Dell Alienware AW2521H Monitor Review

Tested using Methodology v1.1
Reviewed Dec 04, 2020 at 10:16 am
Dell Alienware AW2521H Picture
8.0
Mixed Usage
7.9
Office
8.6
Gaming
7.8
Multimedia
7.9
Media Creation
7.3
HDR Gaming
Size 25"
Resolution 1920x1080
Max Refresh Rate
360 Hz
Pixel Type
IPS
Variable Refresh Rate
G-SYNC

The Dell Alienware AW2521H is an excellent gaming monitor. It's one of the first few monitors released with an extremely high 360Hz refresh rate, which helps deliver an incredible response time with silky smooth motion. It also has an exceptionally low input lag and native G-SYNC variable refresh rate (VRR) support, but it doesn't support FreeSync. It's really well-built and offers great ergonomics, so you shouldn't have any difficulty placing it in an ideal viewing position. It has an IPS panel with wide viewing angles, but that comes at the cost of a low contrast ratio, so blacks appear closer to gray when viewed in the dark. The smaller screen and 1080p resolution may be too limiting for office use, but the lower resolution isn't too taxing on your graphics card when gaming.

Our Verdict

8.0 Mixed Usage

The Dell Alienware AW2521H is great overall. It's excellent for gaming thanks to its extremely high 360Hz refresh rate, G-SYNC support, exceptionally low input lag, and incredible response time. It's good for office use because it has great ergonomics and wide viewing angles, but the 1080p resolution may be too limiting for some. It has a decent HDR peak brightness, but it doesn't display a wide color gamut and has a low contrast ratio, so blacks appear gray.

Pros
  • Wide viewing angles.
  • 360Hz refresh rate.
  • Exceptionally low input lag.
  • Incredible response time.
Cons
  • Limiting resolution and size.
  • Low contrast ratio.
7.9 Office

The Dell Alienware AW2521H is good for office use. It has great ergonomics and wide viewing angles, making it easy to share your screen with others around you. It gets bright enough to combat glare in well-lit rooms, and it has good reflection handling. However, the 25 inch screen and 1080p resolution may be too limiting for multitasking.

Pros
  • Wide viewing angles.
  • Great ergonomics.
  • Performs well in bright environments.
Cons
  • Limiting resolution and size.
  • Text can appear a bit blurry.
8.6 Gaming

The Dell Alienware AW2521H is excellent for gaming. It has an extremely high 360Hz refresh rate with an incredible response time, resulting in smooth motion. Input lag is exceptionally low and it has native G-SYNC support. Its IPS panel has a low contrast ratio, so it's not ideal for dark-room gaming, but it has wide viewing angles if you want to share your screen with someone else.

Pros
  • 360Hz refresh rate.
  • Exceptionally low input lag.
  • Incredible response time.
  • Native G-SYNC support.
Cons
  • Low contrast ratio.
7.8 Multimedia

The Dell Alienware AW2521H is good for consuming media. It has wide viewing angles, so you can easily watch your favorite videos with a few friends. However, the 1080p resolution may be too low for some people. Also, it has a low contrast ratio, so blacks appear closer to gray when viewed in the dark.

Pros
  • Wide viewing angles.
  • Performs well in bright environments.
  • Exceptionally low input lag.
Cons
  • Limiting resolution and size.
  • Low contrast ratio.
7.9 Media Creation

The Dell Alienware AW2521H is very good for content creators. It has great ergonomics and wide viewing angles, making it easy to share your screen with a coworker or client. It performs well in bright rooms thanks to its impressive peak brightness and good reflection handling. However, the 1080p resolution and 25 inch screen isn't ideal if you work with multiple windows opened side-by-side.

Pros
  • Wide viewing angles.
  • Great ergonomics.
  • Exceptional gradient handling.
Cons
  • Limiting resolution and size.
  • Low contrast ratio.
7.3 HDR Gaming

The Dell Alienware AW2521H is decent for HDR gaming mainly due to its excellent gaming performance. It has a fast 360Hz refresh rate, an incredible response time, and exceptionally low input lag. It gets decently bright in HDR, but it has a low contrast ratio and fails to display a wide color gamut, so HDR content doesn't look all that different from SDR.

Pros
  • 360Hz refresh rate.
  • Incredible response time.
  • Decent HDR peak brightness.
Cons
  • Low contrast ratio.
  • Can't display wide color gamut.
  • No local dimming.
  • 8.0 Mixed Usage
  • 7.9 Office
  • 8.6 Gaming
  • 7.8 Multimedia
  • 7.9 Media Creation
  • 7.3 HDR Gaming
  1. Updated Aug 20, 2021: We corrected a mistake in the measured diagonal of the screen.
  2. Updated Dec 04, 2020: Review published.
  3. Updated Nov 30, 2020: Early access published.

Video

Test Results

perceptual testing image
Design
Design
Style
Curved No
Curve Radius Not Curved
Weight (without stand)
9.9 lbs (4.5 kg)
Weight (with stand)
17.0 lbs (7.7 kg)

The Dell Alienware AW2521H looks exactly like the Dell Alienware AW2521HF. It has a black body with thin bezels on three sides and a thicker bottom bezel. It has a gamer-oriented design with RGB lighting on the back.

Design
Stand
Width
18.3" (46.5 cm)
Depth
10.3" (26.1 cm)

This monitor has a wide V-shaped stand that takes up a good amount of space. Luckily, there's still room between the legs to place stuff. It supports the screen well and there's minimal wobble.

8.0
Design
Ergonomics
Height Adjustment
5.1" (13.0 cm)
Switch Portrait/Landscape Yes, Both Ways
Swivel Range -20° to 20°
Tilt Range -20° to 5°

The Dell Alienware AW2521H has great ergonomics. Its swivel range is a bit narrow, but you can switch it into portrait mode in either direction.

Design
Back
Wall Mount VESA 100x100

The back of this monitor has a gamer-oriented design with RGB lighting on the stand and the Alienware logo at the top right. There's a hole in the stand for cable management and there's a quick-release button to remove the stand.

Design
Borders
Borders
0.3" (0.7 cm)

The bezels are thin and aren't distracting, great for a multi-monitor setup.

Design
Thickness
Thickness (with stand)
8.9" (22.6 cm)
Thickness (without stand)
3.3" (8.4 cm)

The screen itself is fairly thick, and it gets much thicker with the stand attached.

8.5
Design
Build Quality

The Dell Alienware AW2521H has an excellent build quality. It's made entirely out of plastic, and it feels solid throughout. It's well-built, it doesn't wobble, and there aren't any obvious loose parts.

Picture Quality
6.5
Picture Quality
Contrast
Native Contrast
1,336 : 1
Contrast With Local Dimming
N/A

The Dell Alienware AW2521H has an okay contrast ratio, and it's actually better than most IPS panels. However, blacks still appear closer to gray when viewed in the dark, and this may vary between units.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

The Dell Alienware AW2521H doesn't have a local dimming feature. The video above is provided for reference only.

8.3
Picture Quality
SDR Peak Brightness
SDR Real Scene
440 cd/m²
SDR Peak 2% Window
435 cd/m²
SDR Peak 10% Window
436 cd/m²
SDR Peak 25% Window
436 cd/m²
SDR Peak 50% Window
437 cd/m²
SDR Peak 100% Window
437 cd/m²
SDR Sustained 2% Window
434 cd/m²
SDR Sustained 10% Window
436 cd/m²
SDR Sustained 25% Window
436 cd/m²
SDR Sustained 50% Window
437 cd/m²
SDR Sustained 100% Window
437 cd/m²
SDR ABL
0.000

The Dell Alienware AW2521H has impressive peak brightness. It easily gets bright enough to combat glare, and it maintains its brightness very consistent across different content. We measured peak brightness after calibration in the 'Custom Color' Picture Mode with Brightness set to max.

7.1
Picture Quality
HDR Peak Brightness
HDR Real Scene
457 cd/m²
HDR Peak 2% Window
464 cd/m²
HDR Peak 10% Window
466 cd/m²
HDR Peak 25% Window
466 cd/m²
HDR Peak 50% Window
467 cd/m²
HDR Peak 100% Window
466 cd/m²
HDR Sustained 2% Window
464 cd/m²
HDR Sustained 10% Window
466 cd/m²
HDR Sustained 25% Window
466 cd/m²
HDR Sustained 50% Window
466 cd/m²
HDR Sustained 100% Window
466 cd/m²
HDR ABL
0.000

The Dell Alienware AW2521H has decent HDR peak brightness. It gets bright enough to make some highlights stand out in HDR games, but it may not be enough for a satisfying HDR movie experience. Like with its SDR brightness, it's very consistent across different content. We measured peak brightness in the 'Custom Color' Picture Mode, and the Brightness setting automatically locks to '100' when in HDR.

8.0
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
35°
Color Washout From Right
37°
Color Shift From Left
47°
Color Shift From Right
50°
Brightness Loss From Left
38°
Brightness Loss From Right
41°
Black Level Raise From Left
70°
Black Level Raise From Right
70°
Gamma Shift From Left
58°
Gamma Shift From Right
59°

The Dell Alienware AW2521H has a great horizontal viewing angle, which is expected from an IPS panel. The image remains accurate when viewing from the side, so it's ideal for co-op gaming.

7.1
Picture Quality
Vertical Viewing Angle
Color Washout From Below
28°
Color Washout From Above
29°
Color Shift From Below
69°
Color Shift From Above
67°
Brightness Loss From Below
32°
Brightness Loss From Above
33°
Black Level Raise From Below
49°
Black Level Raise From Above
70°
Gamma Shift From Below
28°
Gamma Shift From Above
30°

The Dell Alienware AW2521H has a decent vertical viewing angle. However, you may notice a loss in image accuracy if you mount it above eye-level.

8.7
Picture Quality
Gray Uniformity
50% Std. Dev.
3.466%
50% DSE
0.103%
5% Std. Dev.
0.413%
5% DSE
0.059%

The gray uniformity is excellent, but this may vary between units. The edges are a bit darker, but there's minimal dirty screen effect in the center. Uniformity is much better in near-dark scenes.

5.4
Picture Quality
Black Uniformity
Native Std. Dev.
2.390%
Std. Dev. w/ L.D.
N/A

The Dell Alienware AW2521H has poor black uniformity, but this may vary between units. There's severe backlight bleed in the corners and clouding throughout. This can get distracting in dark scenes.

9.1
Picture Quality
Pre Calibration
Picture Mode
Custom Color
Luminance
212 cd/m²
Luminance Settings
75
Contrast Setting
75
RGB Controls
100-100-100
Gamma Setting
No Gamma Setting
Color Temperature
6,790 K
White Balance dE
1.56
Color dE
1.02
Gamma
2.21

The Dell Alienware AW2521H has outstanding out-of-the-box accuracy, but this may vary between units. There are hardly any inaccuracies with white balance and most colors. Gamma follows the target curve well, but some scenes may be too dark. The color temperature is on the cold side, giving the image a blueish tint.

9.7
Picture Quality
Post Calibration
Picture Mode
Custom Color
Luminance
101 cd/m²
Luminance Settings
29
Contrast Setting
75
RGB Controls
100-96-93
Gamma Setting
No Gamma Setting
Color Temperature
6,498 K
White Balance dE
0.46
Color dE
0.47
Gamma
2.18

The accuracy after calibration is exceptional. Any remaining inaccuracies can't be spotted without the aid of a colorimeter, and the color temperature is almost spot-on with our 6500K target. The gamma is a bit worse than before calibration, as some scenes are over-brightened, but most people won't notice a difference.

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.

8.6
Picture Quality
SDR Color Gamut
sRGB xy
98.8%
Adobe RGB xy
73.0%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color

The Dell Alienware AW2521H has an excellent SDR color gamut, almost exactly like the Dell Alienware AW2521HF. It has perfect coverage of the sRGB color space used in most content and decent coverage of the Adobe RGB color space used in photo editing.

8.7
Picture Quality
SDR Color Volume
sRGB In ICtCp
96.8%
Adobe RGB In ICtCp
78.0%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color

This monitor has an excellent color volume. It displays bright colors well but struggles with dark colors due to its low contrast ratio.

6.9
Picture Quality
HDR Color Gamut
Wide Color Gamut
No
DCI P3 xy
79.8%
Rec. 2020 xy
58.3%
DCI P3 Picture Mode
Custom Color
Rec. 2020 Picture Mode
Custom Color

The Dell Alienware AW2521H has an okay HDR color gamut, but it's not considered a wide color gamut for HDR content. It has good coverage of the commonly-used DCI P3 color space, but very limited coverage of the wider Rec. 2020.

Due to the way we measure the DCI P3 coverage, our measurement is likely lower than most other reviewers. We measure it by sending a Rec. 2020 signal, but unlike most reviewers, we limit the colors to the DCI P3 primaries. This results in a lower but arguably more accurate measurement.

6.7
Picture Quality
HDR Color Volume
DCI-P3 In ICtCp
77.5%
Rec. 2020 In ICtCp
55.9%
DCI P3 Picture Mode
Custom Color
Rec. 2020 Picture Mode
Custom Color

The HDR color volume is okay. It's mainly limited by the monitor's low contrast ratio and lack of a wide color gamut.

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 image retention after displaying a high-contrast static image, but this may vary between units.

9.6
Picture Quality
Gradient
Color Depth
10 Bit

The gradient handling is exceptional. There's minimal banding throughout and you shouldn't notice any banding with real content. It's advertised to have an 8-bit panel, but we can achieve 10-bit in the EDID of the monitor, so it may be 8-bit with FRC, but we don't know for sure. The max refresh rate with a 10-bit source over a DisplayPort connection is 300Hz, and 144Hz over an HDMI connection.

9.6
Picture Quality
Color Bleed
Pixel Row Error
0.000%
Pixel Column Error
0.073%

There's some very minor color bleed when displaying vertical bands of color, but this shouldn't be noticeable with real content.

7.5
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
5.8%
Indirect Reflections
4.0%
Calculated Direct Reflections
1.8%

The Dell Alienware AW2521H 's reflection handling is good, but it's not as good as the Dell Alienware AW2521HF. It still performs well in most well-lit environments; however, it may be best to avoid placing it opposite a window.

7.0
Picture Quality
Text Clarity
Sub-Pixel Layout
RGB

The text clarity is decent. Enabling ClearType (top photo) helps improve the appearance of diagonal lines, as seen on the R, N, G, and S, but makes straight lines less bold, as seen on the T and I.

Motion
9.7
Motion
Response Time @ Max Refresh Rate
Best Overdrive Setting
Fast
Rise / Fall Time
3.0 ms
Total Response Time
6.6 ms
Overshoot Error
0.0%
Dark Rise / Fall Time
3.7 ms
Dark Total Response Time
8.0 ms
Dark Overshoot Error
0.0%

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Fast Chart Table Photo
Super-Fast Chart Table Photo
Extreme Chart Table Photo

The Dell Alienware AW2521H has an incredible response time at its max refresh rate of 360Hz. Motion looks exceptionally smooth and you shouldn't notice any motion artifacts. The recommended overdrive setting is 'Fast' as the other settings have too much overshoot. It performs about the same as the other 360Hz monitors we've tested, but is slightly faster than the MSI Oculux NXG253R.

9.1
Motion
Response Time @ 60Hz
Best Overdrive Setting
Fast
Rise / Fall Time
4.0 ms
Total Response Time
11 ms
Overshoot Error
2.1%
Dark Rise / Fall Time
4.5 ms
Dark Total Response Time
11.1 ms
Dark Overshoot Error
1.4%

Overdrive Setting Response Time Chart Response Time Tables Motion Blur Photo
Fast Chart Table Photo
Super-fast Chart Table Photo
Extreme Chart Table Photo

The response time at 60Hz is outstanding, and once again, you shouldn't notice any motion artifacts with fast-moving content. The recommended overdrive setting is 'Fast'; it has a bit of overshoot in lighter transitions, but it's significantly less than the other settings.

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

The Dell Alienware AW2521H has a flicker-free backlight, which helps reduce eye strain.

5.8
Motion
Black Frame Insertion (BFI)
Black Frame Insertion (BFI)
Yes
BFI Maximum Frequency
240 Hz
BFI Minimum Frequency
144 Hz

This monitor has a Black Frame Insertion to help reduce motion blur. However, it has a narrow flicker range, and you can't use it with VRR enabled.

9.7
Motion
Refresh Rate
Native
360 Hz
Max Refresh Rate
360 Hz
Variable Refresh Rate
Yes
FreeSync
No
G-SYNC
Yes (Native)
VRR Maximum
360 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors DisplayPort, HDMI

The Dell Alienware AW2521H has an incredible refresh rate. Along with the ASUS ROG Swift 360Hz PG259QN, it's one of the few monitors with a 360Hz refresh rate. You can reach a maximum of 360Hz over a DisplayPort connection, and 240Hz over an HDMI connection. It has native G-SYNC support, but FreeSync doesn't work on it all, and the screen flashes.

Inputs
9.7
Inputs
Input Lag
Native Resolution
1.7 ms
Native Resolution @ 60Hz
8.4 ms
Variable Refresh Rate
2.0 ms
Variable Refresh Rate @ 60Hz
9.3 ms
10 Bit HDR
N/A
Black Frame Insertion (BFI)
5.5 ms

The Dell Alienware AW2521H has an exceptionally low input lag. It stays low with VRR enabled, which is great for competitive gaming. We measured BFI input lag at its max flicker frequency of 240Hz. We didn't measure the 10-bit HDR input lag because its max 10-bit refresh rate of 300Hz is only achievable over a DisplayPort connection, and we lack the tools to measure HDR input lag over DisplayPort. However, we don't expect the input lag to be a significant increase from the input lag at its native resolution.

7.1
Inputs
Resolution And Size
Native Resolution 1920 x 1080
Aspect Ratio 16:9
Megapixels 2.1 MP
Pixel Density
91 PPI
Screen Diagonal 24.5"
Screen Area 255 in²

Update 08/20/2021: We corrected a mistake in the measured diagonal of the screen.

Dell Alienware AW2521H has a decent size and resolution. The 25 inch screen size and 1080p resolution may be too limiting for multitasking, but it's great for gaming as the lower resolution helps achieve higher frame rates.

Inputs
Inputs
Inputs
Total Inputs
DisplayPort 1 (DP 1.4)
Mini DisplayPort No
HDMI 2 (HDMI 2.0)
DVI No
VGA No
DisplayPort Out No
USB 4 (USB 3.0)
USB C No
Analog Audio Out 3.5mm 2
Microphone In 3.5mm No
Digital Optical Audio Out No
Analog Audio Out RCA No
Power Supply Internal

One of the USB inputs can be used for power delivery, so you can charge your mobile devices, but it doesn't work when the monitor is off.

Features
Features
Additional Features
RGB Illumination
Controllable
Speakers
No
HDR10 Yes
Multiple Input Display
No

The Dell Alienware AW2521H has a few extra features to help improve the user experience.

  • Alien FX RGB Control: Interface used to customize the RGB lighting on the back.
  • NVIDIA Reflex: Helps measure the input lag and reduce it.
  • Timer: Displays a time on the screen.
  • FPS Counter: Displays the current frame rate.
  • Display Alignment: Helps with alignment when setting up multiple monitors.

Features
On-Screen Display (OSD)
Features
Controls

There's a joystick and four buttons on the back of the monitor to control the on-screen display.

Features
In The Box

  • Power cable
  • DisplayPort cable
  • Mini DisplayPort cable
  • USB to USB-B upstream cable
  • User guide

Differences Between Sizes And Variants

We tested the Dell Alienware AW2521H, and there are no other variants. However, there are many monitors in the Dell Alienware lineup with various configurations, some of which you can see in the table below.

 Model  Size Panel Resolution Max Refresh Rate VRR HDR Body Color
AW2518HF 25" TN 1080p 240Hz FreeSync  No Silver
AW2521H 25" IPS 1080p 360Hz G-SYNC Yes Black
AW2521HF 25" IPS 1080p 240Hz FreeSync and G-SYNC No Black
AW2521HFL 25" IPS 1080p 240Hz FreeSync and G-SYNC No White
AW2720HF 27" IPS 1080p 240Hz FreeSync and G-SYNC No  White
AW2721D 27" IPS 1440p 240Hz G-SYNC Yes White

If someone comes across a different type of panel or if their Dell Alienware AW2521H doesn't correspond to our review, let us know and we'll update the review. Note that some tests, such as the gray uniformity, may vary between individual units.

Our unit of the AW2521H was manufactured in October 2020 and you can see the label here.

Compared To Other Monitors

The Dell Alienware AW2521H is a great 360Hz monitor and very similar to the ASUS ROG Swift 360Hz PG259QN and the MSI Oculux NXG253R. It has an incredible response time and exceptionally low input lag. However, most gamers won't notice the difference between 360Hz and 240Hz panels, which you can get for less, such as the Dell Alienware AW2521HF, or the 280Hz ASUS TUF Gaming VG259QM. Also see our recommendations for the best gaming monitors, the best monitors for PS5, and the best monitors for Xbox Series X.

Gigabyte M27Q

The Dell Alienware AW2521H has a better response time and higher refresh rate than the Gigabyte M27Q, but the difference might not be noticeable to casual players. The Gigabyte has a larger screen and higher resolution, and it offers more features, like USB-C input and a Picture-in-Picture mode. The Dell has native G-SYNC support, while the Gigabyte has native FreeSync support and G-SYNC compatibility.

Dell Alienware AW2521HF

The Dell Alienware AW2521H is better than the Dell Alienware AW2521HF. The AW2521H has a 360Hz refresh rate, it supports HDR, has significantly better gradient handling,  and lower input lag. However, the AW2521HF has much better reflection handling and a wider horizontal viewing angle.

BenQ ZOWIE XL2546K

The Dell Alienware AW2521H is better than the BenQ ZOWIE XL2546K. The Dell has a higher refresh rate of 360Hz and a slightly better response time, resulting in smoother motion and greater responsiveness. It also has a better contrast ratio, wider viewing angles, and gets brighter to combat glare. The Dell has more features, like HDR support and a USB hub with four USB 3.0 ports.

ASUS ROG Swift 360Hz PG259QN

The ASUS ROG Swift 360Hz PG259QN and the Dell Alienware AW2521H are very similar 360Hz monitors. The Dell has a better response time, it gets brighter, and has better ergonomics. However, the ASUS has better reflection handling and better color accuracy.

ASUS TUF Gaming VG259QM

The ASUS TUF Gaming VG259QM is slightly better for gaming than the Dell Alienware AW2521H. The ASUS has significantly better ergonomics, a bit better reflection handling, a wider BFI flicker range, and it has built-in speakers. However, the Dell has a higher 360Hz refresh rate, better response time, and slightly lower input lag.

Dell Alienware AW2721D

The Dell Alienware AW2721D and the Dell Alienware AW2521H are both great monitors that perform similarly in many ways, but they have different resolutions and sizes. The AW2521H is one of the rare monitors with a 360Hz max refresh rate, while the AW2721D has a max refresh rate of 240Hz, but the difference likely won't be noticeable to most gamers. That said, the AW2521H has a slightly better response time with less overshoot and better reflection handling. On the other hand, the AW2721D has a better color gamut and brightness for HDR, and it feels more well-built.

Samsung Odyssey G7 LC32G75T

The Samsung Odyssey G7 LC32G75T is a bit better overall than the Dell Alienware AW2521H, but they have very different features. The Samsung is a 144op, 240Hz monitor with a VA panel. This allows it to produce deep blacks and crisp images. It also has a quicker response time at 60Hz and has FreeSync support. On the other hand, the Dell is a 1080p, 360Hz monitor with an IPS panel. It has much wider viewing angles, a quicker response time at its max refresh rate, lower input lag, native G-SYNC support, and gets brighter.

Acer Predator X25 bmiiprzx

The Acer Predator X25 bmiiprzx and the Dell Alienware AW2521H are both excellent gaming monitors geared towards competitive gamers. They both have 360Hz refresh rates and 25 inch 1080p screens, prioritizing motion clarity over resolution. In terms of performance, they are very similar. That said, the Dell has a slightly faster response time at the max 360Hz, although they're about even at 60Hz. If you're looking for a 360Hz monitor, you can't go wrong with either of these, and it may just be a matter of preference.

Dell Alienware AW2720HF

The Dell Alienware AW2521H is better than the Dell Alienware AW2720HF. The AW2521H has a much higher 360Hz refresh rate, it gets brighter, supports HDR, has a quicker response time at 60Hz, and has slightly lower input lag. However, the AW2720HF has better ergonomics and better reflection handling.

MSI Oculux NXG253R

The Dell Alienware AW2521H and the MSI Oculux NXG253R are extremely similar overall, but the Dell is slightly better overall. The Dell has a slightly faster response time, it's brighter, and the unit we bought has better accuracy out of the box, but this can vary between units. On the other hand, the MSI has a wider swivel range.

Acer Predator XB273U GXbmiipruzx

The Dell Alienware AW2521H and the Acer Predator XB273U GXbmiipruzx are very different gaming monitors. The Dell is a 25 inch 1080p monitor with a 360Hz refresh rate, aimed at competitive gamers who want the best possible motion clarity. Meanwhile, the Acer is a 27 inch 1440p monitor, so you get a bit of a sharper image and a little more screen space to work with. It still has a high 270Hz refresh rate, however, and both have incredible response times. The Acer also has a wider color gamut in SDR and HDR.

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