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Reviewed on Feb 27, 2018 , Ian Cumming, Mehdi Azzabi, Eric Bousquet

ASUS PB277Q
MONITOR REVIEW

Usage Ratings - Version 1.0

Test Benches:

  • 1.0: Fall 2017
7.2
Mixed Usage
Score components:
Size : 27 "
Resolution : 2560x1440
Refresh Rate : 75 Hz
LCD Type
What it is: Type of LCD technology used by the monitor.
When it matters: Different technologies have different viewing angle properties.
:
TN
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
No

The Asus PB277Q is a decent 27 inch TN-type LCD monitor with a 75 Hz refresh rate and low input lag for gaming. It has better than average motion handling thanks to its very fast response time and can get bright to overcome ambient glare. Unfortunately, though, its very limited viewing angle and mediocre picture quality reduce its versatility significantly.

Test Results
Design 7.5
Picture Quality 6.2
Motion 7.8
Inputs 8.9
Pros
  • Decently bright
  • Flicker-Free backlight
Cons
  • Poor viewing angle
  • Mediocre picture quality

Check Price

7.5

Design

Score components: Subjectively assigned
ASUS PB277Q Design Picture
Curved : No
Curve radius : N/A
Weight (without stand) : 8.8lbs (4.0 kg)
Weight (with stand) : 15.7lbs (7.1 kg)

The design of the Asus PB277Q is good. It doesn't really stand out but looks quite clean and minimalistic from the front. The stand has a small footprint, but does support the monitor well. The monitor has a decent range of ergonomic adjustments, and some basic cable management at the back to keep a tidy desk. 

Update 07/04/2018: Weight (with stand) and Weight (without stand) have been added to the review.

Stand
ASUS PB277Q Stand picture
Width : 11.0" (28.0 cm)
Depth : 8.5" (21.7 cm)

The stand of this Asus monitor has a relatively small footprint but still supports the display well and feels stable.

8.1 Ergonomics
What it is: How much the position of the screen can be adjusted to match the viewing preference of the user.
When it matters: All usages, but especially office and gaming use.
Score components:
  • 46% Height Adjustment
  • 18% Switch portrait/landscape
  • 18% Swivel Range
  • 18% Tilt Range
ASUS PB277Q Ergonomics picture
Height Adjustment : 4.7" (11.9 cm)
Switch portrait/landscape : Yes
Swivel Range : -60° to 60°
Tilt Range : -17.5° to 5°

The monitor has a great range of ergonomic adjustments available, and most importantly, the height can be adjusted within a fairly good range. The monitor swivels left and right, however, it always drags on the table surface so it isn't as smooth as other monitors.

Back
ASUS PB277Q Back picture
Wall Mount : VESA 100x100

The rear of the monitor looks good, with a textured plastic finish. The clip at the back of the stand is useful for cable management, as shown here.

Borders
ASUS PB277Q Borders picture
Borders : 0.5" (1.3 cm)

The borders of the monitor are relatively thin, and look good. There is a small gap between the edge of the border and the first pixels.

Thickness
ASUS PB277Q Thickness picture
Thickness (with stand) : 6.0" (15.3 cm)
Thickness (without stand) : 2.7" (6.8 cm)

The monitor is quite thin when viewed from the side. It can be moved close to a wall when the stand is attached, and also sits close to a VESA mount.

7.5 Build Quality
What it is: How well built and sturdy the monitor is, and how good the materials used to build it are.
When it matters: All usages.
Score components: Subjectively assigned
ASUS PB277Q Build Quality picture

The build quality of this ASUS monitor is good. Although almost entirely plastic, the texture and feel are good. The height adjustment and rotation also feels high quality.

The Asus PB277Q picture quality is not bad. The low contrast ratio and terrible black uniformity mean that dark room performance could be better, especially when displaying dark content. Luckily, when the monitor is set in a brighter environment, the picture quality is more decent and the peak brightness is high enough so that it can easily fight glare from a bright lamp or windows.

The viewing angles are a bit disappointing for a PC monitor, especially if the monitor is viewed from the top. The gray uniformity is very good though, and distraction like the dirty screen effect is not noticeable here. Out of the box, the monitor accuracy is excellent and covers almost completely the sRGB color space. Finally, the monitor does not have more advanced features like local dimming and HDR support but offers a decent performance.

5.6 Contrast
What it is: Brightness difference between white and black. This is the main component of picture quality.
When it matters: Always, but especially when watching dark scenes.
Score components:
ASUS PB277Q Checkerboard Picture
Native Contrast
What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
779 : 1
Contrast with local dimming
What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
N/A

The Asus PB277Q monitor has a disappointing contrast ratio. As with other monitors using a TN panel, dark room performance is not great as blacks tend to look gray and give a washed out look to dark scenes in multimedia content. When used in a brighter room, like an office space, the picture quality is much better, black tends to look deeper when there is some ambient light. Since the PB277Q does not have a local dimming feature, the contrast ratio can be raised further.

0 Local Dimming
What it is: The lights behind the LCD layer adapt to the picture displayed, improving the contrast ratio.
When it matters: Dark scenes viewed in a dark room.
Score components: Subjectively assigned
Local Dimming
What it is: Whether it has a feature that controls the LEDs behind the LCD layer, to match the picture and darkens the dark portion of it.
When it matters: On LED TVs only. Dark scenes viewed in a dark room.
:
No
Backlight
What it is: Configuration of the lights of the backlight.
When it matters: Effectiveness of the local dimming.
Good value: Full-array/direct lighting is better for local dimming. As for the uniformity of the screen, it depends on the implementation. Some edge-lit monitors have more uniform blacks than some full-array monitors.
:
Direct

The Asus PB277Q monitor does not have a local dimming feature. The video is for reference only.

8.0 SDR Peak Brightness
What it is: How bright the screen can get. Measured with local dimming and with SDR content.
When it matters: Bright living rooms; bright objects; SDR content.
SDR Real Scene
What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. Our Real Scene was selected to represent a more regular movie condition. All measurements are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming on, max backlight and with an SDR signal. Scene: here.
When it matters: When watching movies and TV shows in SDR.
:
344 cd/m²
SDR Peak 2% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, present on screen for a short time
:
357 cd/m²
SDR Peak 10% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, present on screen for a short time
:
357 cd/m²
SDR Peak 25% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
357 cd/m²
SDR Peak 50% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
356 cd/m²
SDR Peak 100% Window
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
357 cd/m²
SDR Sustained 2% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, persistent during a scene.
:
357 cd/m²
SDR Sustained 10% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, persistent during a scene.
:
356 cd/m²
SDR Sustained 25% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
357 cd/m²
SDR Sustained 50% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
356 cd/m²
SDR Sustained 100% Window
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the monitor set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: When watching in a bright room.
:
356 cd/m²
SDR ABL
What it is: The standard deviation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
:
0.000

The ASUS PB277Q has a good peak brightness while displaying SDR content. At around 300 nits on average, it should be bright enough to be enjoyable in most viewing environments.

0 HDR Peak Brightness
What it is: How bright the screen can get. Measured with local dimming and with HDR content.
When it matters: HDR content
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

HDR is not supported.

5.3 Horizontal Viewing Angle
What it is: Color accuracy when viewed from the side.
ASUS PB277Q Horizontal Color Shift Picture
Color Shift from Left
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left
Good value: > 50°
Noticeable difference: 10°
:
31 °
Color Shift from Right
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right
Good value: > 50°
Noticeable difference: 10°
:
32 °
ASUS PB277Q Horizontal Brightness Picture
Brightness from Left
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your left.
Good value: > 50°
Noticeable difference: 10°
:
49 °
Brightness from Right
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
48 °
ASUS PB277Q Horizontal Black Level Picture
Black Level from Left
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
24 °
Black Level from Right
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When sharing your monitor with people on your right.
Good value: > 50°
Noticeable difference: 10°
:
19 °
Curve Radius : N/A

Poor horizontal viewing angle. While red shades remain particularly accurate when viewed at an angle, the PB277Q behaves as expected of a TN-type LCD monitor. Its black level rises very quickly when moving off axis, causing contrast and picture quality to diminish significantly.

5.8 Vertical Viewing Angle
What it is: Color accuracy when viewed from the top or bottom.
ASUS PB277Q Vertical Color Shift Picture
Color Shift from Below
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
9 °
Color Shift from Above
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor when standing up.
Good value: > 50°
Noticeable difference: 10°
:
34 °
ASUS PB277Q Vertical Brightness Picture
Brightness from Below
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
13 °
Brightness from Above
What it is: Angle where the brightness drops to 50% of the brightness directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
37 °
ASUS PB277Q Vertical Black Level Picture
Black Level from Below
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
21 °
Black Level from Above
What it is: Angle where the black level drops to 50% of the black level directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor while standing up.
Good value: > 50°
Noticeable difference: 10°
:
48 °

The Asus PB277Q's vertical viewing angle, while being slightly better than the average TN-type monitor, is still quite lacking. When viewed from below, colors shift dramatically to inverted tones, and the loss of brightness is both very rapid and significant. Its picture quality is retained a little better when looking at it from above, however, making this less of an issue for those that often look at their monitors while standing up.

7.7 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
ASUS PB277Q 50% Uniformity Picture
50% Std. Dev.
What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
6.166 %
50% DSE
What it is: Dirty Screen Effect. High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Solid colors. Sports, panning shots.
Good value: < 0.165%
Noticeable difference: 0.025%
:
0.127 %
ASUS PB277Q 5% Uniformity Picture
5% Std. Dev.
What it is: Average squared difference of pixels when displaying a mid 5% gray.
When it matters: Dark scenes.
Good value: < 1.15%
Noticeable difference: 1%
:
1.095 %
5% DSE
What it is: Dirty Screen Effect. High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.069 %

Very good gray uniformity for this Asus monitor, especially the 50% gray. This results in a uniform image, with very little dirty screen effect even when playing sports games or scrolling through web pages. On the test picture, we can see that the top of the screen is a bit darker, but this is due to the sub-par vertical viewing angle which results in a different shade when viewed at a small angle. Besides this, there is a visible warmer zone near the center, but this isn't really an issue.

When it comes to the 5% gray uniformity, the PB277Q is even better. The bottom edge is slightly brighter, and this is mainly caused by the backlight bleed that is also visible on the black uniformity test picture. Overall, this results in an improved dark scene performance.

2.9 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
ASUS PB277Q Native Black Uniformity Picture
Native Std. Dev.
What it is: Average of the squared difference of the blacks.
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
4.079 %
Std. Dev. w/ L.D.
What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
N/A

This monitor black uniformity is terrible. The monitor suffers from major backlight bleed and all edges are very bright. This shows up as soon that you display anything really dark and is particularly bad when displaying movies or video games with dark scenes.

9.0 Pre Calibration
What it is: Monitor's color accuracy before a full calibration. The measurements are taken with out of the box 'factory setting'.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
ASUS PB277Q Pre Calibration Picture ASUS PB277Q Pre Gamma Curve Picture ASUS PB277Q Pre Color Picture
Picture Mode
What it is: The picture mode that was used to do the pre-calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
Standard
Luminance
What it is: The luminance at which the pre-calibration reading was done. This represents the luminance of the monitor when it is at the factory default settings.
:
332 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
90
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
80
RGB controls
What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
Warm Color Temperature
Color Temperature
What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6669 K
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
1.29
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
1.58
Gamma
What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.15

Out of the box, we were able to achieve an excellent pre-calibration measurement with this Asus monitor. When set on the 'Standard' picture mode and the 'Warm' color temperature, both the white balance dE and color dE were just over the 1.0, which for most people would be perfect, as only professional might be able to detect any accuracy at this level.

The color temperature is really close to our 6500K target and the overall gamma, just a bit short of our 2.2 target, but the gamma curve is tracking very closely the target curve, which is better than most monitors out of the box.

9.5 Post Calibration
What it is: Monitor's color accuracy after a full calibration with a spectrophotometer.
When it matters: All graphics and video content on a monitor that has been professionally calibrated.
Score components:
ASUS PB277Q Post Calibration Picture ASUS PB277Q Post Gamma Curve Picture ASUS PB277Q Post Color Picture
Picture Mode
What it is: The picture mode that was used to do the calibration reading. We usually go for the picture mode that gives us the more control over all the picture quality setting.
:
Standard
Luminance
What it is: The luminance at which the calibration was executed. We aim for a luminance level of 100 cd/m².
:
100 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
24
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
70
RGB controls
What it is: This is the value for each color (red, green, and blue) used in the monitor internal RGB cuts/gains controls. If the monitor does not have an internal RGB cuts/gains controls, then the color temperature setting will be used instead, and the color temperature that gives us the best result will be used.
:
91-95-98
Color Temperature
What it is: The color temperature is a measure of the color of light. A colder color temperature (7000K) will look bluer and a warmer color temperature (4000K) will look yellower/redder. 6500K is the standard color for PC monitors and also for the sRGB color standard.
When it matters: When you care about color reproduction and accuracy.
Good value: 6500K
Noticeable difference: 400K
:
6391 K
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.74
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
0.74
Gamma
What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.18

After calibration, the monitor accuracy is only marginally better since it was already excellent out of the box. The biggest correction was done on the colors, which are now mostly right on target, especially the 100% primaries. The rest of the corrections were very small and overall, this is a remarkable accuracy for a PC monitor.

You can download our ICC profile calibration here.

8.6 SDR Color Gamut
What it is: The palette of colors the monitor can display
When it matters: General content consumption or production
Score components:
ASUS PB277Q Color Gamut s.RGB Picture
s.RGB xy
What it is: Coverage of the s.RGB colorspace on CIE 1931 xy.
When it matters: Almost all content. Includes websites, standard windows environment and SDR movies
Good value: > 95%
Noticeable difference: 5%
:
97.9 %
ASUS PB277Q Color Gamut ARGB Picture
Adobe RGB xy
What it is: Coverage of the Adobe RGB colorspace on CIE 1931 xy.
When it matters: Professional photography.
Good value: > 90%
Noticeable difference: 5%
:
74.0 %

Good SDR color gamut. The PB277Q's s.RGB coverage is almost perfect, with very minimal deficiency in the green primary. Unfortunately, though, it lacks proper support for the wider Adobe RGB color space.

8.4 SDR Color Volume
What it is: How much of the SDR color spaces the monitor can reproduce
When it matters: General usage and SDR media creation
Score components:
ASUS PB277Q s.RGB Color Volume ITP picture
s.RGB in ICtCp
What it is: How much of the s.RGB colorspace a monitor can display at different luminosity levels
When it matters: Most content, including web, SDR video games, and SDR media creation
:
91.3 %
ASUS PB277Q Adobe RGB Color Volume ITP Picture
Adobe RGB in ICtCp
What it is: How much of the Adobe RGB colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness.
When it matters: Professional media creation
:
76.1 %

Good SDR color volume. This monitor's good coverage of standard gamuts helps it reproduce the equivalent volume well. Its main deficiency is caused by its poor contrast ratio, which stops it from being able to reproduce darker colors.

0 HDR Color Gamut
What it is: The monitor's ability to reproduce HDR color spaces
When it matters: HDR content consumption or media creation
Score components:
Wide Color Gamut
What it is: Whether the monitor can support wider color gamuts
When it matters: HDR content and media creation
:
No
DCI P3 xy
What it is: Coverage of the DCI P3 colorspace on CIE 1931 xy
When it matters: When consuming or producing HDR content.
:
N/A
Rec. 2020 xy
What it is: Coverage of the Rec.2020 colorspace on CIE 1931 xy.
When it matters: When consuming or producing HDR content.
Good value: > 90%
Noticeable difference: 5%
:
N/A

HDR color gamuts are not supported.

0 HDR Color Volume
What it is: How much of the HDR color spaces a monitor can display at different luminosity levels.
When it matters: HDR content consumption and production. Includes streaming services, UHD Blu-rays and HDR games.
Score components:
DCI-P3 in ICtCp
What it is: How much of the DCI-P3 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80%
Noticeable difference: 5%
:
N/A
Rec. 2020 in ICtCp
What it is: How much of the Rec. 2020 colorspace a monitor can display at different luminosity levels, normalized to the monitor's peak brightness output.
When it matters: HDR content.
Good value: 80 %
Noticeable difference: 5 %
:
N/A

HDR color gamuts are not supported.

10 Image Retention
What it is: How much a static image is retained on a monitor screen after a certain amount of time.
When it matters: When working or playing video games on your PC monitor.
ASUS PB277Q Image Retention Picture
IR after 0 min recovery
What it is: Image retention measured right after the static image exposure, without recovery time.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 2 min recovery
What it is: Image retention measured after a recovery time of 2 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect
Noticeable difference: 0.015%
:
0.00 %
IR after 4 min recovery
What it is: Image retention measured after a recovery time of 4 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 6 min recovery
What it is: Image retention measured after a recovery time of 6 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 8 min recovery
What it is: Image retention measured after a recovery time of 8 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %
IR after 10 min recovery
What it is: Image retention measured after a recovery time of 10 minutes.
When it matters: When changing use or right after changing the type of on screen content (i.e. stopping playing video game to watch a movie).
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0.00 %

Perfect result here as no image retention could be noticed while running our test.

8.4 Gradient
What it is: How finely levels of color can be displayed.
When it matters: Details in shadows, sky and skin tones. Matters more for HDR content.
Score components: Subjectively assigned
ASUS PB277Q Gradient Picture
Color Depth
What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like HDR video games or HDR UHD movies. Won't matter for regular Blu-ray movies, SDR video game or desktop environment content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
8 Bit

Great result on the gradient test for the Asus PB277Q. Beside the 8-bit banding due to the limitation of the monitor, very few issues (small color shades issues in the very dark colors) can be noticed, which is great.

10 Color Bleed
What it is: How much the color from one area of the screen affects the color in another area of the screen.
When it matters: All usages, but especially media creation.
Score components:
ASUS PB277Q Color bleed horizontal
Pixel row error
What it is: The amount of bleed that appears across the screen horizontally.
When it matters: General usage of a PC monitor, can appear when browsing the web or with media creation like graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %
ASUS PB277Q Color bleed vertical
Pixel column error
What it is: Amount of color bleeding that appears across the screen vertically.
When it matters: Most uses of a PC monitor. Can appear while browsing the web or when editing images or graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %

The Asus PB277Q does not produce color bleed.

7.5 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
ASUS PB277Q Average room ASUS PB277Q Average room off picture ASUS PB277Q Bright room off picture

The reflection handling of the Asus PB277Q is good. It has a light-matte finish which diffuses direct reflections on the screen, which is good for an average or dark room. For a bright room though, the reflections may be distracting.

7.8

Motion

Score components:

Motion looks good on the Asus PB277Q. It has outstanding pixel response time and a flicker-free backlight, which is great. However, it only has a fixed 75 Hz refresh rate without any variable refresh rate feature like FreeSync, making it not as good for gaming as many other gaming monitors.

10 Motion Blur
What it is: The performance of the pixel response time. Poor response time causes trails to follow moving objects. Response time is one of a few sources of motion blur.
When it matters: When there's fast movement on screen, such as during video games and sports.
Score components:
ASUS PB277Q Motion Blur Picture ASUS PB277Q Response Time Chart
80% Response Time
What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 8 ms
Noticeable difference: 4 ms
:
2.9 ms
100% Response Time
What it is: How quickly pixels can fully transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 20 ms
Noticeable difference: 10 ms
:
6.1 ms
Best Overdrive Setting
What it is: If the monitor has adjustable pixel overdrive settings, which one produces the best response time with minimal overshoot.
When it matters: When adjusting the monitor's settings to get the least possible motion blur.
:
60

Trace Free 0
Trace Free 40
Trace Free 60
Trace Free 80
Trace Free 100

Excellent pixel response time, even better than some other TN monitors like the AOC Agon AG271QX. This results in very little blur following fast moving content, which is great for fast paced gaming. Almost all the blur in the photo is due to 75 Hz persistence, which is great. 'Trace Free 60' was the most balanced overdrive setting; '80' was also very good, making the response time a little faster but also adding a bit more overshoot. Those who don't mind overshoot artifacts may prefer 'Trace Free 80', but most people will be better served by '60'.

7.5 Image Flicker
What it is: Luminosity pattern when displaying images
When it matters: Nearly all the time during PC monitor use, but especially during fast movement such as video games
ASUS PB277Q Backlight Picture
Flicker-free : Yes
PWM Dimming Frequency
What it is: Flickering pattern at different luminosities.
When it matters: For people sensitive to flickering.
Good value: N/A or high frequencies (> 300 Hz). Frequencies that are multiples of 60Hz are better.
:
0 Hz
Black Frame Insertion (BFI)
What it is: Option to turn screen black between frames
When it matters: Reduces eye tracking blur in motion
Good value: Yes
:
No
BFI Maximum Frequency
What it is: Highest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: Matches the native refresh rate
Noticeable difference: 20 Hz
:
N/A
BFI Minimum Frequency
What it is: Lowest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: 60 Hz
Noticeable difference: 20 Hz
:
N/A

The Asus PB277Q has a flicker-free backlight, which is great as it provides smooth motion when browsing the web or watching videos. Unfortunately, the monitor lacks an optional black frame insertion feature to add flicker which can be useful to clear up motion. Many people do find 75 Hz flicker distracting so it's not a big loss.

7.1 Refresh Rate
What it is: How frequently the monitor can refresh and show new frames, and whether it can vary its refresh rate in real time using technologies like G-sync and FreeSync.
When it matters: Mostly for gaming, but does provide a little better motion during normal usage.
Native
What it is: The frequency at which the monitor is capable of displaying images every second
When it matters: General usage, but better results are most important for gaming
Good value: >100 Hz
Noticeable difference: 15 Hz
:
75 Hz
Factory Overclock
What it is: The frequency at which the monitor's can be boosted to using its internal menu.
When it matters: Gaming and other usages where high frame rate content is consumed.
Good value: >100
Noticeable difference: 15
:
N/A
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
No
VRR Maximum
What it is: The maximum frequency covered by the Variable Refresh Rate feature of the monitor.
When it matters: Any time the VRR feature is enabled.
Good value: Matches Refresh rate
Noticeable difference: 10 Hz
:
N/A
VRR Minimum
What it is: The lowest frequency covered by the monitor's Variable Refresh Rate feature.
When it matters: When using the VRR feature of the monitor at lower frame rates.
Good value: 30 Hz
:
N/A
VRR Maximum With OC
What it is: The maximum frequency covered by the Variable Refresh Rate feature when the monitor's overclocking feature is used.
When it matters: When both the overclocking and VRR features are used.
Good value: Matching the overclocked refresh rate.
Noticeable difference: 10 hz
:
N/A
VRR Supported Connectors : N/A

The monitor has a fixed 75 Hz refresh rate, without any variable refresh rate features like FreeSync. While this is better than monitors with a fixed 60 Hz refresh rate and will be decent for most usages and gaming, it won't provide as good of a gaming experience as monitors with a higher refresh rate and a VRR implementation.

8.9

Inputs

Score components:

The Asus PB277Q has a large 27" 1440p panel, which will impress during almost any usage. It also has excellent low input lag, which is great for all usages but especially for gaming.

9.2 Input Lag
What it is: Delay between input and onscreen reaction.
When it matters: General usage of the mouse and gaming.
Native Resolution
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at its native refresh rate.
When it matters: General usage and while playing video games.
Good value: < 15 ms
Noticeable difference: 5 ms
:
7.1 ms
Non-Native Resolution
What it is:

Lowest input lag possible at the center of the screen, when the monitor is displaying an alternative resolution at its native refresh rate. The non-native resolution tested depends on the native resolution of the monitor, following this pattern unless otherwise specified in the Input Lag text:

Native Resolution Non-Native Resolution Tested
4k UHD QHD
QHD FHD
FHD 1600x900
3440x1440 2560x1080
2560x1080 1920x1080
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
Native Resolution @ 60 Hz
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at a refresh rate of 60 Hz.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.7 ms
Variable Refresh Rate
What it is: Lowest input lag possible at the center of the screen, when the monitor is using its Variable Refresh Rate feature at its native resolution.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
HDR
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying an HDR signal at its native resolution and refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
Black Frame Insertion (BFI)
What it is: Lowest input lag possible at the center of the screen, when BFI is enabled and the monitor is displaying a signal at the highest supported BFI refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A

Excellent low input lag. The input lag at 60 Hz is a little higher because of the lower frame rate, but it's still very good. Unfortunately, no non-native resolution can run at 75 Hz without using a custom resolution; they run at 60 Hz instead.

8.4 Resolution and Size
What it is: The number of pixels the monitor can display, and the surface area of its screen.
When it matters: All usages, but especially for office and media editing.
Score components:
Native Resolution : QHD, 2560 x 1440
Aspect Ratio : 16:9
Megapixels : 3.7 MP
Pixel Density : 109 PPI
Screen Diagonal : 26.9 inches
Screen Area : 310 sq inches

The monitor has a sharp 1440p resolution and a large 27" size, which will please during almost any usage.

Inputs
ASUS PB277Q Inputs 1

All inputs are located on the rear of the monitor.

Total Inputs
DisplayPort : 1 (DP 1.2)
Mini DisplayPort : No
HDMI : 1 (HDMI 1.4)
DVI : 1 (DVI-D, dual link)
VGA : 1
DisplayPort Out : No
USB : No
USB C : No
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : No
Digital Optical Audio Out : No
Analog Audio Out RCA : No

There is also a 3.5mm analog audio line in, which can feed the headphones and speakers.

Features

The Asus PB277Q has a well laid out on-screen display that is made even easier to navigate by using the mini-joystick on the side. The OSD contains all the standard features of a monitor like adjustable image and overdrive settings, plus a few other features like a picture-in-picture mode and a crosshair overlay. The monitor also has built-in speakers, but they don't get very loud.

Additional Features
What it is: Additional features found on the monitor
Score components:
Speakers
What it is: Whether or not the monitor features standalone speakers.
When it matters: When using your computer without headphones or a dedicated pair of speakers.
:
Yes
HDR10 : No

The monitor has built-in speakers that can be fed from the DisplayPort and HDMI inputs, or from a separate 3.5mm line in. Unfortunately, while they're loud enough for casual usage, they're not loud enough for explosions and loud sounds in movies or gaming.

There is also a picture-in-picture / picture-beside-picture feature that can show two inputs side by side, or one overlaid in a corner of the other. When the inputs are shown side by side their aspect ratio doesn't change, so if two 16:9 inputs are side by side they only occupy a quarter of the screen each.

The monitor also has two ASUS GamePlus features: a crosshair overlay in the center of the screen for games that don't have a crosshair, and a countdown timer overlay that can be placed in a corner of the screen.

On-Screen Display (OSD)
Controls
ASUS PB277Q Controls picture

On the side there is a series of buttons and one mini-joystick. One button is the power button, while the others activate quick settings. The mini-joystick is used to navigate the full OSD, and it works very well.

In The Box
ASUS PB277Q In The Box picture

  • Manual
  • VGA Cable
  • HDMI Cable
  • 3.5mm Aux cable

Differences between Sizes and Variants

We tested the 27" model (PB277Q). The PB278Q is another monitor in the same series, however, it has an IPS panel instead of the TN panel. We expect it to have better picture quality, especially when viewed at an angle, but slightly more motion blur.

If someone comes across a different type of panel or if their PB277Q doesn't correspond to our review, let us know and we will update the review. Note that some tests such as the gray uniformity may vary between individual units.

ASUS also has a range of monitors available in the 'Professional' series, some of which are listed below.

Model Size Resolution Refresh rate LCD Type Notes
PB238Q 23" 1920x1080 60Hz IPS  
PA248Q 24" 1920x1200 60Hz IPS Factory calibrated
PB277Q 27" 2560x1440 75Hz TN  
PB278Q 27" 2560x1440 60Hz IPS  
PB287Q 28" 3840x2160 60Hz TN  

Compared to other Monitors

ASUS PB277Q Group Shot Picture
Left: MSI Optix G27C. Middle: ASUS PB277Q. Right: Dell  S2716DG
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The ASUS PB277Q is a decent 1440p monitor which is great for gaming, however, for other usages, the sub-par picture quality is not ideal and another monitor may be a better choice. See our recommendations for the best gaming monitors under $200.

Dell U2715H

The Dell U2715H is better than the ASUS PB277Q. The U2715H uses an IPS panel, which has much wider viewing angles. The U2715H also has better black uniformity, although it still isn't great, this monitor is a better choice than the PB277Q for dark room viewing. The Dell has a DisplayPort Out port, which makes it very easy to chain multiple monitors together if your computer supports it. The ASUS PB277Q has a higher native refresh rate, so motion looks a bit smoother.

Dell U2518D

If you will be sitting right in front of the monitor and responsiveness is what you are after, the ASUS PB277Q is a better choice. For a monitor that will perform well in almost all usages and with HDR support, the Dell U2518D is a better choice. The PB277Q is better for gaming as it has lower input lag and faster response time. On the other hand, the U2518D has better viewing angles that make it more versatile for more usages. Also, the Dell U2518D has better gray uniformity so you will not notice any clouding when browsing the web. 

ASUS VG248QE

The ASUS PB277Q is a bit better than the ASUS VG248QE. The PB277Q is a larger sized monitor with a higher native resolution, so you can get more done at the same time or better enjoy your games with the larger screen. The PB277Q has a better vertical viewing angle, which is good if you are planning on wall mounting it above eye level. The ASUS VG248QE has a much higher native refresh rate, so motion in games looks smoother if your PC can run it.

AOC AGON AG271QX

The AOC AGON AG271QX is better than the ASUS PB277Q. The AGON AG271QX is a gaming oriented monitor, and has a much higher native refresh rate, so fast motion looks much smoother. The AOC also has better dark room performance with a higher native contrast ratio and better black uniformity.

MSI Optix G27C

The ASUS PB277Q is much better than the MSI Optix G27C. The PB277Q has better ergonomics, so it is easier to adjust to the most optimal viewing positions. There is less motion blur on the PB277Q due to the faster response time, and the higher screen resolution allows you to see more fine details when gaming.

Dell U2717D

The ASUS PB277Q is a bit better than the Dell U2717D, unless you need wide viewing angles. The ASUS PB277Q uses a TN type panel, which has a higher refresh rate but worse viewing angles. If you are sitting close to the 27" PB277Q, the edges can appear darker or washed out. The PB277Q has much lower input lag than the U2717D, great for gaming or even just browsing the web. The U2717D uses an IPS panel, which isn't as good for late night browsing in a dark room, but has wider viewing angles.

LG 27UD58-B

The LG 27UD58P-B is a 27" monitor at around the same budget but has an IPS panel and a high pixel density 4k screen. This results in better picture quality, especially when viewed from up close because the sides of the screen remain accurate. The 4k resolution is also great for multi-taskers, or for an office environment. Unfortunately, the motion handling isn't as good due to the higher response time, so if you're a gamer, then go with the ASUS PB277Q. For other uses or for people who care about picture quality then the LG 27UD58P-B is a better choice.

Samsung UE590

The Samsung UE590 is a 4k monitor with a 28" TN panel. It has poor picture quality due to the low peak brightness, poor viewing angles, and bad out-of-the-box color accuracy. The high resolution screen is a bonus though, which makes it easier to multitask or to play games with high detail. It also supports FreeSync, which is good to avoid screen tearing in games. Overall though, the ASUS PB277Q is a better choice due to the higher screen brightness to overcome reflection and the better motion handling.

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Conclusion
SEE PRICE
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7.2Mixed Usage
Score components:
The Asus PB277Q does a decent job with a mixed usage. It gets decently bright with normal content, and its slightly higher than standard refresh rate helps it feel responsive. It also has good ergonomic adjustments which make it easy to find a comfortable viewing position when in use for long periods of time. Unfortunately, its limited contrast and narrow viewing angle mean it won't produce a very pretty image, even when sitting directly in front.
Passable choice for usage in an office. The Asus PB277Q's good brightness and high resolution make it an acceptable candidate for most office settings despite the mediocre picture quality. While it does offer a fair range of adjustments with its stand, its limited swivel is particularly unfortunate, since the monitor's small viewing angle makes rotating the monitor a requirement for sharing the screen with colleagues to your side.
Very good gaming monitor. While its 75 Hz refresh rate might not be a large upgrade over standard monitors, this monitor's fast response time and low input lag makes it feel responsive and connected. Unfortunately, it lacks support for variable refresh rate technologies like FreeSync and the picture quality is only mediocre.
Ordinary monitor for consuming media. While the PB277Q's screen is quite uniform and gets bright, its low contrast ratio means that the picture will look quite flat when used in a darker environment. It also lacks support for HDR and wider color gamuts like DCI-P3 which can greatly enhance the viewing experience.
The Asus PB277Q is about average for media creation. It comes out of the box with decent accuracy, and its coverage of the standard RGB color space is good. Unfortunately, it lacks support for more professionally oriented colorspaces like Adobe RGB and DCI-P3, and its narrow viewing angles mean having a consistent and accurate picture can be quite difficult.
HDR is not supported. Only a few monitors support HDR, such as the Samsung CHG70.

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