Products
AOC Q27G3XMN
AOC Q27G40XMN
Tested using Methodology v2.1
Updated Jul 21, 2025 02:12 PM
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Amazon.com
Tested using Methodology v2.1
Updated Aug 08, 2025 07:38 PM
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BestBuy.com
Max Refresh Rate
180 Hz
Size
27"
Pixel Type
VA
Native Resolution
2560 x 1440
Max Refresh Rate
180 Hz
Size
27"
Pixel Type
VA
Native Resolution
2560 x 1440
Our Verdict
AOC Q27G3XMN
AOC Q27G40XMN
The AOC Q27G40XMN is newer than the AOC Q27G3XMN, but doesn't replace the older model. Instead, each monitor is sold at different retailers, with the Q27G40XMN being a Best Buy-exclusive model in North America, and the Q27G3XMN available on Amazon internationally. They have most of the same specs, but still have some differences. The Q27G40XMN has more dimming zones, and the local dimming feature has less blooming. The Q27G40XMN also gets brighter, so it's the better choice to use in a well-lit room. On the other hand, the Q27G3XMN comes with a more ergonomic stand, and it has higher DisplayPort bandwidth, allowing it to reach 180Hz with an NVIDIA graphics card, and a higher refresh rate in HDR.
Variants
- Q27G3XMN (27")
- Q27G40XMN (27")
Check Price
27"
Q27G3XMN
SEE PRICE
Amazon.com
27"
Q27G40XMN
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BestBuy.com
27"
Q27G3XMN
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Walmart.com
27"
Q27G40XMN
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Amazon.com
27"
Q27G3XMN
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B&H
27"
Q27G40XMN
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B&H
27"
Q27G3XMN
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BestBuy.com
27"
Q27G40XMN
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Walmart.com
Main Differences for
PC Gaming
PC Gaming
Threshold
PC Gaming
8.2
8.1
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
6.5
Build Quality Picture
Ergonomics
9.2
4.5
Ergonomics Picture
Back Picture
Height Adjustment
5.1" (12.9 cm)
0.0" (0.0 cm)
Min Height To Top Of Panel
15.4" (39.2 cm)
18.2" (46.2 cm)
Tilt Range
-20° to 5°
-20° to 5°
Rotate Portrait/Landscape
Yes, Both Ways
No
Swivel Range
-30° to 30°
No swivel
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
19.1" (48.5 cm)
11.0" (28.0 cm)
Base Depth
12.2" (31.0 cm)
7.7" (19.5 cm)
Thickness (With Display)
9.2" (23.4 cm)
5.3" (13.5 cm)
Weight (With Display)
15.8 lbs (7.2 kg)
13.9 lbs (6.3 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.2" (61.4 cm)
24.1" (61.1 cm)
Housing Height
14.3" (36.4 cm)
14.3" (36.4 cm)
Thickness (Without Stand)
2.8" (7.2 cm)
2.5" (6.3 cm)
Weight (Without Stand)
12.2 lbs (5.6 kg)
11.9 lbs (5.4 kg)
Borders Size (Bezels)
0.3" (0.8 cm)
0.3" (0.8 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
Internal
Picture Quality
Contrast
8.8
8.7
Checkerboard Picture
Native Contrast
4,508 : 1
4,361 : 1
Contrast With Local Dimming
9,613 : 1
21,609 : 1
Local Dimming
7.5
8.0
Local Dimming Video
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
SDR Brightness
7.8
8.5
Real Scene
327 cd/m²
505 cd/m²
Peak 2% Window
270 cd/m²
379 cd/m²
Peak 10% Window
332 cd/m²
511 cd/m²
Peak 25% Window
359 cd/m²
545 cd/m²
Peak 50% Window
373 cd/m²
556 cd/m²
Peak 100% Window
382 cd/m²
564 cd/m²
Sustained 2% Window
270 cd/m²
378 cd/m²
Sustained 10% Window
332 cd/m²
511 cd/m²
Sustained 25% Window
357 cd/m²
544 cd/m²
Sustained 50% Window
371 cd/m²
554 cd/m²
Sustained 100% Window
380 cd/m²
562 cd/m²
Automatic Brightness Limiting (ABL)
0.021
0.024
Minimum Brightness
34 cd/m²
38 cd/m²
HDR Brightness
8.7
9.1
EOTF
VESA DisplayHDR Certification
DisplayHDR 1000
DisplayHDR 1000
Real Scene
810 cd/m²
1,197 cd/m²
Peak 2% Window
796 cd/m²
978 cd/m²
Peak 10% Window
976 cd/m²
1,263 cd/m²
Peak 25% Window
1,034 cd/m²
861 cd/m²
Peak 50% Window
1,011 cd/m²
884 cd/m²
Peak 100% Window
966 cd/m²
899 cd/m²
Sustained 2% Window
790 cd/m²
968 cd/m²
Sustained 10% Window
970 cd/m²
1,246 cd/m²
Sustained 25% Window
1,018 cd/m²
858 cd/m²
Sustained 50% Window
991 cd/m²
879 cd/m²
Sustained 100% Window
949 cd/m²
893 cd/m²
Automatic Brightness Limiting (ABL)
0.013
0.020
Horizontal Viewing Angle
5.2
5.6
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
27°
25°
Color Washout From Right
25°
26°
Horizontal Hue Graph
Color Shift From Left
26°
30°
Color Shift From Right
26°
38°
Horizontal Lightness Graph
Brightness Loss From Left
30°
26°
Brightness Loss From Right
28°
27°
Black Level Raise From Left
15°
36°
Black Level Raise From Right
15°
40°
Gamma Shift From Left
14°
13°
Gamma Shift From Right
16°
17°
Vertical Viewing Angle
4.8
5.1
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
27°
25°
Color Washout From Above
27°
26°
Vertical Hue Graph
Color Shift From Below
21°
30°
Color Shift From Above
20°
36°
Vertical Lightness Graph
Brightness Loss From Below
29°
25°
Brightness Loss From Above
29°
27°
Black Level Raise From Below
10°
13°
Black Level Raise From Above
9°
14°
Gamma Shift From Below
12°
11°
Gamma Shift From Above
10°
13°
Gray Uniformity
7.2
8.4
50% Uniformity Picture
50% Std. Dev.
2.627%
1.425%
50% DSE
0.198%
0.141%
Black Uniformity
7.3
6.3
Native Black Uniformity Picture
Native Std. Dev.
1.426%
2.233%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
0.292%
0.343%
Color Accuracy (Pre-Calibration)
9.0
9.0
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Off (sRGB)
Standard (sRGB)
sRGB Gamut Area xy
102.3%
98.7%
White Balance dE (Avg.)
2.02
2.05
Color Temperature (Avg.)
6,487 K
6,289 K
Gamma (Avg.)
2.31
2.20
Color dE (Avg.)
1.50
1.69
Contrast Setting
N/A
N/A
RGB Settings
Default
Default
Gamma Setting
Default
Default
Brightness Setting
70
70
Measured Brightness
217 cd/m²
329 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.6
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Off
Standard
sRGB Gamut Area xy
98.0%
99.6%
White Balance dE (Avg.)
0.56
0.69
Color Temperature (Avg.)
6,504 K
6,520 K
Gamma (Avg.)
2.19
2.20
Color dE (Avg.)
0.54
0.38
Contrast Setting
50
50
RGB Settings
29-45-42
47-49-38
Gamma Setting
Gamma 1
2.2
Brightness Setting
24
15
Measured Brightness
101 cd/m²
101 cd/m²
SDR Color Gamut
9.4
9.8
sRGB Color Gamut Picture
sRGB Coverage xy
98.1%
99.6%
sRGB Picture Mode
Off
Standard
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
90.4%
95.6%
Adobe RGB Picture Mode
Off
Standard
HDR Color Gamut
8.3
8.1
Wide Color Gamut
Yes
Yes
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
91.7%
90.3%
DCI-P3 Picture Mode
Display HDR
Display HDR
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
69.6%
74.9%
Rec. 2020 Picture Mode
Display HDR
Display HDR
HDR Color Volume
8.3
8.5
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
80.1%
73.2%
DCI-P3 Picture Mode
Display HDR
Display HDR
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
38.6%
42.7%
Rec. 2020 Picture Mode
Display HDR
Display HDR
Text Clarity
7.5
7.5
ClearType On
ClearType Off
Pixel Type
VA
VA
Pixels
Subpixel Layout
RGB
RGB
Direct Reflections
6.4
7.1
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
32.3%
24.3%
Screen Finish
Matte
Matte
Ambient Black Level Raise
8.7
7.4
Black Level Raise Picture
Ambient Black Level Raise Graph
Black Luminance @ 0 lx
0.09 cd/m²
0.00 cd/m²
Black Luminance @ 1000 lx
0.59 cd/m²
1.34 cd/m²
Total Reflected Light
5.7
5.9
Bright Room Off Picture
Total Reflection Ring Light Picture
Total Reflected Light Intensity
35,932% ⋅ pixel
32,492% ⋅ pixel
Diffraction Artifacts
No
No
Gradient
9.7
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
Motion
Refresh Rate
7.7
7.7
Native Refresh Rate
165 Hz
180 Hz
Max Refresh Rate
180 Hz
180 Hz
Max Refresh Rate Over DP
180 Hz
180 Hz
Max Refresh Rate Over HDMI
144 Hz
144 Hz
Max Refresh Rate Over DP @ 10-bit
180 Hz
120 Hz
Max Refresh Rate Over HDMI @ 10-Bit
60 Hz
60 Hz
DSC Toggle
No
No
DSC Off Max Refresh Rate Over DP
N/A
N/A
DSC Off Max Refresh Rate Over HDMI
N/A
N/A
Variable Refresh Rate (VRR)
Variable Refresh Rate
Yes
Yes
FreeSync
Yes
Yes
G-SYNC
Compatible (Tested)
Compatible (Tested)
VRR Maximum
180 Hz
180 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
VRR Motion Performance
8.8
8.1
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Medium
Faster
Variable Overdrive Advertised
No
No
Avg. CAD
109
144
Best CAD
106
127
Worst CAD
117
173
Refresh Rate Compliance
8.5
8.1
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
65%
58%
Compliance @ 120 FPS
75%
69%
Compliance @ 60 FPS
86%
81%
CAD @ Max Refresh Rate
8.4
8.2
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD medium
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Medium
Faster
Avg. CAD
107
127
Best 10% CAD
29
58
Worst 10% CAD
219
217
Response Time @ Max Refresh Rate
First Response Time
4.2 ms
4.3 ms
Total Response Time
4.5 ms
6.6 ms
Recommended Overdrive Setting
Medium
Faster
RGB Overshoot
1 RGB
4 RGB
Worst 10% RGB Overshoot
8 RGB
15 RGB
Worst 10% First Response Time
10.3 ms
12.0 ms
Worst 10% Total Response Time
10.3 ms
12.3 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
CAD @ 120Hz
8.5
8.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD medium
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Medium
Faster
Avg. CAD
106
141
Best 10% CAD
31
54
Worst 10% CAD
203
247
Response Time @ 120Hz
Worst 10% First Response Time
9.4 ms
11.9 ms
RGB Overshoot
1 RGB
3 RGB
Total Response Time
4.4 ms
7.6 ms
First Response Time
3.8 ms
5.3 ms
Recommended Overdrive Setting
Medium
Faster
Worst 10% Total Response Time
9.9 ms
13.3 ms
Worst 10% RGB Overshoot
11 RGB
12 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
8.2
7.1
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD medium
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Medium
Faster
Avg. CAD
116
176
Best 10% CAD
29
58
Worst 10% CAD
276
431
Response Time @ 60Hz
Recommended Overdrive Setting
Medium
Faster
First Response Time
3.7 ms
7.2 ms
Total Response Time
5.3 ms
10.1 ms
RGB Overshoot
2 RGB
2 RGB
Worst 10% Total Response Time
17.3 ms
21.9 ms
Worst 10% First Response Time
9.2 ms
17.4 ms
Worst 10% RGB Overshoot
16 RGB
16 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)
No BFI
No BFI
Maximum Frequency
N/A
N/A
Minimum Frequency
N/A
N/A
Longest Pulse Width Brightness
N/A
N/A
Shortest Pulse Width Brightness
N/A
N/A
Pulse Width Control
No BFI
No BFI
Pulse Phase Control
No BFI
No BFI
Pulse Amplitude Control
No BFI
No BFI
VRR At The Same Time
No BFI
No BFI
VRR Flicker
2.0
8.7
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
6.7 RGB
0.5 RGB
Middle Gray Flicker
5.4 RGB
1.8 RGB
Light Gray Flicker
5.8 RGB
2.0 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
>1000 Hz
0 Hz
Inputs
Input Lag
8.8
8.9
Native Resolution @ Max Hz
4.3 ms
4.2 ms
Native Resolution @ 120Hz
5.1 ms
5.5 ms
Native Resolution @ 60Hz
9.3 ms
9.7 ms
Backlight Strobing (BFI)
N/A
N/A
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
7.1
7.1
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
Inputs 1
Inputs 2
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
2 (HDMI 2.0)
1 (HDMI 2.0)
HDMI 2.1 Bandwidth
No HDMI 2.1
No HDMI 2.1
Daisy Chaining
No
No
3.5mm Audio Out
Yes
Yes
Ethernet
No
No
HDR10
Yes
Yes
Dolby Vision
No
No
USB
USB-A Ports
0
0
USB-A Rated Speed
No USB-A Ports
No USB-A Ports
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
Smart OS
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
Q27G3XMN
SEE PRICE
Amazon.com
27"
Q27G40XMN
SEE PRICE
BestBuy.com
27"
Q27G3XMN
SEE PRICE
Walmart.com
27"
Q27G40XMN
SEARCH
Amazon.com
27"
Q27G3XMN
SEARCH
B&H
27"
Q27G40XMN
SEARCH
B&H
27"
Q27G3XMN
SEARCH
BestBuy.com
27"
Q27G40XMN
SEARCH
Walmart.com
AOC Q27G3XMN
AOC Q27G40XMN
Comments
AOC Q27G3XMN vs AOC Q27G40XMN: Main Discussion
What do you think of these products? Let us know below.
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Between these 2 which would y'all say is better for strictly xbox series x, in terms of picture quality.