Notice: Your browser is not supported or outdated so some features of the site might not be available.
- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
LG 27GN800-B vs Samsung Odyssey G55C S27CG55
Side-by-Side Comparison
Products
LG 27GN800-B
Samsung Odyssey G55C S27CG55
Tested using Methodology v1.2
Updated Dec 15, 2023 02:01 PM
SEE PRICE
Amazon.comTested using Methodology v2.0.1
Updated Feb 19, 2025 04:50 PM
SEE PRICE
Amazon.com
Max Refresh Rate144 Hz
Size27"
Pixel TypeIPS
Native Resolution2560 x 1440
Variable Refresh RateYes
HDR10Yes
Max Refresh Rate165 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Variable Refresh RateYes
HDR10Yes
Variants
- 27GN800-B (27")
- LS27CG552ENXZA (27")
Our Verdict
LG 27GN800-B
Samsung Odyssey G55C S27CG55
The LG 27GN800-B and the Samsung Odyssey G5/G55C S27CG55 are both entry-level 1440p gaming monitors, but they have a few differences. Despite having a lower refresh rate than the Samsung monitor, the LG has a faster response time, which is great for playing games with fast-moving objects. The LG also has wider viewing angles, making it ideal for sharing your screen with friends. However, the Samsung monitor has a different panel type with a higher contrast ratio, which is great if you want to watch content or play games in dark rooms.
Check Price
27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.4
Full Comparison
Design
Style
Design Picture
Curved
No
Yes
Curve Radius
Not Curved
1000R
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.0
7.0
Build Quality Picture
Ergonomics
1.5
1.7
Ergonomics Picture
Back Picture
Height Adjustment
0.0" (0.0 cm)
0.0" (0.0 cm)
Min Height To Top Of Panel
N/A
Tilt Range
-15° to 2.5°
-17.5° to 2.5°
Rotate Portrait/Landscape
No
No
Swivel Range
No swivel
No swivel
Wall Mount
VESA 100x100
VESA 75x75
Stand
Stand Picture
Thickness Picture
Base Width
18.6" (47.3 cm)
21.9" (55.5 cm)
Base Depth
9.3" (23.5 cm)
11.2" (28.5 cm)
Thickness (With Display)
6.0" (15.2 cm)
9.3" (23.5 cm)
Weight (With Display)
13.4 lbs (6.1 kg)
9.3 lbs (4.2 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.2" (61.5 cm)
24.2" (61.5 cm)
Housing Height
14.4" (36.5 cm)
15.0" (38.0 cm)
Thickness (Without Stand)
3.0" (7.5 cm)
4.7" (12.0 cm)
Weight (Without Stand)
11.9 lbs (5.4 kg)
8.4 lbs (3.8 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.4" (1.0 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
External Brick
Picture Quality
Contrast
5.7
7.8
Checkerboard Picture
Native Contrast
841 : 1
2,922 : 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
7.6
7.8
Real Scene
304 cd/m²
319 cd/m²
Peak 2% Window
328 cd/m²
334 cd/m²
Peak 10% Window
329 cd/m²
335 cd/m²
Peak 25% Window
329 cd/m²
335 cd/m²
Peak 50% Window
330 cd/m²
335 cd/m²
Peak 100% Window
330 cd/m²
336 cd/m²
Sustained 2% Window
328 cd/m²
334 cd/m²
Sustained 10% Window
329 cd/m²
335 cd/m²
Sustained 25% Window
329 cd/m²
335 cd/m²
Sustained 50% Window
330 cd/m²
335 cd/m²
Sustained 100% Window
329 cd/m²
335 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.000
Minimum Brightness
55 cd/m²
38 cd/m²
HDR Brightness
6.4
6.3
EOTF
VESA DisplayHDR Certification
No Certification
No Certification
Real Scene
346 cd/m²
327 cd/m²
Peak 2% Window
371 cd/m²
342 cd/m²
Peak 10% Window
373 cd/m²
342 cd/m²
Peak 25% Window
372 cd/m²
342 cd/m²
Peak 50% Window
373 cd/m²
342 cd/m²
Peak 100% Window
372 cd/m²
342 cd/m²
Sustained 2% Window
371 cd/m²
342 cd/m²
Sustained 10% Window
372 cd/m²
342 cd/m²
Sustained 25% Window
372 cd/m²
342 cd/m²
Sustained 50% Window
372 cd/m²
342 cd/m²
Sustained 100% Window
372 cd/m²
342 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.000
Horizontal Viewing Angle
8.5
5.3
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
50°
30°
Color Washout From Right
47°
26°
Horizontal Hue Graph
Color Shift From Left
56°
40°
Color Shift From Right
55°
36°
Horizontal Lightness Graph
Brightness Loss From Left
50°
31°
Brightness Loss From Right
49°
28°
Black Level Raise From Left
70°
14°
Black Level Raise From Right
70°
11°
Gamma Shift From Left
58°
15°
Gamma Shift From Right
57°
12°
Vertical Viewing Angle
6.6
4.9
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
31°
25°
Color Washout From Above
31°
25°
Vertical Hue Graph
Color Shift From Below
38°
26°
Color Shift From Above
41°
26°
Vertical Lightness Graph
Brightness Loss From Below
35°
29°
Brightness Loss From Above
37°
29°
Black Level Raise From Below
70°
8°
Black Level Raise From Above
23°
7°
Gamma Shift From Below
31°
14°
Gamma Shift From Above
30°
13°
Gray Uniformity
7.7
8.4
50% Uniformity Picture
50% Std. Dev.
4.072%
1.735%
50% DSE
0.145%
0.141%
Black Uniformity
4.5
3.9
Native Black Uniformity Picture
Native Std. Dev.
3.033%
3.384%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
5.4
8.1
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Gamer 1
Original
sRGB Gamut Area xy
129.7%
101.2%
White Balance dE (Avg.)
5.39
4.39
Color Temperature (Avg.)
6,969 K
7,393 K
Gamma (Avg.)
2.13
2.13
Color dE (Avg.)
4.85
3.02
Contrast Setting
70
50
RGB Settings
50-50-50
0-0-0
Gamma Setting
Mode 2
0
Brightness Setting
59
50
Measured Brightness
195 cd/m²
371 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.7
9.3
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Gamer 1
Original
sRGB Gamut Area xy
100.7%
99.4%
White Balance dE (Avg.)
0.74
0.48
Color Temperature (Avg.)
6,469 K
6,510 K
Gamma (Avg.)
2.17
2.18
Color dE (Avg.)
0.41
2.25
Contrast Setting
70
48
RGB Settings
48-50-47
7-3-(-13)
Gamma Setting
Mode 2
0
Brightness Setting
15
9
Measured Brightness
101 cd/m²
99 cd/m²
SDR Color Gamut
9.6
9.1
sRGB Color Gamut Picture
sRGB Coverage xy
100.0%
99.1%
sRGB Picture Mode
Gamer 1
Original
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
89.4%
76.5%
Adobe RGB Picture Mode
Gamer 1
Original
HDR Color Gamut
8.5
6.1
Wide Color Gamut
Yes
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
93.2%
76.5%
DCI-P3 Picture Mode
Gamer 2
Graphics
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
67.6%
54.8%
Rec. 2020 Picture Mode
Gamer 2
Graphics
HDR Color Volume
7.4
6.1
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
76.4%
46.3%
DCI-P3 Picture Mode
Gamer 2
Graphics
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
57.0%
19.9%
Rec. 2020 Picture Mode
Gamer 2
Graphics
Text Clarity
7.0
7.5
ClearType On
ClearType Off
Pixel Type
IPS
VA
Pixels
Subpixel Layout
RGB
RGB
Reflections
8.2
7.2
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Semi-Gloss
Total Reflections
4.8%
5.8%
Indirect Reflections
4.1%
3.2%
Calculated Direct Reflections
0.7%
2.6%
Gradient
9.8
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
SDR Color Volume
9.6
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.1%
sRGB Picture Mode
Gamer 1
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
91.4%
Adobe RGB Picture Mode
Gamer 1
Motion
Refresh Rate
8.3
7.5
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
120 Hz
Max Refresh Rate Over HDMI @ 10-Bit
60 Hz
60 Hz
Variable Refresh Rate (VRR)
Variable Refresh Rate
Yes
Yes
FreeSync
Yes
Yes
G-SYNC
Compatible (NVIDIA Certified)
Compatible (Tested)
VRR Maximum
144 Hz
165 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
VRR Motion Performance
3.7
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Adaptive-Sync
Variable Overdrive Advertised
No
Avg. CAD
491
Best CAD
460
Worst CAD
542
Refresh Rate Compliance
4.8
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
31%
Compliance @ 120 FPS
40%
Compliance @ 60 FPS
58%
Response Time @ 60Hz
8.1
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Extreme
Rise / Fall Time
3.3 ms
12.6 ms
Total Response Time
13.3 ms
13.8 ms
Overshoot Error
2.9%
2 RGB
Worst 3 Rise / Fall Time
4.1 ms
29.6 ms
Worst 3 Total Response Time
22.6 ms
29.6 ms
Worst 3 Overshoot Error
14.6%
13 RGB
CAD @ Max Refresh Rate
5.3
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD extreme
0 to 31
Recommended Overdrive Setting
Extreme
Avg. CAD
295
Best 10% CAD
91
Worst 10% CAD
680
Response Time @ Max Refresh Rate
First Response Time
3.2 ms
13.2 ms
Total Response Time
6.1 ms
14.4 ms
Recommended Overdrive Setting
Normal
Extreme
Motion Blur Picture
RGB Overshoot
1.1%
2 RGB
Worst 10% RGB Overshoot
8.4%
14 RGB
Worst 10% First Response Time
4.1 ms
33.0 ms
Worst 10% Total Response Time
10.0 ms
33.0 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
Response Time Table
CAD @ 120Hz
5.3
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD extreme
0 to 31
Recommended Overdrive Setting
Extreme
Avg. CAD
299
Best 10% CAD
90
Worst 10% CAD
688
Response Time @ 120Hz
Worst 10% First Response Time
4.1 ms
33.6 ms
RGB Overshoot
1.8%
2 RGB
Total Response Time
7.2 ms
14.5 ms
First Response Time
3.2 ms
13.4 ms
Recommended Overdrive Setting
Normal
Extreme
Worst 10% Total Response Time
12.2 ms
33.6 ms
Worst 10% RGB Overshoot
11.3%
13 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
Motion Blur Picture
Response Time Table
CAD @ 60Hz
5.4
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD extreme
0 to 31
Recommended Overdrive Setting
Extreme
Avg. CAD
290
Best 10% CAD
89
Worst 10% CAD
653
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
Extreme
First Response Time
3.3 ms
12.6 ms
Total Response Time
13.3 ms
13.8 ms
RGB Overshoot
2.9%
2 RGB
Worst 10% Total Response Time
22.6 ms
29.6 ms
Worst 10% First Response Time
4.1 ms
29.6 ms
Worst 10% RGB Overshoot
14.6%
13 RGB
60Hz First Response Heatmap
60Hz Total Response Heatmap
60Hz RGB Overshoot Heatmap
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
Yes
Yes
Maximum Frequency
144 Hz
165 Hz
Minimum Frequency
120 Hz
165 Hz
Longest Pulse Width Brightness
172 cd/m²
120 cd/m²
Shortest Pulse Width Brightness
172 cd/m²
120 cd/m²
Pulse Width Control
No
No
Pulse Phase Control
No
No
Pulse Amplitude Control
Yes
No
VRR At The Same Time
No
No
VRR Flicker
4.0
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
3.3 RGB
Middle Gray Flicker
4.0 RGB
Light Gray Flicker
2.9 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Inputs
Input Lag
8.9
7.6
Native Resolution @ Max Hz
4.0 ms
12.9 ms
Native Resolution @ 120Hz
4.8 ms
5.0 ms
Native Resolution @ 60Hz
8.9 ms
25.4 ms
Backlight Strobing (BFI)
7.4 ms
16.0 ms
Resolution
8.0
7.5
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"
Screen Area
311 in²
PS5 Compatibility
7.0
4.9
PS5 Compatibility Photo
PS5 Compatibility Table
4k @ 120Hz
No
No
4k @ 60Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
Yes
VRR
No
Xbox Series X|S Compatibility
9.2
6.6
XSX Compatibility Photo
XSX Compatibility Table
4k @ 120Hz
No
No
4k @ 60Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
Yes
VRR
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.4)
1 (DP 1.2)
DisplayPort Transmission Bandwidth
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
1 (HDMI 2.0)
HDMI 2.1 Bandwidth
No HDMI 2.1
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
No
3.5mm Audio Out
1
1
HDR10
Yes
Yes
3.5mm Audio In
No
No
3.5mm Microphone In
No
No
USB
USB-A Ports
1 (Service Port Only)
1 (Service Port Only)
USB-A Rated Speed
480Mbps (USB 2.0)
480Mbps (USB 2.0)
USB-B Upstream Port
No
No
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
No
Multiple Input Display
No
No
KVM Switch
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store27"
27GN800-B
Searching
Finding store27"
LS27CG552ENXZA
Searching
Finding store
LG 27GN800-B
Samsung Odyssey G55C S27CG55
Comments
LG 27GN800-B vs Samsung Odyssey G55C S27CG55: Main Discussion
What do you think of these products? Let us know below.
Looking for a personalized buying advice from the RTINGS.com experts? Insiders have direct access to buying advice on our insider forum.