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Reviewed on Aug 16, 2018 , Ian Cumming, Yannick Khong, Bruno St-Georges-Robert

Acer Predator X27
MONITOR REVIEW

Usage Ratings - Version 1.0

Test Benches:

  • 1.0: Fall 2017
8.0
Mixed Usage
Score components:
Size : 27 "
Resolution : 3840x2160
Refresh Rate : 120 Hz
LCD Type
What it is: Type of LCD technology used by the monitor.
When it matters: Different technologies have different viewing angle properties.
:
IPS
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.
:
G-Sync

The Acer X27 is a very good, versatile monitor that performs best in a bright room. It is marketed as a gaming monitor and has excellent gaming features, including NVIDIA G-Sync and a high refresh rate that delivers a remarkable gaming experience. It is a well-rounded monitor great for any use, and has an impressive wide color gamut and is incredibly bright in HDR. Unfortunately, it has poor dark room performance due to its low contrast ratio even with local dimming, and bad black uniformity.

Test Results
Design 8.0
Picture Quality 7.5
Motion 8.9
Inputs 8.7
Pros
  • Excellent wide color gamut
  • Excellent HDR brightness
  • Image remains accurate at an angle
Cons
  • Performs poorly in a dark room

Check Price

27" Predator X27
SEE PRICE
Amazon.com
8.0

Design

Score components: Subjectively assigned
Acer Predator X27 Design Picture
Curved : No
Curve radius : N/A
Weight (without stand) : 14.3lbs (6.5 kg)
Weight (with stand) : 17.4lbs (7.9 kg)

The Acer Predator X27 has a very good design with some interesting design choices. The stand is thin but has a large footprint. The monitor can be VESA mounted on a stand or wall mount, but an included adapter must be used, likely to help with heat dissipation. There is a fan on the back to keep the monitor cool, as the backlight generates a lot of heat, but the fan is very quiet. There is very little thought given to cable management. The included blinders can help reduce glare and are easy to attach when needed.

Stand
Acer Predator X27 Stand picture
Width : 18.7" (47.5 cm)
Depth : 11.3" (28.8 cm)

The stand has a very unique design. The legs appear very thin, but they support the monitor well.

6.1 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
Acer Predator X27 Ergonomics picture
Height Adjustment : 5.1" (13.0 cm)
Switch portrait/landscape : No
Swivel Range : -20° to 20°
Tilt Range : -22.5° to 5°

Mediocre ergonomic options. The height can be adjusted, and it can swivel and tilt, but the swivel range is limited compared to similar monitors like the ASUS ROG PG279Q. It cannot be rotated for a portrait orientation.

Back
Acer Predator X27 Back picture
Wall Mount : VESA 100x100

The back is clean, but not much thought was given to cable management. The Acer X27 can be VESA mounted, but it requires a special adapter that is included in the box.

There is a fan on the back of the monitor to help with heat dissipation. It is always running but is extremely quiet.

Note: There are multiple reports that the VESA adapter included in the box is the wrong one for the X27 as it will not allow the fan to breathe. Acer support will send a replacement bracket.

Borders
Acer Predator X27 Borders picture
Borders : 0.6" (1.6 cm)

The borders of the Acer X27 are of average thickness. There is no discernible gap between the borders and the screen. We measured the borders without the blinder screens.

Thickness
Acer Predator X27 Thickness picture
Thickness (with stand) : 10.0" (25.3 cm)
Thickness (without stand) : 3.1" (8.0 cm)

With the stand, the Acer X27 is very thick and cannot be easily placed against a wall. Without the stand, it is still thick but won't stick out too much when wall mounted.

8.0 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
Acer Predator X27 Build Quality picture

Good build quality with no major issues. There is a slight gap between the front and back covers, but this shouldn't cause any issues.

The Acer Predator X27 has decent picture quality. It is best suited for a bright room, as the native contrast makes blacks look gray in a dark room, and the black uniformity is bad. Bright room performance is good, and the viewing angles are decent. HDR picture quality is very good. The monitor is extremely bright in HDR and has a very good HDR color gamut and good color volume, better than most TVs even. Gradients are displayed nearly perfectly with no noticeable banding.

5.9 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:
Acer Predator X27 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
:
815 : 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
:
1339 : 1

Disappointing native contrast on the X27, slightly worse than the Acer Predator XB271HU, but to be expected from an IPS type panel. Dark room performance isn't great as blacks appear gray. Local dimming does help to improve the contrast ratio, but it still isn't as good as a VA type monitor like the MSI Optix G27C.

Update 08/17/2018: To clarify, we measure contrast ratio after calibration, which on some monitors results in a lower contrast ratio than out of the box. The X27's out of the box contrast ratio in the Standard picture mode is 975:1, but after calibration it became 815:1 because the Red and Green components of the monitor's white point had to be decreased significantly to match our target 6500K white point, as shown in the Post Calibration box.

Also the Contrast with local dimming was erroneously measured in HDR (resulting in 1568:1) rather than in SDR (resulting in 1339:1) as per our standard method. These values are similar enough that the difference won't be noticeable to most people. The value has been changed to the SDR measurement to be consistent with other monitors.

4.5 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.
:
Yes
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.
:
Full-Array

The monitor has a Backlight Response setting with three options: 'Gaming', 'Desktop' and 'Hybrid'. 'Gaming' makes the local dimming react almost instantly when the monitor's screen changes; 'Desktop' makes the monitor react to changes with a very slow fade (~5 seconds), and prioritizes maintaining bright parts of the screen rather than making adjacent dark areas darker; this makes the local dimming less distracting for desktop use. 'Hybrid' is a blend of the 'Gaming' and 'Desktop' behaviors. We recommend setting Backlight Response to 'Gaming' to start, then if you find the local dimming distracting you can select 'Hybrid', then 'Desktop' as needed.

Local dimming is available in SDR as well as HDR. In SDR, the SDR Variable Backlight option must be enabled. In SDR the peak brightness is limited to 300 cd/m², so the impact of local dimming is less noticeable.

7.5 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.
:
299 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
:
306 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
:
301 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.
:
300 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.
:
300 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.
:
301 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.
:
305 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.
:
301 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.
:
299 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.
:
299 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.
:
301 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
:
0.001

Good peak brightness with SDR content. There is very little fluctuation in brightness with different content. The Acer X27 is bright enough for most rooms but may have difficulty overcoming glare in a brightly lit room.

8.9 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 : 1127 cd/m²
HDR Peak 2% Window : 1070 cd/m²
HDR Peak 10% Window : 1122 cd/m²
HDR Peak 25% Window : 856 cd/m²
HDR Peak 50% Window : 706 cd/m²
HDR Peak 100% Window : 651 cd/m²
HDR Sustained 2% Window : 923 cd/m²
HDR Sustained 10% Window : 884 cd/m²
HDR Sustained 25% Window : 844 cd/m²
HDR Sustained 50% Window : 691 cd/m²
HDR Sustained 100% Window : 637 cd/m²
HDR ABL : 0.022

Excellent peak brightness in HDR, better even than most TVs. The brightness varies greatly depending on content. HDR movies or games are exceptionally bright and vivid.

7.1 Horizontal Viewing Angle
What it is: Color accuracy when viewed from the side.
Acer Predator X27 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°
:
35 °
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°
:
35 °
Acer Predator X27 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°
:
46 °
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°
:
45 °
Acer Predator X27 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°
:
75 °
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°
:
75 °
Curve Radius : N/A

Decent horizontal viewing angles. Colors shift significantly when viewing off center, but the overall brightness and contrast remains accurate to a decent off-center angle.

8.3 Vertical Viewing Angle
What it is: Color accuracy when viewed from the top or bottom.
Acer Predator X27 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°
:
30 °
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°
:
31 °
Acer Predator X27 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°
:
36 °
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 °
Acer Predator X27 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°
:
75 °
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°
:
75 °

Very good vertical viewing angles. There are no issues if this monitor is VESA mounted on a stand or wall above eye level.

8.8 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
Acer Predator X27 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%
:
2.887 %
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%
:
0.102 %
Acer Predator X27 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%
:
0.413 %
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%
:
0.061 %

Excellent gray uniformity. There is very little dirty screen effect and almost no visible banding. The corners of the screen are slightly darker than the rest, which can be noticeable when browsing the web in a dark room, but this shouldn't be a problem for most people.

3.7 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
Acer Predator X27 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.
:
3.046 %
Acer Predator X27 Black Uniformity Picture with Local Dimming
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.
:
4.982 %

Bad black uniformity on the Acer X27. There is severe clouding throughout the screen and backlight bleed in a few spots along the bottom edge. With local dimming enabled, the rest of the screen is effectively dimmed but there is still significant clouding around the test cross.

5.9 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:
Acer Predator X27 Pre Calibration Picture Acer Predator X27 Pre Gamma Curve Picture Acer Predator X27 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.
:
276 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
240
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
50
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.
:
50-50-50
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
:
6042 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
:
5.16
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
3.46
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

Disappointing accuracy out of the box. Acer calibrates each X27 at the factory to a target color temperature of 7000 K, but it is unclear which picture mode they calibrated under. We recommend the 'Standard' Picture Mode, as it provided the closest results to our target of 6500 K. The white balance dE is very high, and pure whites appear yellowish. Gamma follows our target nearly perfectly.

9.6 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:
Acer Predator X27 Post Calibration Picture Acer Predator X27 Post Gamma Curve Picture Acer Predator X27 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.
:
User
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.
:
98
Contrast Setting
What it is: The monitor contrast setting, usually ranging from 0 to 100.
:
50
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.
:
39-37-50
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
:
6497 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
:
0.51
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
0.54
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

Calibration was able to effectively eliminate all color inaccuracies. The Acer Predator X27 still tracks our gamma curve nearly perfectly. White and color balance is nearly perfect and most people won't be able to see any errors. The color temperature after calibration is nearly perfect for our target of 6500 K.

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

9.7 SDR Color Gamut
What it is: The palette of colors the monitor can display
When it matters: General content consumption or production
Score components:
Acer Predator X27 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%
:
95.5 %
Acer Predator X27 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%
:
98.1 %

sRGB Picture Mode: User (calibrated, SDR Colors sRGB = On)
Adobe RGB Picture Mode: User (SDR Colors sRGB = Off)

Excellent SDR color gamut, the best coverage we have tested so far. Nearly perfect coverage of the wider Adobe RGB color space, great for professional users for editing graphics or print media (see our recommendations for the best monitors for photo editing and graphic design).

9.8 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:
Acer Predator X27 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
:
97.4 %
Acer Predator X27 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
:
99.2 %

sRGB Picture Mode: User (SDR Colors sRGB = On)
Adobe RGB Picture Mode: User (SDR Colors sRGB = Off)

Excellent color volume. The Acer X27 covers the entire color space well, but is slightly limited by the contrast ratio and can't produce deep, dark colors. Colors are nearly as bright as pure white in SDR.

8.2 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
:
Yes
Acer Predator X27 Color Gamut DCI-P3 Picture
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.
:
85.8 %
Acer Predator X27 Color Gamut Rec.2020 Picture
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%
:
78.2 %

The Acer X27 displays a very good wide color gamut with HDR content. Coverage of the smaller DCI-P3 is excellent. Coverage of the wider Rec.2020 HDR10 color space is the best we have measured of any display, better even than the Samsung Q7FN or Q8FN.

7.7 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:
Acer Predator X27 P3 Color Volume ITP Picture
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%
:
80.8 %
Acer Predator X27 2020 Color Volume ITP Picture
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 %
:
73.0 %

Good color volume in HDR. Rec. 2020 color volume is almost as good as the Samsung Q7FN and Q8FN, but limited by the color gamut, and the monitor can't produce colors as bright as pure white. Overall, color volume is better than the other HDR monitors we have tested, including the Samsung CHG70.

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.
Acer Predator X27 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 %

There is no image retention on the X27, even immediately after displaying our static test image for 10 minutes.

9.8 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
Acer Predator X27 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.
:
10 Bit

Excellent gradient handling on the Acer Predator X27. Gradients are displayed nearly perfectly without banding.

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:
Acer Predator X27 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 %
Acer Predator X27 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%
:
0.001 %

There is no color bleed on the Acer Predator X27.

7.0 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
Acer Predator X27 Average room Acer Predator X27 Average room off picture Acer Predator X27 Bright room off picture

Decent reflection handling, but it is best to avoid direct light with the X27. The included blinders can help to reduce glare from side sources.

8.9

Motion

Score components:

The motion handling of the Acer Predator X27 is excellent. There is very little motion blur thanks to the fast response time, but there is some overshoot on all transitions. The monitor is flicker-free, which is great but lacks an optional Black Frame Insertion feature to reduce persistence blur.

9.5 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:
Acer Predator X27 Motion Blur Picture Acer Predator X27 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
:
3.4 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
:
10.1 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.
:
Normal

Over Drive Off
Over Drive Normal
Over Drive Extreme

Excellent motion handling on the Predator X27. Motion looks smooth and crisp, with no visible motion blur or duplications. The best Over Drive setting is 'Normal', and even in this mode there is some overshoot on the transitions. This shouldn't bother most people but if you see artifacts you can set it to 'Off' instead.

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
Acer Predator X27 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

Unlike most G-Sync monitors this monitor does not have ULMB, which is NVIDIA's BFI implementation. Acer's early marketing materials for this monitor listed ULMB support, but the monitor's OSD has no option for it and no other way to enable it was found. Other reviewers have confirmed the absence of ULMB.

The Acer X27 uses DC dimming and there is no flicker. Since each image is displayed for the full frame, motion is smoother but there is more persistence blur.

9.0 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
:
120 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
:
144 Hz
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.
:
G-Sync
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
:
120 Hz
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
:
< 20 Hz
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
:
144 Hz
VRR Supported Connectors : DisplayPort

Over DisplayPort, 144 Hz is not supported for RGB @ 8 bit because 4k @ 144 Hz @ RGB @ 8 bit is beyond the bandwidth of DisplayPort 1.4 ; to send 144 Hz the bandwidth must be reduced, such as by sending RGB @ 6 bit or 4:2:2 @ 8 bit.

Over DisplayPort, the only supported resolutions are 3840x2160, 1024x768, 800x600 and 640x480, and only 3840x2160 can run at refresh rates beyond 60 Hz. When a graphics card sends a different resolution to the monitor, say 1080p, the graphics card upscales 1080p to 4k and sends 4k. This unfortunately means that if your graphics card doesn't support the high bandwidth of DisplayPort 1.4 or 1.3, you cannot run this monitor at 120 Hz @ RGB (without resorting to more extreme methods), because when you attempt to send 1080p @ 120 Hz @ RGB the graphics card will instead try to send 4k @ 120 Hz @ RGB, which is beyond the bandwidth of DisplayPort 1.2 and under. We even made an NVIDIA Control Panel custom resolution at 1080p @ 60 Hz, and the monitor would not display it at all. Also when we set our GTX 960 to 4k @ 4:2:2, the maximum resolution was 98 Hz, though 4k @ 120 Hz @ 4:2:2 should be within the bandwidth of DisplayPort 1.2 .

8.7

Inputs

Score components:

The Acer Predator X27 has great low input lag, but it is higher than most other gaming monitors like the XB271HU. It has a large 27" screen with a 4k resolution that is perfect for almost any use.

8.4 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
:
12.3 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
:
20.4 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
:
13.5 ms
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

The monitor accepts a few non-native resolutions (only 1024x768, 800x600 and 640x480), but none can run at 120 Hz; this isn't usually a problem though because most video cards upscale to the monitor's native resolution without you even knowing.

At the native resolution and refresh rate input lag is low but may be disappointing to some gamers. With G-Sync enabled, it is lower but still higher than many other comparable monitors, like the ASUS ROG Swift PG279Q.

The HDR input lag test is not working correctly with the X27. We expect it to be ~13ms, in line with the Native Resolution and Variable Refresh Rate input lag. We will update the review with these results shortly.

9.1 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 : 4K UHD, 3840 x 2160
Aspect Ratio : 16:9
Megapixels : 8.3 MP
Pixel Density : 164 PPI
Screen Diagonal : 26.9 inches
Screen Area : 310 sq inches

The Acer X27 has a large 27" screen and a native 4k resolution. Even if you are sitting extremely close to the monitor you will still be able to see very fine details without seeing the individual pixels.

Inputs
Total Inputs
DisplayPort : 1 (DP 1.4)
Mini DisplayPort : No
HDMI : 1 (HDMI 2.0)
DVI : No
VGA : No
DisplayPort Out : No
USB : 4 (USB 3.0)
USB C : No
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : No
Digital Optical Audio Out : No
Analog Audio Out RCA : No

One of the USB inputs supports fast charging.

Features

The Acer Predator X27 has a nice set of additional features that should please most people. There are many display options that can adjust the picture, including a night-time blue filter mode. The on-screen display is well laid out and easy to navigate, as are the controls.

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 : Yes

One of the USB ports on the side of the monitor supports quick charging. There is a Blue Light feature that adds a yellow tint to the screen for nighttime viewing. There is also a Dark Boost feature that adjusts the black levels to make dark details easier to see.

There is an Aim Point feature that has multiple crosshair overlay options, as shown here and here

When in full screen G-Sync mode, there is an option to display the current refresh rate on the screen.

There is an ambient light feature that shines light from the backlight onto the surface beneath the monitor. It can also change colors dynamically depending on the average color of the screen.

The ambient light feature doesn't shine light from the backlight, it uses separate LEDs. There's LEDs that shine behind the monitor, and others that shine under the monitor. Also the fact that you can choose among a few colors (red, green, blue, orange etc.) is a more important feature than the adaptive color.

On-Screen Display (OSD)
Controls
Acer Predator X27 Controls picture

The controls are located behind the monitor on the right side. The menus are very easy to navigate thanks to the joystick control, very similar to LG monitors.

When the blinders are installed, the controls can be difficult to reach.

In The Box
Acer Predator X27 In The Box picture

  • Manual
  • HDMI cable
  • DisplayPort cable
  • USB cable
  • Vesa mount adapter
  • Top blinder (as shown here)

Differences between Sizes and Variants

We've tested the 27" Acer Predator X27, version bmiphzx.

If someone comes across a different type of panel or if their Predator X27 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.

Model Size Panel Type Curved Resolution Native Refresh
X27 27" IPS No 4k 120Hz
X34 34" IPS Yes 3440x1440 120Hz
XB271HU 27" IPS No 1440p 144Hz

The X27 we reviewed was manufactured in May 2018.

Compared to other Monitors

Acer Predator X27 Group Shot Picture
Left: Samsung CHG70. Middle: Acer Predator X27 Right: LG 27UK650
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The Acer Predator is a very good HDR gaming monitor, and one of the best 4k monitors for HDR we've tested, but it comes at a very premium price. See our recommendations for the best monitors and the best PC gaming monitors.

ASUS ROG PG279Q

The Acer Predator X27 and ASUS ROG Swift PG279Q offer very similar performance overall. The Acer X27 has a higher native resolution, at 4k, that allows you to see more details or multitask easier. The X27 supports HDR and has a wider color gamut. The ROG Swift PG279Q has better motion handling, including an optional black frame insertion feature, and has less input lag for gaming.

Acer Predator XB271HU

The Acer Predator X27 is better than the Acer Predator XB271HU. The X27 has a higher native resolution, so you can see more details, and it supports HDR. It displays a wider color gamut, great for professional users in print and marketing. The XB271HU has lower native input lag, great for gamers, and has an optional black frame insertion feature that can clear up motion.

Samsung CHG70

The Acer Predator X27 is a bit better than the Samsung CHG70, unless dark room performance is an important factor. The Predator X27 is much brighter than the CHG70 and has wider viewing angles. The X27 offers a better HDR experience, highlights stand out more in some scenes and colors are more saturated and vibrant. The VA panel in the CHG70 delivers deeper blacks, and better black uniformity, but worse viewing angles. The CHG70 also has better low input lag.

Dell U2718Q

The Acer Predator X27 is slightly better than the Dell U2718Q. The X27 is brighter and offers a much better HDR experience, as it is brighter and can produce brighter highlights, as well as the added full array local dimming feature. The X27 has a much wider color gamut, suitable for professional use for print and marketing. The Dell U2718Q has more ergonomic options and is easier to adjust to an optimal viewing position.

Conclusion
SEE PRICE
Amazon.com

8.0Mixed Usage
Score components:
Very good monitor for mixed usage. It is well suited for a brighter office setting, but has limited ergonomic options. It has some excellent gaming features like support for NVIDIA's G-Sync technology, but is limited by the relatively high input lag.
Very good monitor for office use. The high resolution 4k screen produces sharp text and makes it easier to multitask. It has wide viewing angles and decent reflection handling, although it isn't as bright in SDR. Unfortunately, it has limited ergonomic options and might be more difficult to place in an ideal position.
Great monitor for gaming. It has some excellent gaming features, including support for NVIDIA's G-Sync technology. Input lag is good, but high compared to similar gaming monitors like the Predator XB271HU. It is not well suited for late night gaming in a dark room due to the poor contrast ratio and bad black uniformity.
Very good monitor for watching movies or streaming internet video. The large screen and 4k resolution produce very detailed, crisp images that allow you to see every detail. The wide color gamut and good color volume make sure you see every detail in your videos. Small highlights are very bright in HDR, and the local dimming feature enhances the experience, but there is some haloing around bright highlights in dark scenes.
Impressive monitor for media creation, especially for print and media creation thanks to the nearly complete coverage of the wider Adobe s.RGB color space. The high resolution screen makes it easier to see every detail and get more done.
Decent monitor for HDR gaming, slightly better than the Samsung CHG70. Dark room performance is hindered by the poor contrast ratio and bad black uniformity. The Acer X27 is extremely bright in HDR and small highlights really stand out.

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