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Reviewed on Nov 09, 2018 , Simon Barbier, Yannick Khong

Acer XF251Q
MONITOR REVIEW

Usage Ratings - Version 1.0

Test Benches:

  • 1.0: Fall 2017
7.1
Mixed Usage
Score components:
Size : 25 "
Resolution : 1920x1080
Refresh Rate : 75 Hz
LCD Type
What it is: Type of LCD technology used by the monitor.
When it matters: Different technologies have different viewing angle properties.
:
TN
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
FreeSync

The Acer XF251Q is a decent 1080p TN monitor with some great gaming features. It has a fast response time, low input lag, and it supports AMD's FreeSync VRR technology. It has a good design, with a great stand that can be easily adjusted to an ideal viewing position. Unfortunately, it has poor viewing angles, so the image degrades when viewed at an angle, and it isn't very accurate out of the box.

Test Results
Design 7.5
Picture Quality 6.1
Motion 8.4
Inputs 8.4
Pros
  • Low input lag
  • Stand has great ergonomics
Cons
  • Image degrades when viewed at an angle
  • Poor accuracy out of the box

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7.5

Design

Score components: Subjectively assigned
Acer XF251Q Design Picture
Curved : No
Curve radius : N/A
Weight (without stand) : 8.2lbs (3.7 kg)
Weight (with stand) : 12.3lbs (5.6 kg)

The Acer XF251Q has a good design. The stand has a large footprint but supports the monitor well. It has great ergonomics, and can easily be adjusted to an optimal viewing position. There is an included headphone bracket that attaches to the stand, which is great. It is mostly made of plastic, but it has a good build quality and there shouldn't be any issues.

Stand
Acer XF251Q Stand picture
Width : 15.3" (38.9 cm)
Depth : 10.6" (26.9 cm)

The stand has a large footprint, and it supports the monitor very well. The is very little wobble when knocked or when adjusting settings.

8.0 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 XF251Q Ergonomics picture
Height Adjustment : 4.5" (11.5 cm)
Switch portrait/landscape : Yes
Swivel Range : -45° to 45°
Tilt Range : -20° to 5°

Great ergonomics. The Acer XF251Q can easily be adjusted to an optimal viewing position. It can rotate to a portrait/landscape orientation, and unlike some monitors with this feature, it can rotate in either direction.

Back
Acer XF251Q Back picture
Wall Mount : VESA 100x100

The back is plain with a simple design. There is a small hole in the stand that works well for cable management. There is also a headphone bracket that can be clipped on to the top of the stand.

Borders
Acer XF251Q Borders picture
Borders : 0.3" (0.7 cm)

The borders are thin, with very little gap between the edge of the bezel and the display. This is a great display for a multi-monitor setup.

Thickness
Acer XF251Q Thickness picture
Thickness (with stand) : 8.5" (21.7 cm)
Thickness (without stand) : 2.2" (5.7 cm)

The stand leans slightly back, so the monitor appears thicker when viewed from the side. It is significantly thicker when on the stand than when VESA mounted.

7.5 Build Quality
What it is: How well built and sturdy the monitor is, and how good the materials used to build it are.
When it matters: All usages.
Score components: Subjectively assigned
Acer XF251Q Build Quality picture

The monitor has a good build quality. It is mostly made from plastic, but it is solid and seems well built, similar to the ASUS VG245H.

The Acer XF251Q has mediocre picture quality. It has a mediocre native contrast ratio, but decent black uniformity. It has decent peak brightness and very good reflection handling, so it looks great in a bright room. It has a great color gamut and excellent color volume, but the Adobe RGB coverage is too limited for professional photo or video editing. Unfortunately, the image degrades when viewed at an angle, and it has poor accuracy out of the box.

6.2 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 XF251Q 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
:
1161 : 1
Contrast with local dimming
What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
N/A

Mediocre contrast ratio, but one of the best TN monitors we've tested so far; only slightly worse than the ASUS VG245H.

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

There is no local dimming feature on this monitor. The video is for reference only.

7.3 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.
:
273 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
:
299 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
:
300 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.
:
300 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.
:
299 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.
:
300 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.
:
300 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.
:
300 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.
:
300 cd/m²
SDR ABL
What it is: The standard deviation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
:
0.000

The Acer XF251Q has decent peak brightness, with no variation in brightness with different content, which is great. The peak brightness is very similar to the ASUS VG245H.

0 HDR Peak Brightness
What it is: How bright the screen can get. Measured with local dimming and with HDR content.
When it matters: HDR content
HDR Real Scene : N/A
HDR Peak 2% Window : N/A
HDR Peak 10% Window : N/A
HDR Peak 25% Window : N/A
HDR Peak 50% Window : N/A
HDR Peak 100% Window : N/A
HDR Sustained 2% Window : N/A
HDR Sustained 10% Window : N/A
HDR Sustained 25% Window : N/A
HDR Sustained 50% Window : N/A
HDR Sustained 100% Window : N/A
HDR ABL : N/A

HDR is not supported on this monitor.

5.2 Horizontal Viewing Angle
What it is: Color accuracy when viewed from the side.
Acer XF251Q 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°
:
30 °
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°
:
28 °
Acer XF251Q 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°
:
47 °
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 XF251Q 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°
:
31 °
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°
:
27 °
Curve Radius : N/A

Disappointing horizontal viewing angles typical of TN monitors. The brightness drops by half at about 45°, which is mediocre, but the black levels increase sharply after about 30°, and the colors shift significantly at about the same angle.

5.1 Vertical Viewing Angle
What it is: Color accuracy when viewed from the top or bottom.
Acer XF251Q Vertical Color Shift Picture
Color Shift from Below
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor from below.
Good value: > 50°
Noticeable difference: 10°
:
9 °
Color Shift from Above
What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the monitor. 0 ° means directly facing the monitor. Measurements are up to a maximum of 75 °.
When it matters: When looking at a monitor when standing up.
Good value: > 50°
Noticeable difference: 10°
:
33 °
Acer XF251Q 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°
:
14 °
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°
:
38 °
Acer XF251Q 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°
:
19 °
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°
:
25 °

Disappointing vertical viewing angles; slightly better than the ASUS VG245H but worse than the ViewSonic XG2402. The XF251Q is definitely best viewed at eye level.

7.5 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
Acer XF251Q 50% Uniformity Picture
50% Std. Dev.
What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
6.636 %
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%
:
0.117 %
Acer XF251Q 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%
:
2.246 %
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%
:
0.078 %

The Acer XF251Q bmiirx has good gray uniformity. The edges of the screen are quite a bit darker due to the poor vertical viewing angles. The center of the screen is more uniform, and there is very little dirty screen effect (DSE). In near-dark scenes, the uniformity is better, and there is almost no DSE.

6.5 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
Acer XF251Q 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.
:
1.690 %
Std. Dev. w/ L.D.
What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: <2%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
N/A

Decent black uniformity, one of the best we've ever tested on a monitor. There is some clouding visible across the entire screen, but there is very little flashlighting, which is great.

5.1 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 XF251Q Pre Calibration Picture Acer XF251Q Pre Gamma Curve Picture Acer XF251Q 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.
:
Graphics
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.
:
307 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
80
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.
:
N/A
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
:
6058 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
:
5.07
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
4.70
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
:
2.14

Out of the box, the Acer XF251Q has poor accuracy. The white balance dE and color dE are very high, to the point where we expect most people will notice the errors. The gamma does not follow the target curve at all, but despite the strange look of the curve we don't expect this to be noticeable for most people.

9.4 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 XF251Q Post Calibration Picture Acer XF251Q Post Gamma Curve Picture Acer XF251Q 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.
:
101 cd/m²
Luminance Settings
What it is: The luminance settings, often named 'Brightness' on monitors, usually range from 0 to 100.
:
14
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.
:
43-49-50
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
:
6499 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
:
0.58
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
1.15
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
:
2.17

After calibration, nearly all of the white balance and color errors were corrected. Gamma follows the target curve nearly perfectly, but some scenes will be too bright. The color temperature is nearly spot-on the 6500 K target. Some colors are still inaccurate, but this shouldn't be noticeable by most people.

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.

8.3 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 XF251Q 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%
:
92.5 %
Acer XF251Q 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%
:
73.7 %

s.RGB Picture Mode: User (calibrated)
Adobe RGB Picture Mode: User

Great SDR color gamut. Excellent s.RGB coverage, but it doesn't quite cover the entire gamut. Coverage of the wider Adobe RGB color space isn't as good, and is not ideal for professional photo or video editing.

8.6 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 XF251Q 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
:
93.5 %
Acer XF251Q 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
:
77.7 %

s.RGB Picture Mode: User
Adobe RGB Picture Mode: User

Great SDR color volume. It is mainly limited by the native contrast, as it can't produce deep, dark colors very well. Like many monitors, it can't produce very bright blues, but overall it fills out its gamut well in most luminance levels.

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

HDR is not supported on this monitor.

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

HDR is not supported on this monitor.

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 XF251Q 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 are no signs of temporary image retention, even immediately after displaying our high-contrast static test image for 10 minutes.

7.9 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 XF251Q Gradient Picture
Color Depth
What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like HDR video games or HDR UHD movies. Won't matter for regular Blu-ray movies, SDR video game or desktop environment content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
8 Bit

The Acer XF251Q has very good gradient reproduction. There is some noticeable banding in darker colors, but this shouldn't be very noticeable under most viewing conditions.

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 XF251Q 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 XF251Q Color bleed vertical
Pixel column error
What it is: Amount of color bleeding that appears across the screen vertically.
When it matters: Most uses of a PC monitor. Can appear while browsing the web or when editing images or graphics.
Good value: <0.2%
Noticeable difference: 0.1%
:
0.000 %

Perfect color control, as there is no measurable color bleed.

7.5 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
Acer XF251Q Average room Acer XF251Q Average room off picture Acer XF251Q Bright room off picture

Very good reflection handling. There should be no issues using this monitor in a bright room.

8.4

Motion

Score components:

The Acer XF251Q has great motion handling. It has an extremely fast response time, so fast moving objects have very little blur trail behind them, but some transitions have significant overshoot that may be distracting to some people. The backlight is flicker-free, but it lacks a BFI feature that could reduce persistence blur. The 75 Hz refresh rate is good, but some gamers may be disappointed. It supports AMD FreeSync, which is great.

9.4 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 XF251Q Motion Blur Picture Acer XF251Q Response Time Chart
80% Response Time
What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 8 ms
Noticeable difference: 4 ms
:
2.9 ms
100% Response Time
What it is: How quickly pixels can fully transition from one color to another.
When it matters: When there's fast movement on screen, such as during video games and sports.
Good value: < 20 ms
Noticeable difference: 10 ms
:
12.2 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 Off Motion Photo
Over Drive Normal
Over Drive Normal Motion Photo
Over Drive Extreme
Over Drive Extreme Motion Photo

The XF251Q has an excellent fast response time, but there is significant overshoot with any Over Drive setting. This causes some noticeable haloing around moving objects, as seen in the above motion photos.

When connected to a FreeSync compatible device, like a PC with an AMD graphics card or an Xbox One S/X, the Over Drive option is locked to 'Normal'. On our test PC it was impossible to change the setting even with FreeSync disabled. On the Xbox On S/X however, disabling FreeSync allowed us to change the Over Drive setting.

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 XF251Q 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
:
N/A
BFI Maximum Frequency
What it is: Highest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: Matches the native refresh rate
Noticeable difference: 20 Hz
:
N/A
BFI Minimum Frequency
What it is: Lowest possible frequency of flickering pattern
When it matters: Reduces eye-tracking blur in motion
Good value: 60 Hz
Noticeable difference: 20 Hz
:
N/A

The Acer XF251Q is completely flicker-free, as it directly dims the backlight without using PWM. Unfortunately, it does not have an optional black frame insertion feature to reduce persistence blur.

8.2 Refresh Rate
What it is: How frequently the monitor can refresh and show new frames, and whether it can vary its refresh rate in real time using technologies like G-sync and FreeSync.
When it matters: Mostly for gaming, but does provide a little better motion during normal usage.
Native
What it is: The frequency at which the monitor is capable of displaying images every second
When it matters: General usage, but better results are most important for gaming
Good value: >100 Hz
Noticeable difference: 15 Hz
:
75 Hz
Factory Overclock
What it is: The frequency at which the monitor's can be boosted to using its internal menu.
When it matters: Gaming and other usages where high frame rate content is consumed.
Good value: >100
Noticeable difference: 15
:
N/A
Variable Refresh Rate
What it is: Feature that allows the monitor to synchronize its refresh rate with the input device's output and reduces stuttering and screen tearing.
When it matters: Almost every usage, but is most noticeable in gaming where constant fluctuation in framerate cause distracting artifacts.
:
FreeSync
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
:
75 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
:
40 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
:
N/A
VRR Supported Connectors : HDMI

The Acer XF251Q has a 75 Hz native refresh rate, which while better than a 60 Hz monitor, might not be fast enough for more serious gamers. It supports FreeSync VRR, but has a limited range, and no LFC as the VRR minimum is too close to the native refresh rate. This means that in more intense scenes, there may be tearing if the frame rate drops below 40 fps

8.4

Inputs

Score components:

The Acer XF251Q has excellent low input lag, great for gaming. It has a 24.5" screen, but it is limited to a 1080p resolution that isn't great for multitasking. It has two HDMI inputs and a VGA input, but it doesn't support DVI or DisplayPort without using adapters.

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

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

Native Resolution Non-Native Resolution Tested
4k UHD QHD
QHD FHD
FHD 1600x900
3440x1440 2560x1080
2560x1080 1920x1080
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
Native Resolution @ 60 Hz
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying its native resolution at a refresh rate of 60 Hz.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
8.8 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
:
7.4 ms
HDR
What it is: Lowest input lag possible at the center of the screen, when the monitor is displaying an HDR signal at its native resolution and refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A
Black Frame Insertion (BFI)
What it is: Lowest input lag possible at the center of the screen, when BFI is enabled and the monitor is displaying a signal at the highest supported BFI refresh rate.
When it matters: General usage as well as gaming.
Good value: < 15 ms
Noticeable difference: 5 ms
:
N/A

Excellent low input lag, even with the refresh rate set to 60 Hz. Non-native resolutions are not properly supported, as they are always upscaled to 1080p without you knowing, and there is no option to disable upscaling.

7.2 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 : FHD, 1920 x 1080
Aspect Ratio : 16:9
Megapixels : 2.1 MP
Pixel Density : 90 PPI
Screen Diagonal : 24.5 inches
Screen Area : 257 sq inches

The Acer XF251Q has a 24.5" screen and a 1080p resolution, good for casual use, but many users may find this too small for more serious work.

Inputs
Total Inputs
DisplayPort : No
Mini DisplayPort : No
HDMI : 2 (HDMI 1.4)
DVI : No
VGA : 1
DisplayPort Out : No
USB : No
USB C : No
Analog Audio Out 3.5mm : 1
Microphone In 3.5mm : 1
Digital Optical Audio Out : No
Analog Audio Out RCA : No

There are two HDMI inputs and a VGA port, but no DisplayPort or DVI. There is a 3.5mm analog audio out port, it is a headphone port with adjustable volume on the monitor's on screen display.

Features

The Acer XF251Q has a few additional features. It has built-in speakers, but it does not support HDR. There are a few additional features for gamers, but it lacks more advanced image processing features found on more expensive gaming monitors.

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

There are a few additional additional features on the XF251Q. It has built-in speakers, but does not support HDR.

  • Game Modes: There are three preset configurations for Action, Racing, and Sports, and a fourth setting that can be customized to your liking.
  • Aim Point: There are three selectable cross-hairs that can be added, good for FPS games that don't have one.

On-Screen Display (OSD)
Controls
In The Box
Acer XF251Q In The Box picture

  • User Guide
  • Audio cable
  • VGA Cable
  • Power Cable
  • HDMI Cable
  • Headphone Bracket

Differences between Sizes and Variants

We tested the 24.5" Acer XF251Q, model number bmiirx. There are other models in the XF series, but beyond FreeSync support they have different specifications.

If someone comes across a different type of panel or if their Acer XF251Q 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 Resolution Refresh Rate Notes
XF251Q 24.5" 1080p 75 Hz FreeSync
XFA240 24" 1080p 144 Hz FreeSync, DVI
XF270H B 27" 1080p 144 Hz FreeSync
XF250Q A 24.5" 1080p 240 Hz FreeSync, DVI
XF250Q B 24.5" 1080p 144 Hz FreeSync
XF250Q C 24.5" 1080p 240 Hz FreeSync

The XF251Q we reviewed was manufactured in July 2017

Compared to other Monitors

Acer XF251Q Group Shot Picture
Left: ViewSonic XG2402. Middle: Acer XF251Q. Right: LG 24MP59G-P.
Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The Acer XF251Q is a decent entry-level monitor with great gaming performance. See our recommendations for the best monitors under $200.

ASUS VG245H

The Acer XF251Q is slightly better than the ASUS VG245H. Both models are 75 Hz TN monitors, with FreeSync support. Both offer very similar performance, but the XF251Q we reviewed had better black uniformity and much better color volume. The ASUS VG245H is much more accurate out of the box, but a few settings changes on the XF251Q can correct this.

ViewSonic XG2402

The ViewSonic XG2402 is better than the Acer XF251Q. The XG2402 has much better motion performance, thanks to the faster 144 Hz refresh rate. The XG2402 is also a bit brighter, and has a better color gamut and better color volume.

Dell S2417DG

The Dell S2417DG is better than the Acer XF251Q. The S2417DG has much better motion handling, thanks to a much faster refresh rate, faster response time, and optional black frame insertion feature. The Dell also has slightly less input lag. While the Acer XF251Q supports AMD's FreeSync VRR, the Dell S2417DG supports NVIDIA's G-SYNC instead, so the compatibility with your graphics card should be taken into account when choosing between these two.

Acer GN246HL

The Acer XF251Q is much better than the Acer GN246HL. The GN246HL has a faster 144 Hz refresh rate, but it does not support any variable refresh rate technologies like FreeSync or G-Sync. The XF251Q has a 75 Hz refresh rate, but it supports FreeSync. The Acer GN246HL uses PWM to dim the backlight, and this causes flicker that may bother some people, whereas the XF251Q is flicker-free. Finally, the XF251Q has much less input lag, especially when gaming at 60 Hz.

Samsung CF398

The Acer XF251Q is a 25" TN monitor, whereas the Samsung CF398 is a VA monitor. The XF251Q has better motion handling, thanks to a faster response time. The XF251Q is a bit brighter, but the CF398 has much better native contrast, so it looks better in a dark room.

+ Show more

Conclusion
SEE PRICE
Amazon.com

7.1Mixed Usage
Score components:
The Acer XF251Q is a decent monitor for most uses. It has great motion handling and low input lag for gaming, and it supports FreeSync VRR. The stand has great ergonomics, so it can easily be placed in an ideal viewing position. Unfortunately, the image degrades when viewed at an angle, and the 1080p resolution and 25" screen may be too small for some users, and it isn't ideal for multitasking.
The XF251Q is a decent monitor for office use. It has great ergonomics, so it is easy to place it in the ideal viewing position. It has decent peak brightness and great reflection handling, so it looks good in bright offices. Unfortunately, the 25", 1080p screen isn't ideal for multitasking, and the image loses accuracy when viewed at an angle.
Great monitor for gaming. It has an excellent fast response time, but some transitions have a lot of overshoot that can bother some people. It has excellent low input lag, and it supports AMD FreeSync VRR technology for a tear-free gaming experience. Unfortunately, the 25" 1080p screen isn't very immersive.
Decent monitor for multimedia. It has a fast response time, so fast motion scenes look clear, with little motion blur trail. It also has excellent low input lag and great reflection handling. Unfortunately, it is limited to a 1080p resolution that may be insufficient for some people, and the image loses accuracy when viewed at an angle.
Decent monitor for media creation. It has excellent low input lag and a fast response time, and it has excellent coverage of the sRGB color space. Unfortunately, the Adobe RGB coverage isn't ideal for professional photo or video editing, and the 1080p resolution limits how much of your project you can see, and makes it harder to multitask.
The Acer XF251Q does not support HDR. For a good HDR monitor, check out the Samsung CHG70.

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