Acer Predator X27 Monitor Review

Updated Aug 16, 2018 at 09:00 am
Acer Predator X27 Picture
Usage Ratings - Version 1.0
Mixed Usage
Media Creation
HDR Gaming
Size 27"
Resolution 3840x2160
Refresh Rate 120 Hz
LCD Type
Variable Refresh Rate

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.

Our Verdict

8.0 Mixed Usage

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.

See our Mixed Usage recommendations
7.9 Office

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.

See our Office recommendations
8.1 Gaming

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.

See our Gaming recommendations
8.0 Multimedia

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.

See our Multimedia recommendations
8.0 Media Creation

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.

See our Media Creation recommendations
7.4 HDR Gaming

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.

See our HDR Gaming recommendations
  • 8.0 Mixed Usage
  • 7.9 Office
  • 8.1 Gaming
  • 8.0 Multimedia
  • 8.0 Media Creation
  • 7.4 HDR Gaming
  • Excellent wide color gamut
  • Excellent HDR brightness
  • Image remains accurate at an angle
  • Performs poorly in a dark room

Check Price

27" Predator X27

Test Results

Curved No
Curve radius N/A
Weight (without stand)
14.3 lbs (6.5 kg)
Weight (with stand)
17.4 lbs (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.

18.7" (47.5 cm)
11.3" (28.7 cm)

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

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.

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.

0.6" (1.5 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 (with stand)
10.0" (25.4 cm)
Thickness (without stand)
3.1" (7.9 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.

Build Quality

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.

Picture Quality
Picture Quality
Native Contrast
815 : 1
Contrast with local dimming
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.

Picture Quality
Local Dimming
Local Dimming

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.

Picture Quality
SDR Peak Brightness
SDR Real Scene
299 cd/m²
SDR Peak 2% Window
306 cd/m²
SDR Peak 10% Window
301 cd/m²
SDR Peak 25% Window
300 cd/m²
SDR Peak 50% Window
300 cd/m²
SDR Peak 100% Window
301 cd/m²
SDR Sustained 2% Window
305 cd/m²
SDR Sustained 10% Window
301 cd/m²
SDR Sustained 25% Window
299 cd/m²
SDR Sustained 50% Window
299 cd/m²
SDR Sustained 100% Window
301 cd/m²

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.

Picture Quality
HDR Peak Brightness
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

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.

Picture Quality
Horizontal Viewing Angle
Color Shift from Left
35 °
Color Shift from Right
35 °
Brightness from Left
46 °
Brightness from Right
45 °
Black Level from Left
75 °
Black Level from Right
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.

Picture Quality
Vertical Viewing Angle
Color Shift from Below
30 °
Color Shift from Above
31 °
Brightness from Below
36 °
Brightness from Above
37 °
Black Level from Below
75 °
Black Level from Above
75 °

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

Picture Quality
Gray Uniformity
50% Std. Dev.
2.887 %
50% DSE
0.102 %
5% Std. Dev.
0.413 %
5% DSE
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.

Picture Quality
Black Uniformity
Native Std. Dev.
3.046 %
Std. Dev. w/ L.D.
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.

Picture Quality
Pre Calibration
Picture Mode
276 cd/m²
Luminance Settings
Contrast Setting
RGB controls
Color Temperature
6042 K
White Balance dE
Color dE

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.

Picture Quality
Post Calibration
Picture Mode
100 cd/m²
Luminance Settings
Contrast Setting
RGB Controls
Color Temperature
6497 K
White Balance dE
Color dE

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.

Picture Quality
SDR Color Gamut
sRGB xy
95.5 %
Adobe RGB xy
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).

Picture Quality
SDR Color Volume
sRGB in ICtCp
97.4 %
Adobe RGB in ICtCp
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.

Picture Quality
HDR Color Gamut
Wide Color Gamut
DCI P3 xy
85.8 %
Rec. 2020 xy
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.

Picture Quality
HDR Color Volume
DCI-P3 in ICtCp
80.8 %
Rec. 2020 in ICtCp
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.

Picture Quality
Image Retention
IR after 0 min recovery
0.00 %
IR after 2 min recovery
0.00 %
IR after 4 min recovery
0.00 %
IR after 6 min recovery
0.00 %
IR after 8 min recovery
0.00 %
IR after 10 min recovery
0.00 %

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

Picture Quality
Color Depth
10 Bit

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

Picture Quality
Color Bleed
Pixel row error
0.000 %
Pixel column error
0.001 %

There is no color bleed on the Acer Predator X27.

Picture Quality

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.

Motion Blur
80% Response Time
3.4 ms
100% Response Time
10.1 ms
Best Overdrive Setting

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.

Image Flicker
Flicker-free Yes
PWM Dimming Frequency
0 Hz
Black Frame Insertion (BFI)
BFI Maximum Frequency
BFI Minimum Frequency

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.

Refresh Rate
120 Hz
Factory Overclock
144 Hz
Variable Refresh Rate
G-SYNC Compatible
Yes (Native)
VRR Maximum
120 Hz
VRR Minimum
< 20 Hz
VRR Maximum With OC
144 Hz
VRR Supported Connectors DisplayPort

Update 01/06/2020: Acer has released an updated version of the X27, which can be identified by the version number 'Pbmiphzx'. As far as we know, this model is identical to the one we've tested, but supports Adaptive Sync over HDMI as well.

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 .

Input Lag
Native Resolution
12.3 ms
Non-Native Res @ Native Refresh
Native Resolution @ 60 Hz
20.4 ms
Variable Refresh Rate
13.5 ms
10 bit HDR
12.7 ms
Black Frame Insertion (BFI)

Update 11/26/2019: We retested the input lag, and were now able to test the HDR input lag properly. The other results didn't change.

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.

Resolution and Size
Native Resolution 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.

Total Inputs
DisplayPort 1 (DP 1.4)
Mini DisplayPort No
HDMI 1 (HDMI 2.0)
DisplayPort Out No
USB 4 (USB 3.0)
Analog Audio Out 3.5mm 1
Microphone In 3.5mm No
Digital Optical Audio Out No
Analog Audio Out RCA No
Power Supply External Brick

One of the USB inputs supports fast charging.

Additional Features
HDR10 Yes
Multiple input display

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)

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

  • 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 Version Size Panel Type Curved Resolution Native Refresh Notes
X27 bmiphzx 27" IPS No 4k 120Hz G-SYNC only
X27 Pbmiphzx 27" IPS No 4k 120Hz G-SYNC + Adaptive Sync
X34 bmiphz 34" IPS Yes 3440x1440 120Hz G-SYNC
XB271HU bmiprz 27" IPS No 1440p 144Hz G-SYNC

Update 01/06/2020: Acer has released an updated version of the X27, which can be identified by the version number 'Pbmiphzx'. As far as we know, this model is identical to the one we've tested, but supports Adaptive Sync over HDMI as well.

The X27 we reviewed was manufactured in May 2018.

Compared to other monitors

Comparison 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 gaming monitors.

Acer Predator XB273K

The Acer Predator X27 is a bit better than the Acer Predator XB273K. The X27 has wider viewing angles and a local dimming feature that helps dark room performance. The X27 has also wider coverage of the Adobe RGB space, which is important for those in the media and publishing business. The XB273K has a lower input lag, which is great for gamers. 


The Acer Predator X27 and ASUS ROG 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 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.

LG 27UK650-W

The Acer Predator X27 is slightly better than the LG 27UK650. The Acer Predator X27 supports local dimming and has better HDR performance, thanks to its wider color gamut and higher HDR peak brightness. The LG 27UK650-W has slightly lower input lag and feels more responsive, which is great for gaming.

Gigabyte Aorus AD27QD

The Gigabyte Aorus AD27QD and the Acer Predator X27 both have very similar performance. The Gigabyte has a lower input lag, which is great for gaming, and better ergonomics to help you position it to your liking with ease. The Acer Predator X27, on the other hand, has better resolution and allows you to see more of your work on the screen. The X27 also supports local dimming and delivers better HDR performance.

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's 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.

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.

Philips Momentum 436M6VBPAB

Although they use different panel technologies, the Acer Predator X27 is significantly better than the Philips 436M6VBPAB for most uses. The X27 uses an IPS panel, and the image remains accurate when viewed at an angle. The X27 also has a faster refresh rate, great for gaming, and has a more versatile stand with better ergonomics. The Acer X27 also has a much better local dimming feature with hundreds of local dimming zones, compared to a few dozen on the Philips. The Philips 436M6VBPAB has a VA panel, and looks much better in a dark room thanks to the much better contrast ratio.

+ Show more



Be part of the most informed community and take advantage of our advanced tools to find the best product for your needs.
Join our mailing list:
Become an insider

Unlimited access to full product reviews, test measurements and scores

test table UI

Product prices across the site on reviews, tables and tools

product prices UI

Additional votes for our
next reviews

Additional votes UI

Early Access
to our reviews and test measurements

Early Access UI

Create Discussion