Acer Predator XB271HU Monitor Review

Tested using Methodology v1.1
Updated Apr 01, 2020 at 08:46 am
Acer Predator XB271HU Picture
7.6
Mixed Usage
7.9
Office
8.1
Gaming
7.3
Multimedia
7.4
Media Creation
5.6
HDR Gaming
Size 27"
Resolution 2560x1440
Max Refresh Rate
165 Hz
LCD Type
IPS
Variable Refresh Rate
G-SYNC

The Acer Predator XB271HU is a good 1440p monitor with a fast refresh rate, wide viewing angles, and outstanding low input lag. The stand has impressive ergonomics, so it's easy to place it in an ideal viewing position or turn the screen to share it with someone else. Although it's a great gaming monitor overall, the response time is a bit slower than most similar monitors. Unfortunately, it has a low contrast ratio, so blacks appear gray in a dark room, but this is typical for IPS monitors.

Our Verdict

7.6 Mixed Usage

The Acer Predator XB271HU is a good monitor for most uses. It's a very good office monitor thanks to the exceptional ergonomics and good peak brightness, and it has excellent low input lag, making it a great gaming monitor as well. It's a decent monitor for multimedia and media creation, but it has a low native contrast ratio, so it's not a great choice for a dark room.

Pros
  • Image remains accurate at an angle.
  • Outstanding ergonomics.
  • Outstanding low input lag.
Cons
  • Low contrast ratio.
  • Slower response time than similar models.
7.9 Office

Very good monitor for office use. The Acer Predator XB271HU features an excellent stand with complete articulation making it easy to find a comfortable position. It offers a good amount of screen real-estate for productivity, and its wide viewing angle and rotating feature makes it powerful in a more communal working environment.

8.1 Gaming

This is a great gaming monitor. The Acer Predator XB271HU's 144Hz refresh rate, G-SYNC support, and excellent low input lag provide a great gaming experience. Unfortunately, it delivers only average picture quality, which is mostly an issue for darker viewing environments due to the low contrast ratio and poor black uniformity.

7.3 Multimedia

The Acer Predator XB271HU is a decent monitor for consuming media. It has a great horizontal viewing angle, so multiple people can share the screen without sacrificing picture quality. It has excellent uniformity, but its low contrast and lack of HDR-related features mean its picture quality is only about average in a dark room.

7.4 Media Creation

The Acer Predator XB271HU is a decent monitor for creating media. It has excellent gray uniformity, and when calibrated, it tracks the sRGB target almost perfectly. Unfortunately, though, it does not cover wide gamuts like Adobe RGB and DCI-P3, making it a bit limited for producing print and HDR content.

  • 7.6 Mixed Usage
  • 7.9 Office
  • 8.1 Gaming
  • 7.3 Multimedia
  • 7.4 Media Creation
  • 5.6 HDR Gaming
  1. Update 2/21/2020: Converted to Test Bench 1.1.

Check Price

27" Predator XB271HU
SEE PRICE
Amazon.com

Test Results

Design
Design
Style
Curved No
Curve Radius Not Curved
Weight (without stand)
12.3 lbs (5.6 kg)
Weight (with stand)
17.6 lbs (8.0 kg)

The Acer Predator XB271HU has a simple design overall, with thin bezels on three sides, a solid stand with excellent ergonomics, and decent build quality.

Design
Stand
Width
17.6" (44.7 cm)
Depth
10.6" (26.9 cm)

The stand of the Acer XB271HU is quite small and looks good with some red accents. It supports the monitor well and feels stable, despite the small footprint.

9.1
Design
Ergonomics
Height Adjustment
5.9" (15.0 cm)
Switch Portrait/Landscape Yes, Both Ways
Swivel Range -30° to 30°
Tilt Range -22.5° to 5°

There's quite a good range of ergonomic adjustment options available, which makes it easy to find a comfortable setup. The screen also rotates to portrait orientation on either side, so you can choose which direction you want the inputs to face.

Design
Back
Wall Mount VESA 100x100

The rear of the monitor is quite basic but looks good. There's a hole in the back of the stand for cable management, and a quick-release button to remove the stand for easy transport.

Design
Borders
Borders
0.3" (0.8 cm)

The borders of the Acer XB271HU are quite thin on three sides, making it a great choice for a multi-monitor setup.

Design
Thickness
Thickness (with stand)
8.7" (22.1 cm)
Thickness (without stand)
2.4" (6.1 cm)

The monitor appears a bit thick when viewed from the side, as the area where the components and inputs are located is quite bulky. It can still sit quite close to a wall but does end up taking more desk space than some other designs such as the Dell S2716DG.

7.0
Design
Build Quality

The build quality of the Acer Predator is quite good. The parts are all plastic but do feel well-constructed.

Picture Quality
6.1
Picture Quality
Contrast
Native Contrast
1055 : 1
Contrast With Local Dimming
N/A

Like most IPS monitors, the Acer Predator XB271HU monitor has a mediocre native contrast ratio. This results in blacks that look gray, but it's mainly only noticeable in a dark room.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

The Acer Predator XB271HU doesn't have a local dimming feature. The video is for reference only.

7.5
Picture Quality
SDR Peak Brightness
SDR Real Scene
286 cd/m²
SDR Peak 2% Window
314 cd/m²
SDR Peak 10% Window
314 cd/m²
SDR Peak 25% Window
314 cd/m²
SDR Peak 50% Window
314 cd/m²
SDR Peak 100% Window
313 cd/m²
SDR Sustained 2% Window
314 cd/m²
SDR Sustained 10% Window
314 cd/m²
SDR Sustained 25% Window
314 cd/m²
SDR Sustained 50% Window
314 cd/m²
SDR Sustained 100% Window
313 cd/m²
SDR ABL
0.000

The Acer Predator XB271HU has good peak brightness, with no fluctuation in brightness with different content. It's bright enough that glare shouldn't be an issue in most rooms.

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

HDR isn't supported.

8.3
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
42 °
Color Washout From Right
46 °
Color Shift From Left
48 °
Color Shift From Right
54 °
Brightness Loss From Left
45 °
Brightness Loss From Right
48 °
Black Level Raise From Left
70 °
Black Level Raise From Right
70 °
Gamma Shift From Left
56 °
Gamma Shift From Right
58 °

Great horizontal viewing angle. This results in no visible deterioration when directly in front, and the screen remains usable to users sharing the screen on either side.

7.0
Picture Quality
Vertical Viewing Angle
Color Washout From Below
30 °
Color Washout From Above
31 °
Color Shift From Below
36 °
Color Shift From Above
41 °
Brightness Loss From Below
33 °
Brightness Loss From Above
35 °
Black Level Raise From Below
70 °
Black Level Raise From Above
70 °
Gamma Shift From Below
32 °
Gamma Shift From Above
34 °

Decent vertical viewing angle. Moving your head up and down causes no visible shift in the image, and the Acer Predator XB271 remains usable when standing above it or while sitting below the screen.

8.5
Picture Quality
Gray Uniformity
50% Std. Dev.
3.048 %
50% DSE
0.125 %
5% Std. Dev.
0.398 %
5% DSE
0.043 %

The Acer Predator XB271HU has excellent overall gray uniformity. There's very little dirty screen effect, but the sides of the screen are a bit darker than the center. In near-dark scenes, the uniformity is much better.

4.5
Picture Quality
Black Uniformity
Native Std. Dev.
3.005 %
Std. Dev. w/ L.D.
N/A

The monitor has poor black uniformity. Some clouding and flashlighting is visible near almost every edge of the display, which hurts the black uniformity considerably. This results in blotchy dark scenes, especially when viewed in a dark room.

3.6
Picture Quality
Pre Calibration
Picture Mode
User
Luminance
306 cd/m²
Luminance Settings
80
Contrast Setting
50
RGB Controls
100-100-100
Gamma Setting
Default
Color Temperature
5925 K
White Balance dE
5.27
Color dE
7.25
Gamma
2.22

Out of the box and when set on the most accurate picture mode, the monitor still has poor accuracy. Even non-enthusiasts are likely to notice inaccuracies in shades of gray.

9.6
Picture Quality
Post Calibration
Picture Mode
User
Luminance
100 cd/m²
Luminance Settings
20
Contrast Setting
50
RGB Controls
94-91-99
Gamma Setting
2.2
Color Temperature
6521 K
White Balance dE
0.51
Color dE
0.65
Gamma
2.19

After calibration, the Acer Predator XB271HU is much more precise. The white balance and color accuracy are spot on and most of the issues are corrected, especially the white point, which now is right on 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.

8.7
Picture Quality
SDR Color Gamut
sRGB xy
97.7 %
Adobe RGB xy
76.3 %
sRGB Picture Mode
User
Adobe RGB Picture Mode
User

The Acer XB271HU has no issue covering the standard sRGB colorspace, which is great for most uses. Its coverage of the Adobe RGB colorspace, however, is quite limited, making this monitor less useful for professional use.

9.0
Picture Quality
SDR Color Volume
sRGB In ICtCp
96.9 %
Adobe RGB In ICtCp
82.8 %
sRGB Picture Mode
User
Adobe RGB Picture Mode
User

Good native color volume. The monitor has no issue filling up most of its native sRGB colorspace. It does, however, have some difficulty reproducing very dark tones, mostly due to its limited contrast ratio.

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

HDR gamuts aren't supported.

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

HDR color volumes aren't supported.

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

There are no signs of temporary image retention on the Acer Predator XB271HU.

8.6
Picture Quality
Gradient
Color Depth
8 Bit

Great performance for the Acer Predator on our gradient test. Besides the 8-bit banding, there's some little shade imperfection in the grayscale, but most of the rest of the gradient looks good.

9.1
Picture Quality
Color Bleed
Pixel Row Error
0.000 %
Pixel Column Error
0.171 %

Some vertical color bleed is present; however, this won't be noticeable in most situations. It's visible in the vertical photo as different shades of gray above and below each color.

7.4
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
5.2 %
Indirect Reflections
2.6 %
Calculated Direct Reflections
2.6 %

Decent reflection handling, but direct reflections are still bright and distinct, which might be an issue in a bright room.

7.0
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

Decent text clarity. With ClearType enabled (top photo), text is noticeably sharper. This can be especially noticeable with diagonal lines, as seen in the 'N' on the above photos.

Motion
7.1
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Off
Rise / Fall Time
9.6 ms
Total Response Time
17.4 ms
Overshoot Error
0.0 %
Dark Rise / Fall Time
10.8 ms
Dark Total Response Time
19.3 ms
Dark Overshoot Error
0.0 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Normal Chart Table Photo
Extreme Chart Table Photo

The Acer Predator XB271HU has a decent response time when using the 'Off' overdrive setting. The 'Normal' setting has a much faster response time, but there's more noticeable overshoot. We don't recommend using 'OD Extreme', as it introduces significant and easily visible overshoot artifacts behind moving objects.

7.2
Motion
Response Time @ 60Hz
Best Overdrive Setting
Off
Rise / Fall Time
9.4 ms
Total Response Time
17.7 ms
Overshoot Error
0 %
Dark Rise / Fall Time
10.3 ms
Dark Total Response Time
17.7 ms
Dark Overshoot Error
0.0 %

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Off Chart Table Photo
Normal Chart Table Photo
Extreme Chart Table Photo

The 60Hz response time is very similar to the max refresh rate response time. The 'Off' overdrive setting has a decent response time, with no overshoot. Like at the max refresh rate, the 'Normal' response time results in much less blur, but there's noticeable overshoot in many scenes.

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

The Acer Predator XB271HU is completely flicker-free.

7.7
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
Yes
BFI Maximum Frequency
120 Hz
BFI Minimum Frequency
85 Hz

The Acer Predator XB271HU has an optional Black Frame Insertion (BFI) feature, which can be used to add flicker and help reduce persistence blur. This feature is only available with 120Hz, 100Hz, and 85Hz inputs. This is useful for first-person shooters or other fast-paced games.

9.2
Motion
Refresh Rate
Native
144 Hz
Max Refresh Rate
165 Hz
Variable Refresh Rate
Yes
FreeSync
No
G-SYNC
Yes (Native)
VRR Maximum
165 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors DisplayPort

The monitor has a high native refresh rate of 144Hz, which can be overclocked up to 165Hz. This results in very smooth motion and a responsive feel. NVIDIA's G-SYNC on this monitor can adjust the screen's refresh rate to match the frame rate of a compatible graphics card, which allows playing graphically-intensive games with significant framerate drops without tearing or stuttering.

Inputs
9.4
Inputs
Input Lag
Native Resolution
4.6 ms
Native Resolution @ 60Hz
12.7 ms
Variable Refresh Rate
5.3 ms
Variable Refresh Rate @ 60Hz
14.5 ms
10 Bit HDR
N/A
Black Frame Insertion (BFI)
11.0 ms

Excellent low input lag, mostly due to the fast scan time of 144Hz. The 60Hz input lag is much higher, as is the input lag with ULMB (BFI) enabled at 120Hz, but both are still fairly low. The G-SYNC input lag is only slightly higher than the native input lag, which is great.

8.3
Inputs
Resolution And Size
Native Resolution 2560 x 1440
Aspect Ratio 16:9
Megapixels 3.7 MP
Pixel Density
109 PPI
Screen Diagonal 27.0 inches
Screen Area 310 sq inches

The Acer XB271HU has a great 1440p resolution and a large 27" diagonal, giving it lots of screen space while still having good pixel density and detail.

Inputs
Inputs
Inputs
Total Inputs
DisplayPort 1 (DP 1.2)
Mini DisplayPort No
HDMI 1 (HDMI 1.4)
DVI No
VGA No
DisplayPort Out No
USB 2 (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
Power Supply Internal
Features
Features
Additional Features
RGB Illumination
No
Speakers
Yes
HDR10 No
Multiple Input Display
No

It is possible to add a central crosshair to the Predator through the on-screen menu, with the 'Aim Point' option.

Features
On-Screen Display (OSD)
Features
Controls

The controls are located on the bezel at the right of the monitor. They're quite easy to use and feel intuitive.

Features
In The Box

  • Manual
  • HDMI cable
  • USB cable
  • DisplayPort cable
  • 3 pin power cable

Differences Between Sizes and Variants

We tested the Acer Predator XB271HU, which is a 1440p 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
XB271HU bmiprz 27" IPS 1440p 144Hz
XB271HU Abmiprz 27" TN 1440p 144Hz
XB272 bmiprz 27" TN 1080p 240Hz
XB271HU bmiprz 27" IPS 4k 60Hz
XB281HK bmiprz 28" TN 4k 60Hz
XB321HK bmiphz 32" IPS 4k 60Hz
XB273K Pbmiphzx 27" IPS 4k 120Hz

Our Acer Predator XB271HU was manufactured in July 2016.

Compared to other monitors

Comparison picture

Left: Samsung CHG70. Middle: Acer Predator XB271HU. Right: AOC AGON AG271QX

The Acer Predator XB271HU is a high-end monitor with very good overall performance, especially for gaming (see our recommendations for the best gaming monitors). However, it's far from perfect, especially when viewed in a dark room. While it's a good jack-of-all-trades, for specific uses there may be other monitors to consider. See our recommendations for the best monitors.

LG 27GL850-B
SEE PRICE
Amazon.com

The LG 27GL850-B is better than the Acer Predator XB271HU. The LG supports HDR and can handle reflections better, which is important when there are a few lights in your room. The Acer, on the other hand, has a black frame insertion feature that helps make the image look crisper.

ASUS ROG Swift PG279Q
SEE PRICE
Amazon.com

The ASUS ROG PG279Q is better than the Acer Predator XB271HU. The ASUS has slightly better motion blur, which is great for gaming and comes with marginally better out-of-the-box color accuracy that is great for office use. Also, if you plan to use it for media creation, the better black uniformity of the ASUS makes it a better choice.

Dell S2716DGR/S2716DG
SEE PRICE
BestBuy.com

The Acer Predator XB271HU is a monitor that has good viewing angles and performs better in almost all uses than the Dell S2716DG. But if you sit directly in front of the monitor and want the fastest response time for gaming, and an image with minimal blur, get the Dell. The Acer Predator XB271HU has better gray uniformity so that you browse the web without any clouding on your screen. On the other hand, the Dell S2716DG has better reflection handling.

ASUS TUF VG27AQ
SEE PRICE
Amazon.com

The ASUS TUF VG27AQ is much better than the Acer Predator XB271HU. The TUF supports HDR and has a faster refresh rate that improves the appearance of motion. The TUF supports FreeSync for nearly tear-free gaming, while the Predator supports G-SYNC for the same purpose. The TUF has better reflection handling, which is great for a room with a few more lights, and can also display more uniform blacks in a dark room. However, neither of the two monitors can display deep blacks in a dark room due to their IPS panels.

Acer Nitro VG271
SEE PRICE
Amazon.com

The Acer Predator XB271HU is slightly better than the Acer VG271 for most uses and is much better for gaming. The XB271HU has a much better stand, offering a full range of ergonomic adjustments, and it has better motion handling, with a slightly faster response time. The XB271HU also has a higher resolution screen, so you can see more fine details in your favorite games.

LG 27GL83A-B
SEE PRICE
Amazon.com

The LG 27GL83A-B is slightly better than the Acer Predator XB271HU. The LG has a significantly better color accuracy and gradient performance, and it supports HDR, while the Acer has much better ergonomics and has a black frame insertion feature to reduce motion blur. The Acer also has a better contrast ratio, but it can't get as bright as the LG.

Acer Predator XB273K
SEE PRICE
Amazon.com

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.

Acer Predator X27
SEE PRICE
Amazon.com

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.

Gigabyte Aorus AD27QD
SEE PRICE
Amazon.com

The Gigabyte AD27QD is better than the Acer Predator XB271HU. The Gigabyte AD27QD supports HDR content and has a wide color gamut that can display rich and saturated colors. The Gigabyte AD27QD can handle reflections better and supports the FreeSync variable refresh rate technology for tear-free gaming. The Acer, on the other hand, has more uniform blacks and slightly better ergonomics. The Predator supports the G-SYNC variable refresh rate, which is great if you have a compatible NVIDIA graphics card.

Samsung CHG70
SEE PRICE
Amazon.com

The Samsung CHG70 and the Acer Predator XB271HU have similar overall performance. They have different panel types, however, so each one is better than the other in different aspects. The Samsung CHG70 supports HDR and performs decently in that mode, and it also supports local dimming that makes blacks look deep in a dark room. The Samsung CHG70 has better reflection handling and a curve profile that some people like. The Acer Predator XB271HU, on the other hand, has better ergonomics so you can easily position it to your liking. The Acer has wider viewing angles due to its IPS panel, and thus it's easier to share your work.

BenQ Zowie XL2540
SEE PRICE
Amazon.com

The Acer Predator XB271HU is better than the BenQ Zowie XL2540. The Predator has a higher native resolution and larger screen, so you can see more fine details in games. The Predator also has wider viewing angles, which is especially important as the edges of the screen won't fade if you're sitting too close. While both support VRR, the Predator uses NVIDIA's G-SYNC technology, whereas the Zowie uses AMD's FreeSync technology.

ASUS ROG Swift PG279QZ
SEE PRICE
Amazon.com

The ASUS PG279QZ is somewhat better than the Acer Predator XB271HU. The ASUS PG279QZ has marginally better reflection handling, and it ships with a slightly better pre-calibration which is important for office users that usually don't calibrate their monitors.

Acer VG271UP
SEE PRICE
Amazon.com

The Acer Predator XB271HU is slightly better than the Acer VG271UP. The Predator supports G-SYNC VRR, is much easier to position comfortably, and its black uniformity, albeit not good, is not terrible like the Asus. The Asus, on the other hand, supports HDR, though it doesn't add much, and has a little better reflection handling to minimize distractions.

LG 32GK850G-B
SEE PRICE
Amazon.com

These are two different types of monitors, each with advantages and disadvantages. The Acer Predator XB271HU has wider viewing angles and is a better choice if you'll be looking at the monitor from the side, like when you're collaborating with people. The Acer also has a better ergonomic stand that allows you to place it in a comfortable position with ease. The LG 32GK850G is larger, and so you can work more comfortably, and has a better dark room performance with blacks that are more deep and uniform than on the Acer.

AOC AGON AG271QX
SEE PRICE
Amazon.com

These are two different types of monitors, each with their advantages and disadvantages. The Acer Predator XB271HU is a G-SYNC compatible monitor that has wider viewing angles, so the image remains accurate when viewed from the side. The Acer also has better ergonomics so you can position it to your liking with ease. If however, you have a dark room and sit straight in front, the FreeSync compatible AOC AGON AG271QX has more uniform blacks and a faster response time that leaves only a small blur trail behind fast-moving content.

LG 27UK650-W
SEE PRICE
Amazon.com

The LG 27UK650 is a bit better than the Acer Predator XB271HU. The LG 27UK650 is a 4k monitor that supports HDR. It supports FreeSync VRR, can get brighter than the Acer, and has better reflection handling. The Acer Predator, on the other hand, has better ergonomics and is easier to place comfortably. It has a lower input lag and supports G-SYNC VRR over a wider range of frequencies and can offer you a tear-free gaming experience.

Samsung C49HG90/CHG90
SEE PRICE
Amazon.com

The Acer Predator XB271HU is better than the Samsung CHG90. The Acer is equipped with an IPS panel and thus has better viewing angles, which is great for collaborative work. The Acer is also flicker-free and has a faster pixel response time which leaves only a small blur trail. The Samsung CHG90, on the other hand, has a local dimming feature and better contrast ratio and black uniformity, so it performs much better in dark environments. The Samsung CHG90 also has a wide color gamut and supports HDR to enhance your viewing experience.

Dell S2719DGF
SEE PRICE
BestBuy.com

The Acer Predator XB271HU is better than the Dell S2719DGF. The Acer has better viewing angles, an optional black frame insertion feature, and better black uniformity. For gaming, it depends somewhat on your hardware, as the Acer supports G-SYNC variable refresh rate technology whereas the Dell supports FreeSync.