yes, Both Ways
Swivel Range
No swivel
-15° to 15°
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
16.7" (42.5 cm)
17.8" (45.1 cm)
Base Depth
11.7" (29.8 cm)
9.1" (23.0 cm)
Thickness (With Display)
8.9" (22.6 cm)
6.7" (17.1 cm)
Weight (With Display)
15.9 lbs (7.2 kg)
11.7 lbs (5.3 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.3" (61.7 cm)
Housing Height
14.9" (37.8 cm)
Thickness (Without Stand)
2.2" (5.7 cm)
2.2" (5.7 cm)
Weight (Without Stand)
11.0 lbs (5.0 kg)
7.8 lbs (3.5 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.4" (0.9 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
External Brick
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.8 cm)
0.4" (0.9 cm)
Thickness
Thickness Picture
Thickness (with stand)
8.9" (22.6 cm)
6.7" (17.1 cm)
Thickness (without stand)
2.2" (5.7 cm)
2.2" (5.7 cm)
Picture Quality
Contrast
6.0
6.0
Checkerboard Picture
Native Contrast
1,002 : 1
1,006 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Edge
SDR Brightness
7.2
8.0
Real Scene
270 cd/m²
356 cd/m²
Peak 2% Window
283 cd/m²
357 cd/m²
Peak 10% Window
284 cd/m²
361 cd/m²
Peak 25% Window
284 cd/m²
362 cd/m²
Peak 50% Window
285 cd/m²
362 cd/m²
Peak 100% Window
285 cd/m²
362 cd/m²
Sustained 2% Window
282 cd/m²
357 cd/m²
Sustained 10% Window
284 cd/m²
361 cd/m²
Sustained 25% Window
284 cd/m²
362 cd/m²
Sustained 50% Window
284 cd/m²
362 cd/m²
Sustained 100% Window
284 cd/m²
362 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Minimum Brightness
57 cd/m²
HDR Brightness
6.4
6.6
EOTF
VESA DisplayHDR Certification
No Certification
Real Scene
347 cd/m²
386 cd/m²
Peak 2% Window
361 cd/m²
389 cd/m²
Peak 10% Window
362 cd/m²
393 cd/m²
Peak 25% Window
362 cd/m²
393 cd/m²
Peak 50% Window
363 cd/m²
394 cd/m²
Peak 100% Window
363 cd/m²
394 cd/m²
Sustained 2% Window
361 cd/m²
388 cd/m²
Sustained 10% Window
361 cd/m²
392 cd/m²
Sustained 25% Window
362 cd/m²
392 cd/m²
Sustained 50% Window
362 cd/m²
393 cd/m²
Sustained 100% Window
362 cd/m²
393 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Horizontal Viewing Angle
8.3
8.3
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
44°
45°
Color Washout From Right
46°
44°
Horizontal Hue Graph
Color Shift From Left
50°
49°
Color Shift From Right
51°
52°
Horizontal Lightness Graph
Brightness Loss From Left
47°
47°
Brightness Loss From Right
49°
47°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
70°
Gamma Shift From Left
56°
57°
Gamma Shift From Right
56°
56°
Vertical Viewing Angle
6.4
6.2
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
33°
31°
Color Washout From Above
35°
31°
Vertical Hue Graph
Color Shift From Below
30°
22°
Color Shift From Above
33°
35°
Vertical Lightness Graph
Brightness Loss From Below
39°
37°
Brightness Loss From Above
42°
36°
Black Level Raise From Below
40°
21°
Black Level Raise From Above
22°
47°
Gamma Shift From Below
32°
30°
Gamma Shift From Above
34°
32°
Gray Uniformity
8.7
8.1
50% Uniformity Picture
50% Std. Dev.
3.000%
3.133%
50% DSE
0.104%
0.138%
5% Uniformity Picture
5% Std. Dev.
0.551%
5% DSE
0.051%
Black Uniformity
3.4
2.7
Native Black Uniformity Picture
Native Std. Dev.
3.745%
4.228%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
8.0
7.7
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Gamer 1
sRGB
sRGB Gamut Area xy
104.1%
White Balance dE (Avg.)
2.69
5.14
Color Temperature (Avg.)
6,546 K
7,739 K
Gamma (Avg.)
2.16
2.18
Color dE (Avg.)
2.37
3.19
Contrast Setting
70
N/A
RGB Settings
50-50-50
Default
Gamma Setting
Mode 2
Mode 1
Brightness Setting
100
100
Measured Brightness
285 cd/m²
392 cd/m²
Brightness Locked
No
Color Accuracy (Post-Calibration)
9.6
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Gamer 1
Custom
sRGB Gamut Area xy
101.2%
White Balance dE (Avg.)
0.85
0.65
Color Temperature (Avg.)
6,471 K
6,477 K
Gamma (Avg.)
2.18
2.17
Color dE (Avg.)
0.46
0.40
Contrast Setting
70
70
RGB Settings
49-49-52
55-52-44
Gamma Setting
Mode 2
Mode 1
Brightness Setting
46
14
Measured Brightness
100 cd/m²
99 cd/m²
ICC Profile
SDR Color Gamut
9.1
9.3
sRGB Color Gamut Picture
sRGB Coverage xy
100.0%
99.9%
sRGB Picture Mode
Gamer 1
Custom
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
82.2%
78.3%
Adobe RGB Picture Mode
Gamer 1
Custom
SDR Color Volume
9.3
9.4
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.9%
97.1%
sRGB Picture Mode
Gamer 1
Custom
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
87.7%
82.8%
Adobe RGB Picture Mode
Gamer 1
Custom
HDR Color Gamut
7.7
6.8
Wide Color Gamut
Yes
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
82.3%
DCI-P3 Picture Mode
Gamer 2
Custom
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
64.1%
59.4%
Rec. 2020 Picture Mode
Gamer 2
Custom
DCI P3 xy
88.8%
HDR Color Volume
6.8
6.2
DCI-P3 Color Volume ITP Picture
DCI-P3 In ICtCp
78.7%
63.0%
DCI-P3 Picture Mode
Gamer 2
Custom
Rec. 2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
56.4%
53.2%
Rec. 2020 Picture Mode
Gamer 2
Custom
Image Retention
10
Image Retention Picture
IR After 0 Min Recovery
0.00%
IR After 2 Min Recovery
0.00%
IR After 4 Min Recovery
0.03%
IR After 6 Min Recovery
0.00%
IR After 8 Min Recovery
0.00%
IR After 10 Min Recovery
0.03%
Reflections
7.5
8.3
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
5.2%
4.4%
Indirect Reflections
2.8%
3.7%
Calculated Direct Reflections
2.4%
0.7%
Text Clarity
7.0
7.0
ClearType On
ClearType Off
Pixel Type
IPS
IPS
Pixels
Subpixel Layout
RGB
RGB
Gradient
9.7
9.5
Gradient Picture
Color Depth
10 Bit
10 Bit
Color Bleed
9.9
Color Bleed Horizontal
Pixel Row Error
0.000%
Color Bleed Vertical
Pixel Column Error
0.027%
Motion
Refresh Rate
9.0
Native Refresh Rate
144 Hz
240 Hz
Max Refresh Rate
144 Hz
240 Hz
Max Refresh Rate Over DP
240 Hz
Max Refresh Rate Over HDMI
240 Hz
Max Refresh Rate Over DP @ 10-bit
240 Hz
Max Refresh Rate Over HDMI @ 10-Bit
120 Hz
Variable Refresh Rate (VRR)
FreeSync
Yes
Yes
G-SYNC
Compatible (NVIDIA Certified)
Compatible (NVIDIA Certified)
VRR Maximum
144 Hz
240 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
Variable Refresh Rate
Adaptive Sync
Yes
Native
144 Hz
240 Hz
Max Refresh Rate
144 Hz
240 Hz
Variable Refresh Rate
Yes
Response Time @ Max Refresh Rate
9.4
7.9
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Adaptive Sync
Rise / Fall Time
4.1 ms
6.0 ms
Total Response Time
7.3 ms
10.7 ms
Overshoot Error
1.9%
0.0%
Worst 3 Rise / Fall Time
4.2 ms
8.9 ms
Worst 3 Total Response Time
7.6 ms
15.2 ms
Worst 3 Overshoot Error
2.1%
0.0%
Response Time @ 120Hz
7.7
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Adaptive Sync
Rise / Fall Time
6.2 ms
Total Response Time
11.3 ms
Overshoot Error
0.0%
Worst 3 Rise / Fall Time
9.0 ms
Worst 3 Total Response Time
16.5 ms
Worst 3 Overshoot Error
0.0%
Response Time @ 60Hz
8.6
7.4
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Off
Adaptive Sync
Rise / Fall Time
5.6 ms
6.1 ms
Total Response Time
13.3 ms
14.4 ms
Overshoot Error
0%
0.0%
Worst 3 Rise / Fall Time
5.9 ms
9.0 ms
Worst 3 Total Response Time
12.2 ms
18.0 ms
Worst 3 Overshoot Error
0.0%
0.0%
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
Yes
Yes
Maximum Frequency
144 Hz
240 Hz
Minimum Frequency
120 Hz
240 Hz
Longest Pulse Width Brightness
271 cd/m²
Shortest Pulse Width Brightness
271 cd/m²
Pulse Width Control
No
Pulse Phase Control
No
Pulse Amplitude Control
No
VRR At The Same Time
No
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Inputs
Input Lag
9.5
9.0
Native Resolution @ Max Hz
4.1 ms
2.9 ms
Native Resolution @ 120Hz
6.4 ms
Native Resolution @ 60Hz
9.2 ms
14.6 ms
Variable Refresh Rate
4.5 ms
Variable Refresh Rate @ 60Hz
9.8 ms
10 Bit HDR
4.1 ms
Backlight Strobing (BFI)
9.3 ms
3.0 ms
Resolution And Size
7.1
6.5
Native Resolution
1920 x 1080
1920 x 1080
Aspect Ratio
16:9
16:9
Megapixels
2.1 MP
2.1 MP
Pixel Density
82 PPI
81 PPI
Measured Screen Diagonal
27.0"
27.0"
Screen Area
310 in²
313 in²
PS5 Compatibility
5.0
PS5 Compatibility Photo
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
No
1080p @ 120Hz
Yes
1080p @ 60Hz
Yes
HDR
Yes
VRR
No
Xbox Series X|S Compatibility
5.0
XSX Compatibility Photo
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
Yes
1080p @ 60Hz
Yes
HDR
No
VRR
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.4)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
2 (HDMI 2.0)
HDMI 2.1 Rated Speed
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
3.5mm Audio Out
1
1
HDR10
Yes
Yes
3.5mm Audio In
No
3.5mm Microphone In
No
No
DisplayPort Out
No
USB
1 (USB 3.0)
1 (Service Port Only)
USB C
No
0
Digital Optical Audio Out
No
Analog Audio Out RCA
No
Power Supply
External Brick
External Brick
USB
USB-A Ports
1 (USB 3.0)
1 (Service Port Only)
USB-A Rated Speed
480Mbps (USB 2.0)
USB-B Upstream Port
No
USB-C Ports
No
0
USB-C Upstream
No USB-C Ports
USB-C Rated Speed
No USB-C Ports
USB-C Power Delivery
No USB-C Ports
USB-C DisplayPort Alt Mode
No USB-C Ports
Thunderbolt
No
macOS Compatibility
macOS Screenshot
Features
Additional Features
Speakers
No
No
RGB Illumination
No
No
Multiple Input Display
No
No
KVM Switch
No
HDR10
Yes
Yes
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
27"
27GN650-B
SEE PRICE
LG.com
27"
LS27BG402ENXGO
SEE PRICE
BestBuy.com
27"
27GN650-B
SEE PRICE
Amazon.com
27"
LS27BG402ENXGO
SEARCH
Amazon.com
27"
27GN650-B
SEE PRICE
BestBuy.com
27"
LS27BG402ENXGO
SEARCH
B&H
27"
27GN650-B
SEE PRICE
Walmart.com
27"
LS27BG402ENXGO
SEARCH
Samsung.com
27"
27GN650-B
SEARCH
B&H
27"
LS27BG402ENXGO
SEARCH
Walmart.com
LG 27GN650-B
Samsung Odyssey G4/G40B S27BG40
Comments
LG 27GN650-B vs Samsung Odyssey G4/G40B S27BG40: Main Discussion
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