Products
Acer Nitro XV275U P3biipx
AOC Q27G40XMN
Tested using Methodology v2.1.1
Updated Nov 13, 2025 05:16 PM
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Tested using Methodology v2.1.1
Updated Nov 12, 2025 02:41 PM
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Max Refresh Rate
170 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
Acer Nitro XV275U P3biipx
AOC Q27G40XMN
The Acer Nitro XV275U P3biipx and the AOC Q27G40XMN are both entry-level 1440p gaming monitors. They each feature Mini LED backlighting, but the AOC is the better choice for most people. This is because it has a better local dimming feature, so it has better picture quality in dark scenes, as there's less black crush. The AOC also has better color accuracy, and motion looks sharper with fast-moving objects. While both monitors get bright, the main advantage of the Acer is that it has better PQ EOTF tracking, so it displays most content at the intended brightness. The Acer also has much better ergonomics, making it easier to adjust.
Variants
- Nitro XV275U P3biipx (27")
- Q27G40XMN (27")
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Main Differences for
PC Gaming
PC Gaming
Threshold
PC Gaming
7.8
8.1
VRR Motion Performance
6.8
8.1
CAD @ 60Hz
4.5
7.1
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Build Quality
8.0
6.5
Build Quality Picture
Ergonomics
9.7
4.5
Ergonomics Picture
Back Picture
Height Adjustment
5.7" (14.6 cm)
0.0" (0.0 cm)
Min Height To Top Of Panel
17.0" (43.1 cm)
18.2" (46.2 cm)
Tilt Range
-25° to 5°
-20° to 5°
Rotate Portrait/Landscape
Yes, Both Ways
No
Swivel Range
-25° to 25°
No swivel
Wall Mount
VESA 75x75
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
21.7" (55.2 cm)
11.0" (28.0 cm)
Base Depth
10.6" (27.0 cm)
7.7" (19.5 cm)
Thickness (With Display)
8.7" (22.2 cm)
5.3" (13.5 cm)
Weight (With Display)
13.8 lbs (6.3 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
14.2" (36.0 cm)
14.3" (36.4 cm)
Thickness (Without Stand)
3.1" (8.0 cm)
2.5" (6.3 cm)
Weight (Without Stand)
9.6 lbs (4.4 kg)
11.9 lbs (5.4 kg)
Borders Size (Bezels)
0.4" (0.9 cm)
0.3" (0.8 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
External Brick
Internal
Picture Quality
Contrast
8.6
8.7
Checkerboard Picture
Native Contrast
4,559 : 1
4,361 : 1
Contrast With Local Dimming
4,720 : 1
21,609 : 1
Local Dimming
6.0
8.0
Local Dimming Video
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
SDR Brightness
8.6
8.5
Real Scene
580 cd/m²
505 cd/m²
Peak 2% Window
588 cd/m²
379 cd/m²
Peak 10% Window
588 cd/m²
511 cd/m²
Peak 25% Window
586 cd/m²
545 cd/m²
Peak 50% Window
583 cd/m²
556 cd/m²
Peak 100% Window
581 cd/m²
564 cd/m²
Sustained 2% Window
586 cd/m²
378 cd/m²
Sustained 10% Window
586 cd/m²
511 cd/m²
Sustained 25% Window
584 cd/m²
544 cd/m²
Sustained 50% Window
582 cd/m²
554 cd/m²
Sustained 100% Window
580 cd/m²
562 cd/m²
Automatic Brightness Limiting (ABL)
0.001
0.024
Minimum Brightness
37 cd/m²
38 cd/m²
HDR Brightness
9.1
9.1
EOTF
VESA DisplayHDR Certification
DisplayHDR 1000
DisplayHDR 1000
Real Scene
1,074 cd/m²
1,197 cd/m²
Peak 2% Window
797 cd/m²
978 cd/m²
Peak 10% Window
1,319 cd/m²
1,263 cd/m²
Peak 25% Window
1,548 cd/m²
861 cd/m²
Peak 50% Window
1,631 cd/m²
884 cd/m²
Peak 100% Window
1,320 cd/m²
899 cd/m²
Sustained 2% Window
792 cd/m²
968 cd/m²
Sustained 10% Window
1,316 cd/m²
1,246 cd/m²
Sustained 25% Window
1,543 cd/m²
858 cd/m²
Sustained 50% Window
1,613 cd/m²
879 cd/m²
Sustained 100% Window
1,109 cd/m²
893 cd/m²
Automatic Brightness Limiting (ABL)
0.036
0.020
Gray Uniformity
7.8
8.4
50% Uniformity Picture
50% Std. Dev.
2.109%
1.425%
50% DSE
0.168%
0.141%
Black Uniformity
7.7
6.3
Native Black Uniformity Picture
Native Std. Dev.
1.115%
2.233%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
0.326%
0.343%
Color Accuracy (Pre-Calibration)
7.3
9.0
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Standard (sRGB)
Standard (sRGB)
sRGB Gamut Area xy
95.7%
98.7%
White Balance dE (Avg.)
6.02
2.05
Color Temperature (Avg.)
6,452 K
6,289 K
Gamma (Avg.)
2.22
2.20
Color dE (Avg.)
3.75
1.69
Contrast Setting
N/A
N/A
RGB Settings
Default
Default
Gamma Setting
Default
Default
Brightness Setting
80
70
Measured Brightness
156 cd/m²
329 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.2
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
User
Standard
sRGB Gamut Area xy
95.0%
99.6%
White Balance dE (Avg.)
0.69
0.69
Color Temperature (Avg.)
6,480 K
6,520 K
Gamma (Avg.)
2.19
2.20
Color dE (Avg.)
0.82
0.38
Contrast Setting
50
50
RGB Settings
Gain (44, 50, 47), Bias (47, 47, 46)
47-49-38
Gamma Setting
2.2
2.2
Brightness Setting
30
15
Measured Brightness
102 cd/m²
101 cd/m²
SDR Color Gamut
9.2
9.8
sRGB Color Gamut Picture
sRGB Coverage xy
95.3%
99.6%
sRGB Picture Mode
User
Standard
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
96.4%
95.6%
Adobe RGB Picture Mode
User
Standard
HDR Color Gamut
8.5
8.1
Wide Color Gamut
Yes
Yes
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
92.2%
90.3%
DCI-P3 Picture Mode
HDR On
Display HDR
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
77.1%
74.9%
Rec. 2020 Picture Mode
HDR On
Display HDR
HDR Color Volume
8.6
8.5
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
83.2%
73.2%
DCI-P3 Picture Mode
HDR On
Display HDR
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
42.2%
42.7%
Rec. 2020 Picture Mode
HDR On
Display HDR
Viewing Angle
6.0
5.6
Viewing Angle Video
Chroma Graph
Color Washout From Left
29°
25°
Color Washout From Right
29°
26°
Hue Graph
Color Shift From Left
57°
30°
Color Shift From Right
65°
38°
Lightness Graph
Brightness Loss From Left
32°
26°
Brightness Loss From Right
32°
27°
Black Level Raise From Left
16°
36°
Black Level Raise From Right
17°
40°
Gamma Shift From Left
15°
13°
Gamma Shift From Right
18°
17°
Text Clarity
7.5
7.5
ClearType On
ClearType Off
Pixel Type
VA
VA
Pixels
Subpixel Layout
RGB
RGB
Direct Reflections
6.5
7.1
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
31.7%
24.3%
Screen Finish
Matte
Matte
Ambient Black Level Raise
8.9
7.4
Black Level Raise Picture
Ambient Black Level Raise Graph
Black Luminance @ 0 lx
0.01 cd/m²
0.00 cd/m²
Black Luminance @ 1000 lx
0.47 cd/m²
1.34 cd/m²
Total Reflected Light
5.5
5.9
Bright Room Off Picture
Total Reflection Ring Light Picture
Total Reflected Light Intensity
37,559% ⋅ pixel
32,492% ⋅ pixel
Diffraction Artifacts
No
No
Gradient
9.6
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
Motion
Refresh Rate
7.6
7.7
Native Refresh Rate
170 Hz
180 Hz
Max Refresh Rate
170 Hz
180 Hz
Max Refresh Rate Over DP
170 Hz
180 Hz
Max Refresh Rate Over HDMI
144 Hz
144 Hz
Max Refresh Rate Over DP @ 10-bit
170 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
170 Hz
180 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort, HDMI
VRR Motion Performance
6.8
8.1
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Freesync Premium (Normal)
Faster
Variable Overdrive Advertised
No
No
Avg. CAD
221
144
Best CAD
168
127
Worst CAD
354
173
Refresh Rate Compliance
7.5
8.1
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
53%
58%
Compliance @ 120 FPS
63%
69%
Compliance @ 60 FPS
73%
81%
CAD @ Max Refresh Rate
7.5
8.2
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD extreme
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Normal
Faster
Avg. CAD
168
127
Best 10% CAD
38
58
Worst 10% CAD
324
217
Response Time @ Max Refresh Rate
First Response Time
5.7 ms
4.3 ms
Total Response Time
8.4 ms
6.6 ms
Recommended Overdrive Setting
Normal
Faster
RGB Overshoot
6 RGB
4 RGB
Worst 10% RGB Overshoot
27 RGB
15 RGB
Worst 10% First Response Time
17.5 ms
12.0 ms
Worst 10% Total Response Time
17.5 ms
12.3 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
CAD @ 120Hz
7.0
8.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
OD extreme
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Normal
Faster
Avg. CAD
197
141
Best 10% CAD
37
54
Worst 10% CAD
421
247
Response Time @ 120Hz
Worst 10% First Response Time
8.9 ms
11.9 ms
RGB Overshoot
10 RGB
3 RGB
Total Response Time
9.4 ms
7.6 ms
First Response Time
4.2 ms
5.3 ms
Recommended Overdrive Setting
Normal
Faster
Worst 10% Total Response Time
17.5 ms
13.3 ms
Worst 10% RGB Overshoot
37 RGB
12 RGB
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
4.5
7.1
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD extreme
0 to 31
OD fast
0 to 31
Recommended Overdrive Setting
Normal
Faster
Avg. CAD
360
176
Best 10% CAD
47
58
Worst 10% CAD
1,086
431
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
Faster
First Response Time
4.1 ms
7.2 ms
Total Response Time
19.3 ms
10.1 ms
RGB Overshoot
14 RGB
2 RGB
Worst 10% Total Response Time
35.2 ms
21.9 ms
Worst 10% First Response Time
7.8 ms
17.4 ms
Worst 10% RGB Overshoot
45 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
5.4
8.7
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
1.6 RGB
0.5 RGB
Middle Gray Flicker
3.9 RGB
1.8 RGB
Light Gray Flicker
3.9 RGB
2.0 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
>1000 Hz
0 Hz
Inputs
Input Lag
8.9
8.9
Native Resolution @ Max Hz
3.9 ms
4.2 ms
Native Resolution @ 120Hz
5.0 ms
5.5 ms
Native Resolution @ 60Hz
9.0 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 1.2)
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
Presets
No
Multiple Input Display
No
No
KVM Switch
No
No
Smart OS
No
No
On-Screen Display (OSD)
OSD Picture
Check Price
27"
Nitro XV275U P3biipx
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Amazon.com
27"
Q27G40XMN
SEE PRICE
BestBuy.com
27"
Nitro XV275U P3biipx
SEARCH
B&H
27"
Q27G40XMN
SEE PRICE
Walmart.com
27"
Nitro XV275U P3biipx
SEARCH
BestBuy.com
27"
Q27G40XMN
SEARCH
Amazon.com
27"
Nitro XV275U P3biipx
SEARCH
Walmart.com
27"
Q27G40XMN
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Acer Nitro XV275U P3biipx
AOC Q27G40XMN
Comments
Acer Nitro XV275U P3biipx vs AOC Q27G40XMN: Main Discussion
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