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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
AOC CQ27G2 vs Samsung Odyssey G51C S27CG51
Side-by-Side Comparison
Products
AOC CQ27G2
Samsung Odyssey G51C S27CG51
Tested using Methodology v1.2
Updated Mar 06, 2024 09:05 PM
SEE PRICE
Walmart.comTested using Methodology v2.0.1
Updated Feb 19, 2025 04:48 PM
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Amazon.com
Max Refresh Rate144 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Variable Refresh RateYes
HDR10No
Max Refresh Rate165 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Variable Refresh RateYes
HDR10Yes
Variants
- CQ27G2 (27")
- LS27CG512ENXZA (27")
Our Verdict
AOC CQ27G2
Samsung Odyssey G51C S27CG51
The AOC CQ27G2 and the Samsung Odyssey G5/G51C S27CG51 are both entry-level 1440p gaming monitors with a few similarities. The Samsung has a slightly higher refresh rate, but motion handling is similar between each. The Samsung has better reflection handling and gets a bit brighter, making it a slightly better choice for use in well-lit rooms. The Samsung also supports HDR, which the AOC doesn't, and it has swivel adjustment, making it easier to place in an ideal position.
Check Price
27"
CQ27G2
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Walmart.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
CQ27G2
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Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Samsung.com27"
CQ27G2
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B&H27"
LS27CG512ENXZA
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BestBuy.com27"
CQ27G2
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BestBuy.com27"
LS27CG512ENXZA
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Walmart.com27"
LS27CG512ENXZA
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B&HNotice:
Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable.
Learn how our test benches and scoring system work, and read more about the latest changes to our
monitors test methodology.
Read more
Main Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
6.8
Full Comparison
Design
Style
Design Picture
Curved
Yes
No
Curve Radius
1500R
Not Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
7.0
Build Quality Picture
Ergonomics
7.6
9.0
Ergonomics Picture
Back Picture
Height Adjustment
5.1" (13.0 cm)
4.7" (11.9 cm)
Min Height To Top Of Panel
15.3" (38.8 cm)
Tilt Range
-20° to 5°
-22.5° to 5°
Rotate Portrait/Landscape
No
Yes, Clockwise
Swivel Range
-30° to 30°
-30° to 30°
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
17.2" (43.7 cm)
18.0" (45.8 cm)
Base Depth
9.1" (23.0 cm)
8.6" (21.9 cm)
Thickness (With Display)
7.7" (19.5 cm)
6.5" (16.4 cm)
Weight (With Display)
11.9 lbs (5.4 kg)
10.4 lbs (4.7 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.1" (61.1 cm)
24.3" (61.7 cm)
Housing Height
14.4" (36.6 cm)
15.0" (38.0 cm)
Thickness (Without Stand)
2.9" (7.3 cm)
2.9" (7.4 cm)
Weight (Without Stand)
9.0 lbs (4.1 kg)
7.2 lbs (3.3 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.2" (0.6 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
External Brick
Picture Quality
Contrast
8.3
7.7
Checkerboard Picture
Native Contrast
3,858 : 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
6.3
6.8
Real Scene
225 cd/m²
242 cd/m²
Peak 2% Window
196 cd/m²
249 cd/m²
Peak 10% Window
196 cd/m²
250 cd/m²
Peak 25% Window
197 cd/m²
250 cd/m²
Peak 50% Window
197 cd/m²
250 cd/m²
Peak 100% Window
197 cd/m²
250 cd/m²
Sustained 2% Window
196 cd/m²
249 cd/m²
Sustained 10% Window
196 cd/m²
250 cd/m²
Sustained 25% Window
196 cd/m²
250 cd/m²
Sustained 50% Window
197 cd/m²
250 cd/m²
Sustained 100% Window
197 cd/m²
249 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.000
Minimum Brightness
38 cd/m²
42 cd/m²
HDR Brightness
0.0
5.9
EOTF
VESA DisplayHDR Certification
No Certification
No Certification
Real Scene
N/A
279 cd/m²
Peak 2% Window
N/A
295 cd/m²
Peak 10% Window
N/A
296 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
295 cd/m²
Sustained 10% Window
N/A
296 cd/m²
Sustained 25% Window
N/A
296 cd/m²
Sustained 50% Window
N/A
297 cd/m²
Sustained 100% Window
N/A
296 cd/m²
Automatic Brightness Limiting (ABL)
N/A
0.000
Horizontal Viewing Angle
5.5
6.3
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
25°
34°
Color Washout From Right
25°
34°
Horizontal Hue Graph
Color Shift From Left
41°
70°
Color Shift From Right
42°
70°
Horizontal Lightness Graph
Brightness Loss From Left
28°
43°
Brightness Loss From Right
28°
43°
Black Level Raise From Left
16°
20°
Black Level Raise From Right
16°
22°
Gamma Shift From Left
18°
11°
Gamma Shift From Right
17°
11°
Vertical Viewing Angle
5.1
5.7
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
26°
26°
Color Washout From Above
27°
28°
Vertical Hue Graph
Color Shift From Below
41°
57°
Color Shift From Above
40°
57°
Vertical Lightness Graph
Brightness Loss From Below
29°
30°
Brightness Loss From Above
30°
32°
Black Level Raise From Below
11°
19°
Black Level Raise From Above
11°
21°
Gamma Shift From Below
11°
11°
Gamma Shift From Above
10°
14°
Gray Uniformity
8.1
8.6
50% Uniformity Picture
50% Std. Dev.
2.124%
1.959%
50% DSE
0.152%
0.122%
Black Uniformity
3.0
8.5
Native Black Uniformity Picture
Native Std. Dev.
3.987%
0.748%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
7.7
6.9
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Standard (sRGB)
Custom
sRGB Gamut Area xy
105.6%
100.5%
White Balance dE (Avg.)
4.06
7.86
Color Temperature (Avg.)
7,316 K
8,063 K
Gamma (Avg.)
2.31
2.16
Color dE (Avg.)
2.97
4.95
Contrast Setting
50
70
RGB Settings
sRGB
50-50-50
Gamma Setting
Gamma 1
Mode 1
Brightness Setting
90
100
Measured Brightness
188 cd/m²
294 cd/m²
Brightness Locked
Yes
No
Color Accuracy (Post-Calibration)
9.5
9.0
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Standard (User)
Custom
sRGB Gamut Area xy
97.3%
99.7%
White Balance dE (Avg.)
0.68
0.58
Color Temperature (Avg.)
6,512 K
6,539 K
Gamma (Avg.)
2.19
2.19
Color dE (Avg.)
0.62
3.61
Contrast Setting
50
70
RGB Settings
51-50-45
42-41-41
Gamma Setting
Gamma 1
Mode 3
Brightness Setting
38
24
Measured Brightness
101 cd/m²
100 cd/m²
SDR Color Gamut
9.1
8.6
sRGB Color Gamut Picture
sRGB Coverage xy
97.5%
95.2%
sRGB Picture Mode
Standard
Custom
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
81.4%
75.4%
Adobe RGB Picture Mode
Standard
Custom
HDR Color Gamut
0.0
5.7
Wide Color Gamut
N/A
No
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
N/A
73.5%
DCI-P3 Picture Mode
No HDR
HDR Standard
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
N/A
52.9%
Rec. 2020 Picture Mode
No HDR
HDR Standard
HDR Color Volume
0.0
5.9
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
N/A
44.7%
DCI-P3 Picture Mode
No HDR
HDR Standard
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
N/A
19.1%
Rec. 2020 Picture Mode
No HDR
HDR Standard
Text Clarity
7.5
7.5
ClearType On
ClearType Off
Pixel Type
VA
VA
Pixels
Subpixel Layout
RGB
RGB
Reflections
7.4
7.5
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
5.8%
5.8%
Indirect Reflections
3.8%
3.8%
Calculated Direct Reflections
2.0%
1.9%
Gradient
8.2
9.3
Gradient Picture
Color Depth
8 Bit
10 Bit
SDR Color Volume
9.7
sRGB Color Volume ITP Picture
sRGB In ICtCp
99.0%
sRGB Picture Mode
Standard
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
89.4%
Adobe RGB Picture Mode
Standard
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
N/A
120 Hz
Max Refresh Rate Over HDMI @ 10-Bit
N/A
60 Hz
Variable Refresh Rate (VRR)
Variable Refresh Rate
Yes
Yes
FreeSync
Yes
Yes
G-SYNC
Compatible (Tested)
Compatible (Tested)
VRR Maximum
144 Hz
165 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
VRR Motion Performance
6.2
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
FreeSync Premium (Extreme)
Variable Overdrive Advertised
No
Avg. CAD
270
Best CAD
229
Worst CAD
382
Refresh Rate Compliance
6.8
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
46%
Compliance @ 120 FPS
54%
Compliance @ 60 FPS
69%
Response Time @ 60Hz
6.1
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Strong
FreeSync (Faster)
Rise / Fall Time
5.2 ms
8.6 ms
Total Response Time
21.4 ms
18.2 ms
Overshoot Error
5.7%
6 RGB
Worst 3 Rise / Fall Time
9.5 ms
20.8 ms
Worst 3 Total Response Time
44.4 ms
28.5 ms
Worst 3 Overshoot Error
23.1%
18 RGB
CAD @ Max Refresh Rate
6.2
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD extreme
0 to 31
Recommended Overdrive Setting
FreeSync (Extreme)
Avg. CAD
230
Best 10% CAD
89
Worst 10% CAD
558
Response Time @ Max Refresh Rate
First Response Time
6.6 ms
9.7 ms
Total Response Time
15.1 ms
11.5 ms
Recommended Overdrive Setting
Strong
FreeSync (Extreme)
Motion Blur Picture
RGB Overshoot
1.0%
3 RGB
Worst 10% RGB Overshoot
7.8%
11 RGB
Worst 10% First Response Time
20.4 ms
25.7 ms
Worst 10% Total Response Time
36.9 ms
25.7 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
Response Time Table
CAD @ 120Hz
6.4
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD extreme
0 to 31
Recommended Overdrive Setting
FreeSync (Extreme)
Avg. CAD
237
Best 10% CAD
110
Worst 10% CAD
473
Response Time @ 120Hz
Worst 10% First Response Time
19.7 ms
23.1 ms
RGB Overshoot
1.6%
5 RGB
Total Response Time
15.3 ms
12.1 ms
First Response Time
6.3 ms
7.8 ms
Recommended Overdrive Setting
Strong
FreeSync (Extreme)
Worst 10% Total Response Time
33.7 ms
23.1 ms
Worst 10% RGB Overshoot
9.8%
13 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
Motion Blur Picture
Response Time Table
CAD @ 60Hz
5.3
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD extreme
0 to 31
Recommended Overdrive Setting
FreeSync (Faster)
Avg. CAD
310
Best 10% CAD
144
Worst 10% CAD
624
Response Time @ 60Hz
Recommended Overdrive Setting
Strong
FreeSync (Faster)
First Response Time
5.2 ms
8.6 ms
Total Response Time
21.4 ms
18.2 ms
RGB Overshoot
5.7%
6 RGB
Worst 10% Total Response Time
44.4 ms
28.5 ms
Worst 10% First Response Time
9.5 ms
20.8 ms
Worst 10% RGB Overshoot
23.1%
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
144 Hz
165 Hz
Minimum Frequency
100 Hz
120 Hz
Longest Pulse Width Brightness
186 cd/m²
54 cd/m²
Shortest Pulse Width Brightness
68 cd/m²
54 cd/m²
Pulse Width Control
Yes
No
Pulse Phase Control
No
No
Pulse Amplitude Control
No
No
VRR At The Same Time
No
No
VRR Flicker
7.6
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
1.7 RGB
Middle Gray Flicker
1.9 RGB
Light Gray Flicker
1.6 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Inputs
Input Lag
9.0
8.8
Native Resolution @ Max Hz
3.7 ms
4.6 ms
Native Resolution @ 120Hz
5.0 ms
5.8 ms
Native Resolution @ 60Hz
8.6 ms
9.9 ms
Backlight Strobing (BFI)
5.1 ms
7.9 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
310 in²
PS5 Compatibility
3.0
4.9
PS5 Compatibility Photo
PS5 Compatibility Table
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
VRR
No
Xbox Series X|S Compatibility
5.8
6.6
XSX Compatibility Photo
XSX Compatibility Table
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
VRR
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
DisplayPort Transmission Bandwidth
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
2 (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
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
No
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.com27"
LS27CG512ENXZA
SEE PRICE
Amazon.com27"
CQ27G2
SEE PRICE
Amazon.com27"
LS27CG512ENXZA
SEE PRICE
Samsung.com27"
CQ27G2
SEARCH
B&H27"
LS27CG512ENXZA
SEE PRICE
BestBuy.com27"
CQ27G2
SEARCH
BestBuy.com27"
LS27CG512ENXZA
SEE PRICE
Walmart.com27"
LS27CG512ENXZA
SEARCH
B&H
AOC CQ27G2
Samsung Odyssey G51C S27CG51
Comments
AOC CQ27G2 vs Samsung Odyssey G51C S27CG51: Main Discussion
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