Alienware AW2521H Review

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The Dell Alienware AW2521 has a 1ms response time, a 300Hz refresh rate, and excellent image clarity, but its limited HDR support, poor black levels, and low contrast ratio might dissuade others from purchasing it.


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Table of Contents

Product Snapshot


The Dell Alienware AW2521H is a mid-tier gaming monitor that was released in early 2021. It delivers stunning image quality thanks to its high pixel-per-inch ratio and boasts fantastic color accuracy, making it reliable enough for at-home photo editing. The display’s incredible 360 Hz refresh rate makes it more than ideal for competitive gamers, as they will be able to enjoy a tear-free gaming experience. The refresh rate is way higher than that of the Alienware AW2521HF, and its rapid response time plus Ultra Low Motion Blur technology ensures that motion blur is eliminated. Make sure to complete this Dell Alienware AW2521H review to see what else the display has in store and find out whether it will match up to the best-rated computer monitors on the market.

Rankings (recommended in)

Best For

  • 1080p


our Verdict

The Dell Alienware AW2521H gaming monitor is a great choice for competitive gamers. It has a fast response time, a high refresh rate, and G-Sync compatibility. But if you’re looking for a monitor for dark room viewing, this one isn’t for you – it has a low contrast ratio and poor black levels. The stand has RGB lighting and is adjustable for your comfort.

ReasonS to Buy

  • Extremely high refresh rate
  • Ultra Low Motion Blur technology for exceptional responsiveness
  • Great viewing angles
  • Ergonomic stand
  • Good reflection handling

Reason to Avoid

  • Poor black levels
  • Low contrast levels
  • No local dimming feature
  • No FreeSync

Alienware AW2521H Specs

Display TypeLED
HDMI Inputs2
HDR FormatYes
Max Resolution1920 x 1080 (Full HD)
Panel TypePanel TypeIPS
Refresh Rate360 Hz
Response TimeResponse Time1 ms
Screen size25"
Sync TechnologySync TechnologyG-Sync

All Specs

Test Results

Brightness (nits)432.4433
Contrast Ratio (as ratio, x:1)1,113.2
Color Gamut/Accuracy % (DCI P3 xy)81.3
Color Gamut/Accuracy % (DCI P3 uv)0
Color Gamut % (Adobe RGB Coverage xy)73
Color Gamut % (sRGB Coverage xy)105.5433
Color Gamut % (Rec. 2020 Coverage xy)58.3
Color Gamut % (Rec. 709 Coverage xy)0
Input Lag (ms)13.7
Response Time (ms)3.65
Reflections % (Total Reflections)5.8
Horizontal Viewing Angle (Washout Left)35
Horizontal Viewing Angle (Washout Right)37
Vertical Viewing Angle (Washout Above)29
Vertical Viewing Angle (Washout Below)28

All Tests

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