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AOC CQ27G2 Monitor Review

Tested using Methodology v1.1
Reviewed Aug 28, 2020 at 07:56 am
AOC CQ27G2 Picture
7.3
Mixed Usage
7.2
Office
8.1
Gaming
6.9
Multimedia
7.0
Media Creation
5.7
HDR Gaming
Size 27"
Resolution 2560x1440
Max Refresh Rate
144 Hz
Pixel Type
VA
Variable Refresh Rate
FreeSync

The AOC CQ27G2 is a decent 27 inch, 1440p monitor with a VA panel. It has a simple design, with a wide stand that supports the monitor well and okay ergonomics. Like most VA monitors, it has a high native contrast ratio, which delivers deep blacks, but this comes at the expense of viewing angles, which are disappointing. It delivers a great overall gaming experience, with low input lag and a fast response time, but like many VA monitors we've tested, there's noticeable motion smearing in dark scenes, which may be distracting. Room choice is important with this monitor, as it can't get very bright, so glare might be an issue in a bright room. Although it has a high contrast ratio, it has bad black uniformity, so it's also not a great choice for a pitch-black room.

Our Verdict

7.3 Mixed Usage

The AOC CQ27G2 is a decent monitor for most uses. The low input lag and great response time deliver a great overall gaming experience. It's also a decent choice for office use or multimedia, but the limited viewing angles might be an issue for some users. Although it has decent reflection handling, it can't get very bright, so it might not be the best choice if you're in a bright room.

Pros
  • High native contrast results in deep blacks.
  • Low input lag.
  • Excellent SDR color gamut.
Cons
  • Image degrades at an angle.
  • Mediocre peak brightness.
  • Bad black uniformity.
7.2 Office

The AOC CQ27G2 is a decent monitor for office use. The 27", 1440p screen is great for multitasking, as you can comfortably work with multiple windows open, and it has good text clarity. It has decent reflection handling, but it might not be bright enough if there's a lot of natural light. The stand has an okay range of ergonomic adjustments, so it should be comfortable for most people.

Pros
  • High native contrast results in deep blacks.
  • Low input lag.
  • Excellent SDR color gamut.
Cons
  • Image degrades at an angle.
  • Mediocre peak brightness.
  • Bad black uniformity.
8.1 Gaming

This is a great monitor for gaming. The AOC CQ27G2 has a fast response time at the max refresh rate, similar to other 144Hz VA monitors we've tested, but there's noticeable motion smearing in some dark scenes. It has low input lag for a responsive gaming experience, and it supports FreeSync variable refresh rate technology for a nearly tear-free gaming experience.

Pros
  • High native contrast results in deep blacks.
  • Low input lag.
  • Excellent SDR color gamut.
Cons
  • Noticeable motion smearing in dark scenes.
  • Image degrades at an angle.
  • Mediocre peak brightness.
  • Bad black uniformity.
6.9 Multimedia

This is an okay monitor for multimedia. The AOC CQ27G2's 27", 1440p display is great for watching videos, thanks to the high-resolution screen, high contrast ratio, and excellent uniformity. It has decent reflection handling, but it might not be bright enough if you're in a room with lots of natural light. It also has disappointing viewing angles, so it's not a good choice if you like to watch videos with other people.

Pros
  • High native contrast results in deep blacks.
  • Low input lag.
  • Excellent SDR color gamut.
Cons
  • Image degrades at an angle.
  • Mediocre peak brightness.
  • Bad black uniformity.
7.0 Media Creation

The AOC CQ27G2 is a decent monitor for media creation. The 27" 1440p screen makes it easier to see more of your work at once. It has an outstanding SDR color gamut, with great coverage of the Adobe RGB color space, and excellent uniformity with no noticeable color bleed. Unfortunately, it's best enjoyed from directly in front due to the disappointing viewing angles, so it's not a great choice if you often share your screen with a colleague or client.

Pros
  • High native contrast results in deep blacks.
  • Low input lag.
  • Excellent SDR color gamut.
Cons
  • Image degrades at an angle.
  • Mediocre peak brightness.
  • Bad black uniformity.
5.7 HDR Gaming
  • 7.3 Mixed Usage
  • 7.2 Office
  • 8.1 Gaming
  • 6.9 Multimedia
  • 7.0 Media Creation
  • 5.7 HDR Gaming

Test Results

perceptual testing image
Design
Design
Style
Curved Yes
Curve Radius 1500R
Weight (without stand)
9.0 lbs (4.1 kg)
Weight (with stand)
11.9 lbs (5.4 kg)

The AOC CQ27G2 has a very similar design to the AOC CQ27G1, but with a silver stand instead of black. It has a slightly more aggressive curve, which is noticeable, but not as distracting as the 1000R curve on the Samsung Odyssey G7. The E.U. equivalent model, the AOC CQ27G2U, has a black stand and looks nearly identical to the AOC CQ27G1.

Design
Stand
Width
17.2" (43.7 cm)
Depth
9.1" (23.0 cm)

The stand is wide, but there's plenty of space in front to place small objects. It supports the monitor well, with very little wobble.

6.7
Design
Ergonomics
Height Adjustment
5.1" (13.0 cm)
Switch Portrait/Landscape No
Swivel Range -30° to 30°
Tilt Range -20° to 5°

The AOC CQ27G2 has okay ergonomics, with a great height adjustment, good swivel range, and great tilt range. It doesn't rotate, but this is normal for curved monitors.

Design
Back
Wall Mount VESA 100x100

The back has a simple design similar to other AOC monitors we've tested. There's no RGB lighting, but there's a small hole in the back of the stand for cable management. There's also a quick release button on the back.

Design
Borders
Borders
0.3" (0.8 cm)

The borders are thin on three sides, making this a good choice for a multi-monitor setup.

Design
Thickness
Thickness (with stand)
7.7" (19.5 cm)
Thickness (without stand)
2.9" (7.3 cm)

The curved display means this monitor takes up a bit more space than flat monitors, even when VESA-mounted.

7.5
Design
Build Quality

The AOC CQ27G2 has good overall build quality. Although almost entirely made of plastic, it feels decently solid. There are no noticeable gaps, and the bottom of the border is uniform. AOC doesn't appear to have made any changes to the overall construction compared to the AOC CQ27G1.

Picture Quality
8.3
Picture Quality
Contrast
Native Contrast
3858 : 1
Contrast With Local Dimming
N/A

Like most VA monitors, the AOC CQ27G2 27" has a great contrast ratio, resulting in deep blacks in dark scenes. Our results are a bit higher than AOC's posted typical contrast (3000:1), but it's normal for this to vary between units, so ours may simply be better than average. If you have this monitor and can measure the contrast ratio, let us know in the discussions.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

This monitor doesn't support local dimming. The video is provided for reference only.

6.3
Picture Quality
SDR Peak Brightness
SDR Real Scene
225 cd/m²
SDR Peak 2% Window
196 cd/m²
SDR Peak 10% Window
196 cd/m²
SDR Peak 25% Window
197 cd/m²
SDR Peak 50% Window
197 cd/m²
SDR Peak 100% Window
197 cd/m²
SDR Sustained 2% Window
196 cd/m²
SDR Sustained 10% Window
196 cd/m²
SDR Sustained 25% Window
196 cd/m²
SDR Sustained 50% Window
197 cd/m²
SDR Sustained 100% Window
197 cd/m²
SDR ABL
0.000

Unfortunately, the AOC CQ27G2 27 has mediocre peak brightness. It's slightly dimmer than the AOC CQ27G1 we tested, although this is likely due to panel variance. While it's bright enough for most rooms, it might not be bright enough if you have a lot of natural light. If you want a similar monitor that can get brighter, check out the Gigabyte G27QC.

0
Picture Quality
HDR Peak Brightness
HDR Real Scene
N/A
HDR Peak 2% Window
N/A
HDR Peak 10% Window
N/A
HDR Peak 25% Window
N/A
HDR Peak 50% Window
N/A
HDR Peak 100% Window
N/A
HDR Sustained 2% Window
N/A
HDR Sustained 10% Window
N/A
HDR Sustained 25% Window
N/A
HDR Sustained 50% Window
N/A
HDR Sustained 100% Window
N/A
HDR ABL
N/A

This monitor doesn't support HDR.

5.5
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
25 °
Color Washout From Right
25 °
Color Shift From Left
41 °
Color Shift From Right
42 °
Brightness Loss From Left
28 °
Brightness Loss From Right
28 °
Black Level Raise From Left
16 °
Black Level Raise From Right
16 °
Gamma Shift From Left
18 °
Gamma Shift From Right
17 °

Like most VA monitors, the horizontal viewing angle is disappointing. This monitor is best enjoyed sitting directly in front of it. Note that our tests don't account for the curvature of the screen.

5.1
Picture Quality
Vertical Viewing Angle
Color Washout From Below
26 °
Color Washout From Above
27 °
Color Shift From Below
41 °
Color Shift From Above
40 °
Brightness Loss From Below
29 °
Brightness Loss From Above
30 °
Black Level Raise From Below
11 °
Black Level Raise From Above
11 °
Gamma Shift From Below
11 °
Gamma Shift From Above
10 °

Disappointing vertical viewing angles, which is normal for VA panels. This isn't a good choice if your monitor isn't mounted at eye-level, or if you often share your screen with someone standing beside you.

8.5
Picture Quality
Gray Uniformity
50% Std. Dev.
2.125 %
50% DSE
0.120 %
5% Std. Dev.
1.273 %
5% DSE
0.084 %

Overall, the AOC CQ27G2 27" has excellent uniformity. There are some noticeable dark patches throughout the display, and the sides are a bit darker, but it's not very noticeable with regular content. Near-dark scenes have much better uniformity, with no noticeable issues. Note that uniformity varies a bit between units, so your results may vary from ours.

3.0
Picture Quality
Black Uniformity
Native Std. Dev.
3.987 %
Std. Dev. w/ L.D.
N/A

Unfortunately, the AOC CQ27G2 that we tested has bad black uniformity. There's noticeable flashlighting along the top and bottom bezel, and it can be distracting if you're in a dark room. This varies between units, though, so let us know if you get one with better black uniformity than ours.

8.3
Picture Quality
Pre Calibration
Picture Mode
Sports
Luminance
208 cd/m²
Luminance Settings
100
Contrast Setting
50
RGB Controls
Warm
Gamma Setting
Gamma 1
Color Temperature
6276 K
White Balance dE
1.70
Color dE
2.71
Gamma
2.22

Out of the box, the AOC CQ27G2 has great accuracy. There are no noticeable issues in shades of gray, and most colors are displayed accurately. Gamma is almost flat, close to 2.2 instead of following the sRGB target curve, so some scenes are darker than they should be.

9.5
Picture Quality
Post Calibration
Picture Mode
Standard
Luminance
100 cd/m²
Luminance Settings
37
Contrast Setting
50
RGB Controls
42-46-50
Gamma Setting
Gamma 1
Color Temperature
6518 K
White Balance dE
0.47
Color dE
0.88
Gamma
2.20

After calibration, the AOC CQ27G2 is extremely accurate. There are no noticeable issues with the white balance, gamma follows the target curve almost perfectly, and most colors are displayed accurately, except for pure blue, which is significantly undersaturated.

You can download our ICC profile calibration here. This is provided for reference only and shouldn't be used, as the calibration values vary per individual unit even for the same model, due to manufacturing tolerances.

8.9
Picture Quality
SDR Color Gamut
sRGB xy
97.5 %
Adobe RGB xy
81.4 %
sRGB Picture Mode
Standard
Adobe RGB Picture Mode
Standard

Excellent SDR color gamut, with essentially perfect coverage of the sRGB color space used by most content. It also has great coverage of the Adobe RGB color space often used for professional photo editing.

9.4
Picture Quality
SDR Color Volume
sRGB In ICtCp
99.0 %
Adobe RGB In ICtCp
89.4 %
sRGB Picture Mode
Standard
Adobe RGB Picture Mode
Standard

Outstanding SDR Color Volume. It can display dark, saturated colors thanks to the high contrast ratio, and most colors are as bright as pure white. Unfortunately, pure blues aren't very bright, but this is pretty common for LCDs.

0
Picture Quality
HDR Color Gamut
Wide Color Gamut
N/A
DCI P3 xy
N/A
Rec. 2020 xy
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR

This monitor doesn't support HDR.

0
Picture Quality
HDR Color Volume
DCI-P3 In ICtCp
N/A
Rec. 2020 In ICtCp
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR

This monitor doesn't support HDR.

10
Picture Quality
Image Retention
IR After 0 Min Recovery
0.00 %
IR After 2 Min Recovery
0.00 %
IR After 4 Min Recovery
0.00 %
IR After 6 Min Recovery
0.00 %
IR After 8 Min Recovery
0.00 %
IR After 10 Min Recovery
0.00 %

There are no signs of temporary image retention on our unit, but this can vary between units.

8.2
Picture Quality
Gradient
Color Depth
8 Bit

Great gradient handling, almost identical to the AOC CQ27G1. There's noticeable 8-bit banding in darker shades, but this shouldn't be an issue for most people.

10
Picture Quality
Color Bleed
Pixel Row Error
0.001 %
Pixel Column Error
0.001 %

There are no noticeable signs of color bleed.

7.4
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
5.8 %
Indirect Reflections
3.8 %
Calculated Direct Reflections
2.0 %

Decent reflection handling, good enough for most rooms.

7.5
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

Good text clarity, better than the AOC CQ27G1. It's recommended to run the ClearType tuner in Windows, as diagonal or curved lines are noticeably clearer, as seen in the top photo.

Motion
8.1
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Strong
Rise / Fall Time
5.9 ms
Total Response Time
13.1 ms
Overshoot Error
1.5 %
Dark Rise / Fall Time
10.9 ms
Dark Total Response Time
23.1 ms
Dark Overshoot Error
3.0 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Weak Chart Table Photo
Medium Chart Table Photo
Strong Chart Table Photo

Great response time at the max refresh rate. There's some overshoot in a few transitions, and dark scene transitions are significantly slower, causing noticeable motion smearing in dark scenes. This can be seen in the dark lines to the left of our logo in the pursuit camera photo. The level of overdrive can be adjusted, but there's very little difference between them, so we recommend the highest setting, 'Strong'.

Overall, motion looks similar to other 144Hz VA monitors we've tested, like the LG 32GK650F-B and the Nixeus EDG 34.

7.2
Motion
Response Time @ 60Hz
Best Overdrive Setting
Strong
Rise / Fall Time
4.5 ms
Total Response Time
19.5 ms
Overshoot Error
7.9 %
Dark Rise / Fall Time
5.8 ms
Dark Total Response Time
26.7 ms
Dark Overshoot Error
15.8 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Weak Chart Table Photo
Medium Chart Table Photo
Strong Chart Table Photo

The 60Hz response time is decent. Like at the max refresh rate, there's very little difference between the overdrive settings, and 'Strong' is still the best. There's significant overshoot in dark scenes, causing noticeable motion smearing in dark scenes, which is somewhat common for VA panels.

10
Motion
Image Flicker
Flicker-Free Yes
PWM Dimming Frequency
0 Hz

The backlight is completely flicker-free at all brightness levels.

7.0
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
Yes
BFI Maximum Frequency
144 Hz
BFI Minimum Frequency
100 Hz

The AOC CQ27G2 has a decent black frame insertion feature. BFI can be activated through the "Boost" overdrive setting, or by adjusting the MBR setting. Our measurements and photos were taken with the "Boost" setting, which appears to be either a specially tuned BFI mode, or a combination of overdrive and BFI. Increasing the MBR setting decreases the amount of time each frame is visible on the screen, causing the apparent brightness to decrease, but improving the appearance of motion.

9.0
Motion
Refresh Rate
Native
144 Hz
Max Refresh Rate
144 Hz
Variable Refresh Rate
Yes
FreeSync
Yes
G-SYNC
Compatible (Tested)
VRR Maximum
144 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors DisplayPort, HDMI

The 144Hz refresh rate is excellent for gaming and desktop use. It's FreeSync certified, and although it's not officially certified by NVIDIA, we could enable G-SYNC compatible mode when connected to our RTX 2070 Super over DisplayPort.

Inputs
9.6
Inputs
Input Lag
Native Resolution
3.7 ms
Native Resolution @ 60Hz
8.6 ms
Variable Refresh Rate
4.1 ms
Variable Refresh Rate @ 60Hz
9.2 ms
10 Bit HDR
N/A
Black Frame Insertion (BFI)
5.1 ms

Outstanding low input lag, even for console gamers at 60Hz. As there are two BFI modes: Boost and MBR, we measured both. The posted results are with the Boost mode; with the MBR mode at 20, we measured 5.5ms of input lag.

8.3
Inputs
Resolution And Size
Native Resolution 2560 x 1440
Aspect Ratio 16:9
Megapixels 3.7 MP
Pixel Density