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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
Samsung Odyssey G55A S27AG55 vs Samsung Odyssey G51C S27CG51
Side-by-Side Comparison
Products
Samsung Odyssey G55A S27AG55
Samsung Odyssey G51C S27CG51
Tested using Methodology v2.0.1
Updated Feb 19, 2025 04:47 PM
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Amazon.comTested using Methodology v2.0.1
Updated Feb 19, 2025 04:48 PM
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Amazon.com
Max Refresh Rate165 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Max Refresh Rate165 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Variants
- LS27AG550ENXZA (27")
- LS27CG512ENXZA (27")
Our Verdict
Samsung Odyssey G55A S27AG55
Samsung Odyssey G51C S27CG51
The Samsung Odyssey G5/G51C S27CG51 is a newer model than the Samsung Odyssey G5/G55A S27AG55, with a few improvements. The S27CG51 has a flat screen instead of the curved screen on the S27AG55, and its stand offers much better ergonomics, making it easier to place in an ideal viewing position. The S27CG51 also has a faster response time, but the monitor's motion handling is still limited. On the other hand, the S27AG55 supports DisplayPort 1.4 bandwidth, while the S27CG51 is limited to DisplayPort 1.2 bandwidth, meaning you can reach the S27AG55's max refresh rate even when playing 10-bit games in HDR.
Check Price
27"
LS27AG550ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
LS27AG550ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
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Amazon.comMain Differences for
Threshold
PC Gaming
6.4
6.8
VRR Motion Performance
4.3
6.2
Refresh Rate Compliance
5.3
6.8
Full Comparison
Design
Style
Design Picture
Curved
Yes
No
Curve Radius
1000R
Not Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.0
7.0
Build Quality Picture
Ergonomics
1.7
9.0
Ergonomics Picture
Back Picture
Height Adjustment
0.0" (0.0 cm)
4.7" (11.9 cm)
Min Height To Top Of Panel
N/A
15.3" (38.8 cm)
Tilt Range
-17.5° to 2.5°
-22.5° to 5°
Rotate Portrait/Landscape
No
Yes, Clockwise
Swivel Range
No swivel
-30° to 30°
Wall Mount
VESA 75x75
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
21.7" (55.0 cm)
18.0" (45.8 cm)
Base Depth
10.9" (27.6 cm)
8.6" (21.9 cm)
Thickness (With Display)
9.1" (23.0 cm)
6.5" (16.4 cm)
Weight (With Display)
9.9 lbs (4.5 kg)
10.4 lbs (4.7 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.2" (61.5 cm)
24.3" (61.7 cm)
Housing Height
15.0" (38.2 cm)
15.0" (38.0 cm)
Thickness (Without Stand)
4.1" (10.5 cm)
2.9" (7.4 cm)
Weight (Without Stand)
9.0 lbs (4.1 kg)
7.2 lbs (3.3 kg)
Borders Size (Bezels)
0.4" (1.0 cm)
0.2" (0.6 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
External Brick
Picture Quality
Contrast
7.6
7.7
Checkerboard Picture
Native Contrast
2,521 : 1
2,734 : 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
6.8
6.8
Real Scene
245 cd/m²
242 cd/m²
Peak 2% Window
238 cd/m²
249 cd/m²
Peak 10% Window
257 cd/m²
250 cd/m²
Peak 25% Window
257 cd/m²
250 cd/m²
Peak 50% Window
257 cd/m²
250 cd/m²
Peak 100% Window
257 cd/m²
250 cd/m²
Sustained 2% Window
237 cd/m²
249 cd/m²
Sustained 10% Window
256 cd/m²
250 cd/m²
Sustained 25% Window
257 cd/m²
250 cd/m²
Sustained 50% Window
257 cd/m²
250 cd/m²
Sustained 100% Window
257 cd/m²
249 cd/m²
Automatic Brightness Limiting (ABL)
0.005
0.000
Minimum Brightness
50 cd/m²
42 cd/m²
HDR Brightness
6.0
5.9
EOTF
VESA DisplayHDR Certification
No Certification
No Certification
Real Scene
293 cd/m²
279 cd/m²
Peak 2% Window
283 cd/m²
295 cd/m²
Peak 10% Window
306 cd/m²
296 cd/m²
Peak 25% Window
306 cd/m²
297 cd/m²
Peak 50% Window
306 cd/m²
297 cd/m²
Peak 100% Window
306 cd/m²
297 cd/m²
Sustained 2% Window
283 cd/m²
295 cd/m²
Sustained 10% Window
306 cd/m²
296 cd/m²
Sustained 25% Window
306 cd/m²
296 cd/m²
Sustained 50% Window
306 cd/m²
297 cd/m²
Sustained 100% Window
306 cd/m²
296 cd/m²
Automatic Brightness Limiting (ABL)
0.005
0.000
Horizontal Viewing Angle
5.3
6.3
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
30°
34°
Color Washout From Right
27°
34°
Horizontal Hue Graph
Color Shift From Left
40°
70°
Color Shift From Right
41°
70°
Horizontal Lightness Graph
Brightness Loss From Left
31°
43°
Brightness Loss From Right
28°
43°
Black Level Raise From Left
12°
20°
Black Level Raise From Right
11°
22°
Gamma Shift From Left
14°
11°
Gamma Shift From Right
12°
11°
Vertical Viewing Angle
4.7
5.7
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
24°
26°
Color Washout From Above
26°
28°
Vertical Hue Graph
Color Shift From Below
28°
57°
Color Shift From Above
24°
57°
Vertical Lightness Graph
Brightness Loss From Below
28°
30°
Brightness Loss From Above
29°
32°
Black Level Raise From Below
6°
19°
Black Level Raise From Above
6°
21°
Gamma Shift From Below
13°
11°
Gamma Shift From Above
12°
14°
Gray Uniformity
8.3
8.6
50% Uniformity Picture
50% Std. Dev.
2.082%
1.959%
50% DSE
0.137%
0.122%
Black Uniformity
5.5
8.5
Native Black Uniformity Picture
Native Std. Dev.
2.324%
0.748%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
8.1
6.9
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Custom
Custom
sRGB Gamut Area xy
104.1%
100.5%
White Balance dE (Avg.)
3.72
7.86
Color Temperature (Avg.)
7,103 K
8,063 K
Gamma (Avg.)
2.20
2.16
Color dE (Avg.)
2.76
4.95
Contrast Setting
75
70
RGB Settings
50-50-50
50-50-50
Gamma Setting
Mode 1
Mode 1
Brightness Setting
75
100
Measured Brightness
182 cd/m²
294 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.5
9.0
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom
Custom
sRGB Gamut Area xy
96.9%
99.7%
White Balance dE (Avg.)
0.41
0.58
Color Temperature (Avg.)
6,507 K
6,539 K
Gamma (Avg.)
2.20
2.19
Color dE (Avg.)
0.68
3.61
Contrast Setting
70
70
RGB Settings
50-44-44
42-41-41
Gamma Setting
Mode 1
Mode 3
Brightness Setting
22
24
Measured Brightness
101 cd/m²
100 cd/m²
SDR Color Gamut
8.9
8.6
sRGB Color Gamut Picture
sRGB Coverage xy
96.8%
95.2%
sRGB Picture Mode
Custom
Custom
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
76.1%
75.4%
Adobe RGB Picture Mode
Custom
Custom
HDR Color Gamut
6.2
5.7
Wide Color Gamut
No
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
77.3%
73.5%
DCI-P3 Picture Mode
HDR On
HDR Standard
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
55.5%
52.9%
Rec. 2020 Picture Mode
HDR On
HDR Standard
HDR Color Volume
6.1
5.9
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
46.7%
44.7%
DCI-P3 Picture Mode
HDR On
HDR Standard
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
19.9%
19.1%
Rec. 2020 Picture Mode
HDR On
HDR Standard
Text Clarity
7.5
7.5
ClearType On
ClearType Off
Pixel Type
VA
VA
Pixels
Subpixel Layout
RGB
RGB
Reflections
7.5
7.5
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
5.3%
5.8%
Indirect Reflections
3.1%
3.8%
Calculated Direct Reflections
2.2%
1.9%
Gradient
9.8
9.3
Gradient Picture
Color Depth
10 Bit
10 Bit
Motion
Refresh Rate
7.5
7.5
Native Refresh Rate
165 Hz
165 Hz
Max Refresh Rate
165 Hz
165 Hz
Max Refresh Rate Over DP
165 Hz
165 Hz
Max Refresh Rate Over HDMI
144 Hz
144 Hz
Max Refresh Rate Over DP @ 10-bit
165 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 (Tested)
Compatible (Tested)
VRR Maximum
165 Hz
165 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
VRR Motion Performance
4.3
6.2
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
FreeSync Premium
FreeSync Premium (Extreme)
Variable Overdrive Advertised
No
No
Avg. CAD
449
270
Best CAD
412
229
Worst CAD
506
382
Refresh Rate Compliance
5.3
6.8
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
34%
46%
Compliance @ 120 FPS
45%
54%
Compliance @ 60 FPS
59%
69%
CAD @ Max Refresh Rate
5.7
6.2
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD faster
0 to 31
OD extreme
0 to 31
Recommended Overdrive Setting
Fastest
FreeSync (Extreme)
Avg. CAD
256
230
Best 10% CAD
83
89
Worst 10% CAD
653
558
Response Time @ Max Refresh Rate
First Response Time
8.8 ms
9.7 ms
Total Response Time
11.9 ms
11.5 ms
Recommended Overdrive Setting
Fastest
FreeSync (Extreme)
RGB Overshoot
7 RGB
3 RGB
Worst 10% RGB Overshoot
43 RGB
11 RGB
Worst 10% First Response Time
26.4 ms
25.7 ms
Worst 10% Total Response Time
26.4 ms
25.7 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
CAD @ 120Hz
5.5
6.4
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD faster
0 to 31
OD extreme
0 to 31
Recommended Overdrive Setting
Fastest
FreeSync (Extreme)
Avg. CAD
286
237
Best 10% CAD
86
110
Worst 10% CAD
633
473
Response Time @ 120Hz
Worst 10% First Response Time
31.8 ms
23.1 ms
RGB Overshoot
2 RGB
5 RGB
Total Response Time
14.2 ms
12.1 ms
First Response Time
12.5 ms
7.8 ms
Recommended Overdrive Setting
Fastest
FreeSync (Extreme)
Worst 10% Total Response Time
31.8 ms
23.1 ms
Worst 10% RGB Overshoot
15 RGB
13 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
5.4
5.3
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD faster
0 to 31
OD extreme
0 to 31
Recommended Overdrive Setting
Fastest
FreeSync (Faster)
Avg. CAD
314
310
Best 10% CAD
92
144
Worst 10% CAD
612
624
Response Time @ 60Hz
Recommended Overdrive Setting
Fastest
FreeSync (Faster)
First Response Time
14.6 ms
8.6 ms
Total Response Time
16.9 ms
18.2 ms
RGB Overshoot
1 RGB
6 RGB
Worst 10% Total Response Time
30.9 ms
28.5 ms
Worst 10% First Response Time
30.9 ms
20.8 ms
Worst 10% RGB Overshoot
9 RGB
18 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
165 Hz
165 Hz
Minimum Frequency
165 Hz
120 Hz
Longest Pulse Width Brightness
114 cd/m²
54 cd/m²
Shortest Pulse Width Brightness
114 cd/m²
54 cd/m²
Pulse Width Control
No
No
Pulse Phase Control
No
No
Pulse Amplitude Control
No
No
VRR At The Same Time
No
No
VRR Flicker
2.4
7.6
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
5.9 RGB
1.7 RGB
Middle Gray Flicker
5.1 RGB
1.9 RGB
Light Gray Flicker
4.3 RGB
1.6 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
>1000 Hz
0 Hz
Inputs
Input Lag
8.7
8.8
Native Resolution @ Max Hz
4.9 ms
4.6 ms
Native Resolution @ 120Hz
6.1 ms
5.8 ms
Native Resolution @ 60Hz
10.4 ms
9.9 ms
Backlight Strobing (BFI)
7.1 ms
7.9 ms
Resolution
7.5
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
PS5 Compatibility
4.9
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
Xbox Series X|S Compatibility
6.6
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
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
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
1 (HDMI 2.0)
2 (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"
LS27AG550ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
LS27AG550ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEARCH
Amazon.com
Samsung Odyssey G55A S27AG55
Samsung Odyssey G51C S27CG51
Comments
Samsung Odyssey G55A S27AG55 vs Samsung Odyssey G51C S27CG51: Main Discussion
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