Products
AOC CQ27G2
Samsung Odyssey G55T C27G55T
Tested using Methodology v1.2
Updated Jun 13, 2025 08:56 PM
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Tested using Methodology v1.2
Updated Jun 13, 2025 08:56 PM
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Amazon.com
Max Refresh Rate
144 Hz
Size
27"
Pixel Type
VA
Variable Refresh Rate
Yes
HDR10
No
Native Resolution
2560 x 1440
Max Refresh Rate
144 Hz
Size
27"
Pixel Type
VA
Variable Refresh Rate
Yes
HDR10
Yes
Native Resolution
2560 x 1440
Our Verdict
AOC CQ27G2
Samsung Odyssey G55T C27G55T
The AOC CQ27G2 is much better than the Samsung Odyssey G55T C27G55T. The AOC has significantly better ergonomics, faster response time, and lower input lag, especially when playing at 60Hz. However, the Samsung provides better visibility in well-lit rooms due to its higher peak brightness and better reflection handling.
Variants
- CQ27G2 (27")
- LC27G55TQWNXZA (27")
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27"
CQ27G2
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27"
LC27G55TQWNXZA
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27"
CQ27G2
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27"
LC27G55TQWNXZA
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27"
CQ27G2
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27"
LC27G55TQWNXZA
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CQ27G2
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27"
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
6.8
6.7
Ergonomics
7.6
1.7
Image Flicker
10
2.0
Full Comparison
Design
Style
Design Picture
Curved
Yes
Yes
Curve Radius
1500R
1000R
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
7.0
Build Quality Picture
Ergonomics
7.6
1.7
Ergonomics Picture
Back Picture
Height Adjustment
5.1" (13.0 cm)
0.0" (0.0 cm)
Tilt Range
-20° to 5°
-17.5° to 2.5°
Rotate Portrait/Landscape
No
No
Swivel Range
-30° to 30°
No swivel
Wall Mount
VESA 100x100
VESA 75x75
Stand
Stand Picture
Thickness Picture
Base Width
17.2" (43.7 cm)
21.7" (55.0 cm)
Base Depth
9.1" (23.0 cm)
10.8" (27.5 cm)
Thickness (With Display)
7.7" (19.5 cm)
9.4" (24.0 cm)
Weight (With Display)
11.9 lbs (5.4 kg)
9.9 lbs (4.5 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.1" (61.1 cm)
24.2" (61.4 cm)
Housing Height
14.4" (36.6 cm)
15.1" (38.3 cm)
Thickness (Without Stand)
2.9" (7.3 cm)
4.7" (12.0 cm)
Weight (Without Stand)
9.0 lbs (4.1 kg)
9.7 lbs (4.4 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.5" (1.2 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
External Brick
Picture Quality
Contrast
8.3
7.9
Checkerboard Picture
Native Contrast
3,858 : 1
2,997 : 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
6.3
7.2
Real Scene
225 cd/m²
285 cd/m²
Peak 2% Window
196 cd/m²
150 cd/m²
Peak 10% Window
196 cd/m²
281 cd/m²
Peak 25% Window
197 cd/m²
281 cd/m²
Peak 50% Window
197 cd/m²
281 cd/m²
Peak 100% Window
197 cd/m²
281 cd/m²
Sustained 2% Window
196 cd/m²
150 cd/m²
Sustained 10% Window
196 cd/m²
281 cd/m²
Sustained 25% Window
196 cd/m²
281 cd/m²
Sustained 50% Window
197 cd/m²
281 cd/m²
Sustained 100% Window
197 cd/m²
281 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.044
Minimum Brightness
38 cd/m²
37 cd/m²
HDR Brightness
0.0
5.9
EOTF
VESA DisplayHDR Certification
No Certification
No Certification
Real Scene
N/A
298 cd/m²
Peak 2% Window
N/A
159 cd/m²
Peak 10% Window
N/A
297 cd/m²
Peak 25% Window
N/A
297 cd/m²
Peak 50% Window
N/A
297 cd/m²
Peak 100% Window
N/A
297 cd/m²
Sustained 2% Window
N/A
158 cd/m²
Sustained 10% Window
N/A
296 cd/m²
Sustained 25% Window
N/A
297 cd/m²
Sustained 50% Window
N/A
297 cd/m²
Sustained 100% Window
N/A
297 cd/m²
Automatic Brightness Limiting (ABL)
N/A
0.043
Horizontal Viewing Angle
5.5
5.4
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
25°
29°
Color Washout From Right
25°
29°
Horizontal Hue Graph
Color Shift From Left
41°
39°
Color Shift From Right
42°
42°
Horizontal Lightness Graph
Brightness Loss From Left
28°
30°
Brightness Loss From Right
28°
30°
Black Level Raise From Left
16°
12°
Black Level Raise From Right
16°
14°
Gamma Shift From Left
18°
12°
Gamma Shift From Right
17°
15°
Vertical Viewing Angle
5.1
4.9
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
26°
25°
Color Washout From Above
27°
26°
Vertical Hue Graph
Color Shift From Below
41°
25°
Color Shift From Above
40°
29°
Vertical Lightness Graph
Brightness Loss From Below
29°
28°
Brightness Loss From Above
30°
29°
Black Level Raise From Below
11°
6°
Black Level Raise From Above
11°
9°
Gamma Shift From Below
11°
12°
Gamma Shift From Above
10°
15°
Gray Uniformity
8.1
8.7
50% Uniformity Picture
50% Std. Dev.
2.124%
1.852%
50% DSE
0.152%
0.119%
Black Uniformity
3.0
3.5
Native Black Uniformity Picture
Native Std. Dev.
3.987%
3.691%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
7.7
9.0
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Standard (sRGB)
Custom
sRGB Gamut Area xy
105.6%
101.1%
White Balance dE (Avg.)
4.06
1.74
Color Temperature (Avg.)
7,316 K
6,747 K
Gamma (Avg.)
2.31
2.08
Color dE (Avg.)
2.97
2.16
Contrast Setting
50
75
RGB Settings
sRGB
50-50-50
Gamma Setting
Gamma 1
Mode 1
Brightness Setting
90
55
Measured Brightness
188 cd/m²
191 cd/m²
Brightness Locked
Yes
No
Color Accuracy (Post-Calibration)
9.5
9.3
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Standard (User)
Custom
sRGB Gamut Area xy
97.3%
95.0%
White Balance dE (Avg.)
0.68
0.51
Color Temperature (Avg.)
6,512 K
6,472 K
Gamma (Avg.)
2.19
2.19
Color dE (Avg.)
0.62
0.84
Contrast Setting
50
75
RGB Settings
51-50-45
52-49-48
Gamma Setting
Gamma 1
Mode 1
Brightness Setting
38
26
Measured Brightness
101 cd/m²
100 cd/m²
SDR Color Gamut
9.1
8.5
sRGB Color Gamut Picture
sRGB Coverage xy
97.5%
95.5%
sRGB Picture Mode
Standard
Custom
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
81.4%
73.2%
Adobe RGB Picture Mode
Standard
Custom
SDR Color Volume
9.7
7.7
sRGB Color Volume ITP Picture
sRGB In ICtCp
99.0%
79.7%
sRGB Picture Mode
Standard
Custom
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
89.4%
67.4%
Adobe RGB Picture Mode
Standard
Custom
HDR Color Gamut
0.0
5.9
Wide Color Gamut
N/A
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
N/A
74.7%
DCI-P3 Picture Mode
No HDR
Custom
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
N/A
51.9%
Rec. 2020 Picture Mode
No HDR
Custom
HDR Color Volume
0.0
5.4
DCI-P3 Color Volume ITP Picture
DCI-P3 In ICtCp
N/A
55.3%
DCI-P3 Picture Mode
No HDR
Custom
Rec. 2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
N/A
42.2%
Rec. 2020 Picture Mode
No HDR
Custom
Reflections
7.4
7.8
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
5.8%
5.2%
Indirect Reflections
3.8%
3.6%
Calculated Direct Reflections
2.0%
1.5%
Text Clarity
7.5
7.0
ClearType On
ClearType Off
Pixel Type
VA
VA
Pixels
Subpixel Layout
RGB
RGB
Gradient
8.2
9.8
Gradient Picture
Color Depth
8 Bit
10 Bit
Motion
Refresh Rate
8.3
8.3
Native Refresh Rate
144 Hz
144 Hz
Max Refresh Rate
144 Hz
144 Hz
Max Refresh Rate Over DP
144 Hz
144 Hz
Max Refresh Rate Over HDMI
144 Hz
144 Hz
Max Refresh Rate Over DP @ 10-bit
N/A
120 Hz
Max Refresh Rate Over HDMI @ 10-Bit
N/A
60 Hz
Variable Refresh Rate (VRR)
FreeSync
Yes
Yes
G-SYNC
Compatible (Tested)
Compatible (Tested)
VRR Maximum
144 Hz
144 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
Variable Refresh Rate
Yes
Yes
Response Time @ Max Refresh Rate
6.4
4.7
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Strong
FreeSync On
Rise / Fall Time
6.6 ms
11.6 ms
Total Response Time
15.1 ms
21.9 ms
Overshoot Error
1.0%
0.0%
Worst 3 Rise / Fall Time
20.4 ms
23.2 ms
Worst 3 Total Response Time
36.9 ms
38.6 ms
Worst 3 Overshoot Error
7.8%
0.0%
Response Time @ 120Hz
6.5
4.5
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Strong
FreeSync On
Rise / Fall Time
6.3 ms
12.3 ms
Total Response Time
15.3 ms
22.9 ms
Overshoot Error
1.6%
0.0%
Worst 3 Rise / Fall Time
19.7 ms
23.3 ms
Worst 3 Total Response Time
33.7 ms
38.7 ms
Worst 3 Overshoot Error
9.8%
0.0%
Response Time @ 60Hz
6.1
2.6
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Strong
FreeSync On
Rise / Fall Time
5.2 ms
18.2 ms
Total Response Time
21.4 ms
33.3 ms
Overshoot Error
5.7%
0.0%
Worst 3 Rise / Fall Time
9.5 ms
28.3 ms
Worst 3 Total Response Time
44.4 ms
49.7 ms
Worst 3 Overshoot Error
23.1%
0.0%
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
Yes
Yes
Maximum Frequency
144 Hz
144 Hz
Minimum Frequency
100 Hz
144 Hz
Longest Pulse Width Brightness
186 cd/m²
147 cd/m²
Shortest Pulse Width Brightness
68 cd/m²
147 cd/m²
Pulse Width Control
Yes
No
Pulse Phase Control
No
No
Pulse Amplitude Control
No
No
VRR At The Same Time
No
No
Image Flicker
10
2.0
Backlight Picture
Flicker-Free
Yes
No
PWM Dimming Frequency
0 Hz
144 Hz
Inputs
Input Lag
9.0
8.8
Native Resolution @ Max Hz
3.7 ms
4.5 ms
Native Resolution @ 120Hz
5.0 ms
5.2 ms
Native Resolution @ 60Hz
8.6 ms
9.2 ms
Backlight Strobing (BFI)
5.1 ms
4.4 ms
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
310 in²
310 in²
PS5 Compatibility
3.0
7.0
PS5 Compatibility Photo
4k @ 120Hz
No
No
4k @ 60Hz
No
Yes
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
No
Yes
VRR
No
No
Xbox Series X|S Compatibility
5.8
9.2
XSX Compatibility Photo
4k @ 120Hz
No
No
4k @ 60Hz
No
Yes
1440p @ 120Hz
Yes
Yes
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 60Hz
Yes
Yes
HDR
No
Yes
VRR
Yes
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
1 (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
1
HDR10
No
Yes
3.5mm Audio In
No
No
3.5mm Microphone In
No
No
USB
USB-A Ports
0
1 (Service Port Only)
USB-A Rated Speed
No USB-A Ports
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
Yes
RGB Illumination
No
No
Multiple Input Display
No
No
KVM Switch
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
CQ27G2
SEE PRICE
Walmart.com
27"
LC27G55TQWNXZA
SEE PRICE
Amazon.com
27"
CQ27G2
SEE PRICE
Amazon.com
27"
LC27G55TQWNXZA
SEE PRICE
BestBuy.com
27"
CQ27G2
SEARCH
B&H
27"
LC27G55TQWNXZA
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Walmart.com
27"
CQ27G2
SEARCH
BestBuy.com
27"
LC27G55TQWNXZA
SEARCH
B&H
27"
LC27G55TQWNXZA
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Samsung.com
AOC CQ27G2
Samsung Odyssey G55T C27G55T
Comments
AOC CQ27G2 vs Samsung Odyssey G55T C27G55T: Main Discussion
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