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Products
Xiaomi G Pro 27i
AOC Q27G40XMN
Tested using Methodology v2.1
Updated Jun 11, 2025 02:06 PM
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Amazon.comTested using Methodology v2.1
Updated Aug 08, 2025 07:38 PM
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BestBuy.com
Max Refresh Rate180 Hz
Size27"
Pixel TypeIPS
Native Resolution2560 x 1440
Max Refresh Rate180 Hz
Size27"
Pixel TypeVA
Native Resolution2560 x 1440
Our Verdict
Xiaomi G Pro 27i
AOC Q27G40XMN
The AOC Q27G40XMN and the Xiaomi G Pro 27i are both 1440p gaming monitors with Mini LED backlighting. They each have 1,152 dimming zones and get very bright, but the local dimming feature on the AOC results in less blooming. Plus, the AOC has a VA panel with a higher native contrast ratio if you aren't going to use local dimming. The Xiaomi has advantages in other ways, though, as it has wider viewing angles and better ergonomics, making it easier to share the screen with others. The Xiaomi also has less smearing and inverse ghosting with fast-moving objects.
Variants
- G Pro 27i (27")
- Q27G40XMN (27")
Check Price
27"
G Pro 27i
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Amazon.com27"
Q27G40XMN
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Walmart.comMain Differences forPC Gaming
PC Gaming
Threshold
PC Gaming
7.9
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
8.0
6.5
Build Quality Picture
Ergonomics
8.7
4.5
Ergonomics Picture
Back Picture
Height Adjustment
4.5" (11.5 cm)
0.0" (0.0 cm)
Min Height To Top Of Panel
15.8" (40.2 cm)
18.2" (46.2 cm)
Tilt Range
-15° to 7.5°
-20° to 5°
Rotate Portrait/Landscape
Yes, Both Ways
No
Swivel Range
-35° to 35°
No swivel
Wall Mount
VESA 75x75
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
18.5" (47.0 cm)
11.0" (28.0 cm)
Base Depth
9.5" (24.2 cm)
7.7" (19.5 cm)
Thickness (With Display)
6.8" (17.3 cm)
5.3" (13.5 cm)
Weight (With Display)
15.0 lbs (6.8 kg)
13.9 lbs (6.3 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.2" (61.5 cm)
24.1" (61.1 cm)
Housing Height
14.4" (36.6 cm)
14.3" (36.4 cm)
Thickness (Without Stand)
3.1" (8.0 cm)
2.5" (6.3 cm)
Weight (Without Stand)
10.8 lbs (4.9 kg)
11.9 lbs (5.4 kg)
Borders Size (Bezels)
0.4" (1.0 cm)
0.3" (0.8 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
Internal
Picture Quality
Contrast
7.4
8.7
Checkerboard Picture
Native Contrast
1,488 : 1
4,361 : 1
Contrast With Local Dimming
8,208 : 1
21,609 : 1
Local Dimming
7.5
8.0
Local Dimming Video
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
SDR Brightness
8.9
8.5
Real Scene
773 cd/m²
505 cd/m²
Peak 2% Window
590 cd/m²
379 cd/m²
Peak 10% Window
781 cd/m²
511 cd/m²
Peak 25% Window
836 cd/m²
545 cd/m²
Peak 50% Window
869 cd/m²
556 cd/m²
Peak 100% Window
891 cd/m²
564 cd/m²
Sustained 2% Window
589 cd/m²
378 cd/m²
Sustained 10% Window
772 cd/m²
511 cd/m²
Sustained 25% Window
830 cd/m²
544 cd/m²
Sustained 50% Window
865 cd/m²
554 cd/m²
Sustained 100% Window
889 cd/m²
562 cd/m²
Automatic Brightness Limiting (ABL)
0.022
0.024
Minimum Brightness
45 cd/m²
38 cd/m²
HDR Brightness
9.0
9.1
EOTF
VESA DisplayHDR Certification
DisplayHDR 1000
DisplayHDR 1000
Real Scene
1,006 cd/m²
1,197 cd/m²
Peak 2% Window
879 cd/m²
978 cd/m²
Peak 10% Window
1,214 cd/m²
1,263 cd/m²
Peak 25% Window
1,302 cd/m²
861 cd/m²
Peak 50% Window
1,354 cd/m²
884 cd/m²
Peak 100% Window
1,250 cd/m²
899 cd/m²
Sustained 2% Window
876 cd/m²
968 cd/m²
Sustained 10% Window
1,193 cd/m²
1,246 cd/m²
Sustained 25% Window
1,284 cd/m²
858 cd/m²
Sustained 50% Window
1,347 cd/m²
879 cd/m²
Sustained 100% Window
1,044 cd/m²
893 cd/m²
Automatic Brightness Limiting (ABL)
0.022
0.020
Horizontal Viewing Angle
6.9
5.6
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
26°
25°
Color Washout From Right
28°
26°
Horizontal Hue Graph
Color Shift From Left
48°
30°
Color Shift From Right
44°
38°
Horizontal Lightness Graph
Brightness Loss From Left
30°
26°
Brightness Loss From Right
31°
27°
Black Level Raise From Left
70°
36°
Black Level Raise From Right
70°
40°
Gamma Shift From Left
32°
13°
Gamma Shift From Right
35°
17°
Vertical Viewing Angle
7.2
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
53°
30°
Color Shift From Above
45°
36°
Vertical Lightness Graph
Brightness Loss From Below
31°
25°
Brightness Loss From Above
29°
27°
Black Level Raise From Below
70°
13°
Black Level Raise From Above
70°
14°
Gamma Shift From Below
45°
11°
Gamma Shift From Above
45°
13°
Gray Uniformity
7.7
8.4
50% Uniformity Picture
50% Std. Dev.
3.434%
1.425%
50% DSE
0.153%
0.141%
Black Uniformity
6.0
6.3
Native Black Uniformity Picture
Native Std. Dev.
2.472%
2.233%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
0.500%
0.343%
Color Accuracy (Pre-Calibration)
8.2
9.0
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Movie (sRGB)
Standard (sRGB)
sRGB Gamut Area xy
99.8%
98.7%
White Balance dE (Avg.)
4.54
2.05
Color Temperature (Avg.)
6,489 K
6,289 K
Gamma (Avg.)
2.22
2.20
Color dE (Avg.)
2.61
1.69
Contrast Setting
75
N/A
RGB Settings
Default
Default
Gamma Setting
Default
Default
Brightness Setting
50
70
Measured Brightness
461 cd/m²
329 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.7
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Movie (Native)
Standard
sRGB Gamut Area xy
99.2%
99.6%
White Balance dE (Avg.)
0.73
0.69
Color Temperature (Avg.)
6,479 K
6,520 K
Gamma (Avg.)
2.18
2.20
Color dE (Avg.)
0.45
0.38
Contrast Setting
75
50
RGB Settings
50-49-49
47-49-38
Gamma Setting
2.4
2.2
Brightness Setting
4
15
Measured Brightness
97 cd/m²
101 cd/m²
SDR Color Gamut
9.8
9.8
sRGB Color Gamut Picture
sRGB Coverage xy
99.2%
99.6%
sRGB Picture Mode
Movie (Native)
Standard
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
97.5%
95.6%
Adobe RGB Picture Mode
Movie (Native)
Standard
HDR Color Gamut
9.5
8.1
Wide Color Gamut
Yes
Yes
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
98.9%
90.3%
DCI-P3 Picture Mode
HDR
Display HDR
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
81.9%
74.9%
Rec. 2020 Picture Mode
HDR
Display HDR
HDR Color Volume
8.9
8.5
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
91.3%
73.2%
DCI-P3 Picture Mode
HDR
Display HDR
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
47.0%
42.7%
Rec. 2020 Picture Mode
HDR
Display HDR
Text Clarity
7.5
7.5
ClearType On
ClearType Off
Pixel Type
IPS
VA
Pixels
Subpixel Layout
RGB
RGB
Direct Reflections
7.4
7.1
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
20.6%
24.3%
Screen Finish
Matte
Matte
Ambient Black Level Raise
6.9
7.4
Black Level Raise Picture
Ambient Black Level Raise Graph
Black Luminance @ 0 lx
0.00 cd/m²
0.00 cd/m²
Black Luminance @ 1000 lx
1.63
1.34 cd/m²
Total Reflected Light
6.5
5.9
Bright Room Off Picture
Total Reflection Ring Light Picture
Total Reflected Light Intensity
26,457% ⋅ pixel
32,492% ⋅ pixel
Diffraction Artifacts
No
No
Gradient
9.6
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
Motion
Refresh Rate
7.7
7.7
Native Refresh Rate
180 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
Compatible (Tested)
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
7.8
8.1
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Fast
Faster
Variable Overdrive Advertised
No
No
Avg. CAD
168
144
Best CAD
156
127
Worst CAD
198
173
Refresh Rate Compliance
7.7
8.1
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
47%
58%
Compliance @ 120 FPS
63%
69%
Compliance @ 60 FPS
77%
81%
CAD @ Max Refresh Rate
8.0
8.2
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD fast
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Faster
Faster
Avg. CAD
148
127
Best 10% CAD
79
58
Worst 10% CAD
226
217
Response Time @ Max Refresh Rate
First Response Time
4.7 ms
4.3 ms
Total Response Time
5.5 ms
6.6 ms
Recommended Overdrive Setting
Faster
Faster
RGB Overshoot
2 RGB
4 RGB
Worst 10% RGB Overshoot
12 RGB
15 RGB
Worst 10% First Response Time
8.0 ms
12.0 ms
Worst 10% Total Response Time
9.3 ms
12.3 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
CAD @ 120Hz
7.8
8.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD fast
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Faster
Faster
Avg. CAD
160
141
Best 10% CAD
85
54
Worst 10% CAD
247
247
Response Time @ 120Hz
Worst 10% First Response Time
6.9 ms
11.9 ms
RGB Overshoot
3 RGB
3 RGB
Total Response Time
6.9 ms
7.6 ms
First Response Time
5.0 ms
5.3 ms
Recommended Overdrive Setting
Faster
Faster
Worst 10% Total Response Time
12.6 ms
13.3 ms
Worst 10% RGB Overshoot
14 RGB
12 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
7.6
7.1
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD fast
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Faster
Faster
Avg. CAD
175
176
Best 10% CAD
90
58
Worst 10% CAD
258
431
Response Time @ 60Hz
Recommended Overdrive Setting
Faster
Faster
First Response Time
6.4 ms
7.2 ms
Total Response Time
7.9 ms
10.1 ms
RGB Overshoot
1 RGB
2 RGB
Worst 10% Total Response Time
19.4 ms
21.9 ms
Worst 10% First Response Time
8.9 ms
17.4 ms
Worst 10% RGB Overshoot
6 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
9.2
8.7
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
0.7 RGB
0.5 RGB
Middle Gray Flicker
0.3 RGB
1.8 RGB
Light Gray Flicker
0.6 RGB
2.0 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
>1000 Hz
0 Hz
Inputs
Input Lag
9.1
8.9
Native Resolution @ Max Hz
3.2 ms
4.2 ms
Native Resolution @ 120Hz
4.6 ms
5.5 ms
Native Resolution @ 60Hz
8.7 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
5.0
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
Xbox Series X|S Compatibility
5.0
7.1
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
Inputs
Inputs 1
Inputs 2
DisplayPort
2 (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
Controllable
No
Multiple Input Display
No
No
KVM Switch
No
No
Smart OS
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
G Pro 27i
SEE PRICE
Amazon.com27"
Q27G40XMN
SEE PRICE
Walmart.com
Xiaomi G Pro 27i
AOC Q27G40XMN
Comments
Xiaomi G Pro 27i vs AOC Q27G40XMN: Main Discussion
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