Acer Predator XB273K Monitor Review

Tested using Methodology v1.0
Updated Aug 16, 2019 at 08:22 am
Acer Predator XB273K Picture
Mixed Usage
Media Creation
HDR Gaming
Size 27"
Resolution 3840x2160
Refresh Rate 120 Hz
LCD Type
Variable Refresh Rate

The Acer Predator XB273K is a good monitor with decent picture quality that has great gaming performance. It has an excellent 4k resolution screen that displays every little detail of your game, a very low input lag, supports G-SYNC, and has a very fast response time that delivers crisp motion. It can display a wide color gamut and can get fairly bright in SDR, which is good for a bright room. HDR brightness is decent for playing games, but not so good for watching HDR movies. Unfortunately, the monitor has an IPS panel; this hurts dark room performance as blacks look like gray. Furthermore, the viewing angles on our unit weren't as good as on other IPS monitors, although still better than most VA panel monitors.

Our Verdict

7.8 Mixed Usage

The Predator XB273K is a good monitor for mixed usage. It has a 4k resolution that displays great detail, favoring multitasking. The input lag is very low and the monitor feels very responsive and supports G-SYNC to please gamers. Unfortunately, the contrast ratio is low and dark room performance is hurt. It can get fairly bright in SDR and its HDR brightness is decent, but can't make bright highlights show off in HDR movies.

  • Very low input lag, great for gaming.
  • Excellent 4k resolution.
  • Low contrast ratio and bad black uniformity.
7.7 Office

This is a good monitor for office use. The 4k resolution and 27" screen allow you to easily multitask. The viewing angles are not as great as other IPS monitors but nonetheless, you can share your work with your colleagues without issue. It has good gray uniformity, which is great for web browsing and decent ergonomics and won't trouble you to place it comfortably.

8.3 Gaming

This is a great monitor for playing games. It has a very low input lag and is very responsive, great for even competitive gamers. It supports G-SYNC for nearly tear-free gaming, but unfortunately, the input lag is higher at 60Hz and this might disappoint those with consoles. The response time is very fast and motion looks crisp without much motion blur behind fast-moving content, and the 4k resolution can display more details of your gaming arena.

7.8 Multimedia

This is a good monitor for consuming multimedia. It has an impressive 4k resolution that can display 4k movies at their native format, but unfortunately, the low contrast doesn't favor dark room viewing. The viewing angles are good for watching from the side although other IPS monitors perform better. It has a low input lag, decent reflection handling, and can get fairly bright for a bright room, which is where the monitor performs best.

7.8 Media Creation

The Predator XB273K is a good monitor for media creation. It has a good size screen with excellent resolution, so you can put more of your work on it. It has decent ergonomics and, although the viewing angles are not as good as other IPS monitors, you can still share your screen with clients or colleagues.

6.9 HDR Gaming

The XB273K is a decent monitor for HDR gaming. It's limited by the low contrast and bad black uniformity, but it gets decently bright in HDR. It supports G-SYNC for nearly tear-free gaming and has a very low input lag that makes it very responsive. Finally, the 4k resolution will display more of your game on your screen.

  • 7.8 Mixed Usage
  • 7.7 Office
  • 8.3 Gaming
  • 7.8 Multimedia
  • 7.8 Media Creation
  • 6.9 HDR Gaming

Check Price

27" Predator XB273K

Test Results

Curved No
Curve radius N/A
Weight (without stand)
12.8 lbs (5.8 kg)
Weight (with stand)
16.3 lbs (7.4 kg)

The Acer Predator XB3 has a great design and closely resembles the Acer Predator X27. The stand is wide with thin legs and supports the monitor well. Alternatively, you can VESA mount it using the provided adapter. The ergonomics of the stand are decent and allow you to place it in a comfortable position with ease. The back of the monitor is made of plastic. Finally, the monitor also has some nice LED bias lighting to create a nice ambiance. Just like the X27, this monitor has blinder screens to minimize glare, and the overall build quality is great.

21.1" (53.6 cm)
12.2" (31.0 cm)

The stand of the Acer Predator XB273K is wide and supports the monitor well. The legs are thin and give you space to put small things in front of the monitor.

Height Adjustment
5.4" (13.7 cm)
Switch portrait/landscape No
Swivel Range -20° to 20°
Tilt Range -22.5° to 5°

The ergonomics of the Predator XB3 are mediocre. It has good height adjustment and excellent tilt range, and with a little effort you'll be able to place it in a comfortable position.

Wall Mount VESA 100x100

The back is plain and made of plastic. The hole at the bottom of the stand pole serves for cable management and there is a plastic cover to hide the inputs. Also, near the top of the stand pole, there is a small plastic clip that opens when you click it, so it can hold your headphones.

There's also a fan, similar to the Acer Predator X27, on the back of the monitor that helps with heat dissipation. It's always running, but is extremely quiet.

0.6" (1.5 cm)

The borders on the Acer XB273K have an average thickness and there is no gap between the borders and the screen. The borders were measured without the blinder screens.

Thickness (with stand)
7.5" (19.1 cm)
Thickness (without stand)
3.2" (8.1 cm)

When the monitor is placed on its stand, it's quite thick and can't be placed close to a wall. If you VESA mount it, it won't protrude much. The height adjustment is on an angle, so the actual thickness varies depending on the height. The reported measurement is from the top. If measured from the bottom, the thickness is 7.7 inches.

Build Quality

The build quality of the Predator XB3 is good. There are no gaps or loose ends and the monitor feels very sturdy.

Picture Quality
Picture Quality
Native Contrast
1005 : 1
Contrast with local dimming

The native contrast ratio on the Predator XB3 is mediocre. Blacks look like gray in a dark room and the performance is in the lower range of IPS monitors similar to the LG 27UD58-B.

Picture Quality
Local Dimming
Local Dimming

This monitor doesn't have a local dimming feature. The above video is provided for reference only.

Picture Quality
SDR Peak Brightness
SDR Real Scene
292 cd/m²
SDR Peak 2% Window
326 cd/m²
SDR Peak 10% Window
326 cd/m²
SDR Peak 25% Window
326 cd/m²
SDR Peak 50% Window
326 cd/m²
SDR Peak 100% Window
326 cd/m²
SDR Sustained 2% Window
326 cd/m²
SDR Sustained 10% Window
326 cd/m²
SDR Sustained 25% Window
326 cd/m²
SDR Sustained 50% Window
326 cd/m²
SDR Sustained 100% Window
326 cd/m²

The Acer Predator XB273K has good SDR peak brightness and you should have no issues placing it in a relatively bright room. You won't notice any variation in peak brightness with different content.

Picture Quality
HDR Peak Brightness
HDR Real Scene
381 cd/m²
HDR Peak 2% Window
422 cd/m²
HDR Peak 10% Window
422 cd/m²
HDR Peak 25% Window
422 cd/m²
HDR Peak 50% Window
422 cd/m²
HDR Peak 100% Window
422 cd/m²
HDR Sustained 2% Window
421 cd/m²
HDR Sustained 10% Window
422 cd/m²
HDR Sustained 25% Window
422 cd/m²
HDR Sustained 50% Window
422 cd/m²
HDR Sustained 100% Window
422 cd/m²

The HDR peak brightness for the Acer Predator XB273K is decent. It gets decently bright, but the monitor can't deliver bright highlights the way they are meant to be.

Picture Quality
Horizontal Viewing Angle
Color Shift from Left
25 °
Color Shift from Right
27 °
Brightness from Left
31 °
Brightness from Right
35 °
Black Level from Left
75 °
Black Level from Right
47 °
Curve Radius N/A

The horizontal viewing angles of the Predator XB273K are disappointing, which is surprising for an IPS monitor. In fact, it's the worst performance from the ones we've measured so far. Colors shift and brightness drops faster than other IPS monitors. But what hurts performance the most is that the black levels don't stay relatively constant throughout our test as they do in all other IPS monitors we've tested so far. Instead, black levels rise higher than our threshold when you look at the monitor from the right.

In normal use you shouldn't experience this, as it's rare that you look at a monitor at 45 degrees.

Picture Quality
Vertical Viewing Angle
Color Shift from Below
31 °
Color Shift from Above
20 °
Brightness from Below
33 °
Brightness from Above
25 °
Black Level from Below
75 °
Black Level from Above
75 °

The vertical viewing angles are good, as expected from an IPS monitor. Black levels stay low and the image doesn't wash out. Unfortunately, when looking from above, you might experience some decrease in brightness and loss of color accuracy at relatively small angles. This doesn't happen when you look at the screen from below.

Picture Quality
Gray Uniformity
50% Std. Dev.
4.169 %
50% DSE
0.098 %
5% Std. Dev.
0.348 %
5% DSE
0.049 %

The gray uniformity of the Acer XB273K is excellent. There is some vignetting that you can spot at the corners, but the center of the screen is uniform so you shouldn't expect any dirty screen effect while browsing the web. In darker scenes, the uniformity is even better.

Picture Quality
Black Uniformity
Native Std. Dev.
3.300 %
Std. Dev. w/ L.D.

The black uniformity of the Acer Predator XB273K is bad. There is noticeable backlight bleed in the top left corner and generally along the edges. This is not unusual for IPS monitors, and it's only noticeable in dark scenes in a very dark room.

Picture Quality
Pre Calibration
Picture Mode
231 cd/m²
Luminance Settings
Contrast Setting
RGB controls
Color Temperature
5976 K
White Balance dE
Color dE

The out-of-the-box accuracy of this monitor is good. Although some inaccuracies are obvious in the grays and the color temperature is a little warm, color inaccuracies can hardly be spotted by the untrained eye. Gamma follows the target closely, but most bright scenes are brighter than they should be.

Picture Quality
Post Calibration
Picture Mode
100 cd/m²
Luminance Settings
Contrast Setting
RGB Controls
Color Temperature
6453 K
White Balance dE
Color dE

This monitor has remarkable accuracy after calibration. Any remaining inaccuracies are so small than only with the aid of a colorimeter you can detect them. Gamma follows the target curve very closely and the color temperature is very close to the 6500K target.

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

Picture Quality
SDR Color Gamut
sRGB xy
100.0 %
Adobe RGB xy
82.0 %

sRGB Picture Mode: User (calibrated)
Adobe RGB Picture Mode: User

Excellent SDR color gamut, very similar to the Dell U3219Q. It can display the entire sRGB color space, which is great, and it has very good coverage of the Adobe RBG color space, which is great for professional photo editing. If you're looking for even better coverage of the Adobe RGB space, check out the Acer Predator X27.

Picture Quality
SDR Color Volume
sRGB in ICtCp
98.6 %
Adobe RGB in ICtCp
90.5 %

sRGB Picture Mode: User
Adobe RGB Picture Mode: User

Excellent SDR color volume. The monitor can display most colors in its gamut at almost all brightness levels. Unfortunately, the low contrast doesn't allow it to display dark saturated colors very well.

Picture Quality
HDR Color Gamut
Wide Color Gamut
DCI P3 xy
85.2 %
Rec. 2020 xy
67.7 %

DCI P3 Picture Mode: User
Rec. 2020 Picture Mode: User

Good HDR color gamut. The Acer XB273K can display a wide color gamut and although the coverage of the DCI-P3 color space is similar to the Acer Predator X27, in the wider Rec. 2020, the coverage is narrower.

Picture Quality
HDR Color Volume
DCI-P3 in ICtCp
83.1 %
Rec. 2020 in ICtCp
68.0 %

DCI P3 Picture Mode:User
Rec. 2020 Picture Mode: User

Good HDR color volume, slightly better than the X27 in DCI P3. In Rec. 2020 the color volume isn't as good as the X27, and the XB273K is limited by its color gamut and its low native contrast ratio, so it can't produce colors as bright as pure white or display dark, saturated colors very well.

Picture Quality
Image Retention
IR after 0 min recovery
0.00 %
IR after 2 min recovery
0.03 %
IR after 4 min recovery
0.00 %
IR after 6 min recovery
0.01 %
IR after 8 min recovery
0.00 %
IR after 10 min recovery
0.00 %

The Acer Predator XB273K doesn't have any signs of image retention. Our test depicts some faint image retention after 2 minutes of rest time and again after 6 minutes of rest time. As you can see in the following images, this isn't image retention, but rather noise detected from our test. Also, our scoring isn't correct since it penalizes for the noise it detected. In the next test bench update, we'll update this test.

Reference image
IR after 0 min recovery
IR after 2 min recovery
IR after 4 min recovery
IR after 6 min recovery
IR after 8 min recovery
IR after 10 min recovery

Picture Quality
Color Depth
8 Bit

Excellent gradient handling, with inevitable signs of 8-bit banding.

Picture Quality
Color Bleed
Pixel row error
0.000 %
Pixel column error
0.002 %

There is some extremely minor vertical color bleed, but this isn't at all noticeable with regular content.

Picture Quality

The Predator XB273K has decent reflection handling, just like the Acer VG271UP and the Gigabyte Aorus AD27QD. It's recommended, however, to avoid direct light and the included blinders can help to reduce glare from side sources.

Motion Blur
80% Response Time
3.5 ms
100% Response Time
12.1 ms
Best Overdrive Setting

Mode Response Time Chart Motion Blur Photo
Response Time Off Chart Photo
Response Time Normal Chart Photo
Response Time Extreme Chart Photo

The response time of the Acer Predator XB273K is extremely fast and motion is crisp with only a little blur trail behind fast-moving content. The level of overdrive can be changed between three settings: 'Off', 'Normal', and 'Extreme'. We recommend the 'Normal' setting, as the 'Extreme' setting has severe overshoot in some transitions, especially in dark scenes. You can see the charts and the motion photos for the three levels at the table above.

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

This monitor has a completely flicker-free backlight at all levels, so it's a good choice for those who are bothered by flicker. Unfortunately, there isn't an optional Black Frame Insertion feature to help make motion look crisper.

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, HDMI

The Acer Predator XB273K has an excellent refresh rate and supports G-SYNC for a nearly tear-free gaming experience. The VRR range is excellent provided you use the DisplayPort. If you use the HDMI port, the 4k VRR maximum is 60Hz due to bandwidth limitations, and the HDMI VRR range at 1080p is 24Hz to 98Hz.

Input Lag
Native Resolution
5.3 ms
Non-Native Res @ Native Refresh
Native Resolution @ 60 Hz
21.4 ms
Variable Refresh Rate
5.3 ms
10 bit HDR
11.4 ms
Black Frame Insertion (BFI)

The Predator XB273K has remarkably low input lag. This is great news for competitive gamers when every millisecond counts. Unfortunately, the input lag at 60Hz is slightly high, which isn't good news for those who intend to use it with consoles.

We performed our HDR test at 98Hz, as it was the highest possible refresh rate the monitor could do on DisplayPort 1.4 on HDR 10-bit.

Resolution and Size
Native Resolution 3840 x 2160
Aspect Ratio 16:9
Megapixels 8.3 MP
Pixel Density 164 PPI
Screen Diagonal 27.0 inches
Screen Area 310 sq inches

The Predator XB273 is a 27" 4k monitor that offers you great screen real estate and excellent detail for your games or your work. It's a good option for multitasking.

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

You can control the volume of the Analog Audio Out through the OSD, if you wish.

Additional Features
HDR10 Yes
Multiple input display

The Acer Predator XB273 has speakers and supports HDR 10, but other than that, it has limited extra features.

  • It has some nice LED bias lighting as you can see here. You can choose among red, blue, orange, and off and there are two zones, one at the bottom of the screen and one at the top. You can also choose a 'breathing' or fixed type of LED flash.
  • You can display a crosshair in any game to help your aim
  • It supports OSD lock.
  • You can reassign the hotkeys found on the back next to the joystick.

On-Screen Display (OSD)

The controls are located behind the monitor on the right side. There is a joystick control that makes it easy to navigate the menus. When the blinders are installed, the controls are hard to reach.

In The Box

  • Manual
  • Displayport Cable
  • USB-B type Cable
  • Power Cable
  • Power Adapter
  • VESA Adapter

Differences Between Sizes and Variants

We tested the Acer Predator XB273K, which is a 4k IPS gaming monitor. There are many other variants of the Predator lineup, which all support G-SYNC but with different sizes, panel types, resolutions, and refresh rates, a selection of which are listed in the table below.

If someone comes across a different type of panel or if their monitor 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 Resolution Native Refresh
XB273K 27" IPS 4k 120Hz
XB271HU bmiprz 27" IPS 1440p 144Hz
XB271HU Abmiprz 27" TN 1440p 144Hz
X27 27" IPS 4k 240Hz
Z35P 35" VA 3440x1440 100Hz

The Acer Predator XB273K we reviewed was manufactured in January 2019.

Compared to other monitors

Comparison picture

Left: Dell U2718Q. Middle: Acer Predator XB273K. Right: Acer Predator X27.
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The Acer Predator XB273K is a great gaming monitor, but there are better options available. See our recommendations for the best monitors, the best 27 inch gaming monitors, and the best budget monitors.

Acer Predator X27

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. 

Acer Predator XB271HU

The Acer Predator XB273K is slightly better than the Acer Predator XB271HU. The XB273K has a higher resolution to display more details on your screen and supports HDR, great for HDR gaming. The XB271HU has a higher refresh rate, a BFI feature that helps improve the appearance of motion, and better ergonomics to help position it comfortably.


The ASUS ROG Swift PG279Q is a bit better than the Acer Predator XB273K. The ASUS ROG Swift PG279Q has better ergonomic adjustments so you can place it comfortably on your desk. Its viewing angles are slightly wider than the Acer's, which is good if you often share your screen. Finally, it has an optional black frame insertion feature to help make motion crisper. The Acer Predator XB273K, on the other hand, has full 4k resolution and supports HDR so you can enjoy the newest HDR games.

Acer Nitro XV273X

The Acer Nitro XV273X is better than the Acer Predator XB273K. Though they both have an IPS panel, the Nitro XV273X has a better contrast ratio and significantly better black uniformity, as well as better viewing angles. However, the XB273K has a 4k resolution, which is great for multitasking. The XB273K supports a wide color gamut, but it can't get as bright as the Nitro XV273X.

BenQ EL2870U

The Acer Predator XB273K and the BenQ EL2870U have different panels, each with advantages and disadvantages. In this case, however, the XB273K is much better in most aspects. The XB273 has a faster native refresh rate, better viewing angles, a faster response time that delivers crisper motion, and you can position it to your liking with ease. The BenQ is slightly larger.

Gigabyte Aorus AD27QD

The Gigabyte Aorus AD27QD is a bit better than the Acer Predator XB273K. The Aorus has a higher refresh rate, better ergonomics so you can place it to a comfortable position with ease, supports FreeSync, and has a BFI feature to help improve the appearance of motion. The Acer, on the other hand, has a better resolution and can display more details of your game on the screen. It also natively supports G-SYNC.

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