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Dell Alienware AW2521H vs Dell Alienware AW2721D

Product A: Dell

Alienware AW2521H

106 of 172 known
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Compare the Dell Alienware AW2721D with

Product B: Dell

Alienware AW2721D

118 of 172 known
Change Dell Alienware AW2721D

Compare the Dell Alienware AW2521H with

68 of 164 fields differ

Download CSVDownload JSON
  • 45 different values
  • 23 known for one only
  • 49 the same
  • 47 missing for both

Biggest differences

Each bar uses the scale of all 179 monitors.

  1. Power use SDR (EU label)Lower is betterA: 19.1WB: 31WAlienware AW2521H is 11.9 W lower.
  2. Refresh rateA: 360HzB: 240HzAlienware AW2521H is 120 Hz higher.
  3. Standby powerLower is betterA: 0.4WB: 0.3WAlienware AW2721D is 0.1 W lower.
  4. Pixel densityA: 89.9ppiB: 108.8ppiAlienware AW2721D is 18.9 ppi higher.
  5. Power use HDR (EU label)Lower is betterA: 18.3WB: 21.7WAlienware AW2521H is 3.4 W lower.
  6. Power use (max)Lower is betterA: 83WB: 95WAlienware AW2521H is 12 W lower.
  7. Brightness (typical, SDR)A: 400nitsB: 450nitsAlienware AW2721D is 50 nits higher.

Refresh rate per resolution

The best rate over any port. Bars run from 0 to 1200 Hz.

2560 × 1440Native for B
ANot listed
B240Hz
1920 × 1080Native for A
A360Hz
BNot listed

Size, drawn to scale

Front and side. Solid lines show the stand at its lowest. Dashed lines show it at its highest.

Weight

0 to 15 kg

Weight with stand
A8.1kg
B10.9kg
Weight without stand
A4.5kg
B6.3kg
Box weight
A12.3kg
B15.5kg

All 172 fields

Every value links to where we found it.

ADell Alienware AW2521H
BDell Alienware AW2721D

General

5 of 8 differ
Series
Alienware1Maker product pagedell.com/en-us/shop/alienware-25-gaming-monitor-aw2521h/apd/210-aycbRead 5 October 2026
Alienware1Maker product pagedell.com/en-us/shop/alienware-27-gaming-monitor-aw2721d/apd/210-axsw/monitors-monitor-accessoriesRead 7 October 2026
Model numbers
AW2521H, AW2521Hb1Maker product pagedell.com/en-us/shop/alienware-25-gaming-monitor-aw2521h/apd/210-aycbRead 5 October 2026Exact marketing and regulatory models independently read on own original guide cover.2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own exact cover marketing/regulatory model names, not inferred from a sibling suffix.
AW2721D, AW2721Db, 210-AXSW, NHR9Y, 210-AXNU, P3VP11Maker product pagedell.com/en-us/shop/alienware-27-gaming-monitor-aw2721d/apd/210-axsw/monitors-monitor-accessoriesRead 7 October 2026Exact US archive identifies manufacturer part NHR9Y, Dell part 210-AXSW, order aw2721dsap. Exact Irish archive separately identifies P3VP1/210-AXNU. Marketing AW2721D and regulatory AW2721Db preserved. Regional order references not different panel models.2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own exact cover marketing/regulatory model names, not inferred from a sibling suffix.12Maker product pagedell.com/en-ie/shop/alienware-27-gaming-monitor-aw2721d/apd/210-axnu/monitors-monitor-accessoriesRead 7 October 2026Exact archived Irish offer manufacturer P3VP1 / Dell 210-AXNU / marketed AW2721D. US reference separately 210-AXSW/NHR9Y.
GTIN / EAN
8841163833697Retailer pagegamestop.com/pc-gaming/monitors/pc/products/alienware-aw2521h-25-in-fhd-1920x1080-360hz-1ms-g-sync-compatible-gaming-monitor/311805.htmlRead 7 October 2026Exact AW2521H new US retail reference. European EAN 5397184409541 not asserted for the US package. Refurbished Best Buy GSRF code 400064571209 excluded.
539718420085811Retailer pagemultitronic.fi/en/products/3457550Read 7 October 2026Exact EU Dell 210-AXNU AW2721D retail listing EAN5397184200858. Mapped only to European regional row, not US210-AXSW. Clove exact model independently lists same barcode.
Announced
13 May 20205Press articleengadget.com/alienware-area-51-m15-m17-aurora-140007085.htmlRead 7 October 2026Original exact model preview on May 13, 2020. First public announcement, distinct from October pricing and November retail. Maker original May blog not recovered. May 18 TFTCentral article is later coverage.
Not available
Status
Not available
Discontinued6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/fichesRead 7 October 2026Official fiche states model placed on Union market from 26 November 2020 to 26 November 2024. Exact current US/Irish maker pages say currently unavailable and redirect buyers to alternatives, while RTINGS explicitly names AW2723DF replacement. Discontinued model status refers to confirmed end of new EU placement and current maker availability. No worldwide factory-closure date or absence of remaining retail stock claimed.
Predecessor
Not available
Not available
Successor
Not available
Dell Alienware AW2723DF20Reviewrtings.com/monitor/reviews/dell/alienware-aw2723dfRead 23 October 2026RTINGS says the Alienware AW2723DF replaces the Alienware AW2721D.
Launch price (US)
$899.994Press articlenotebookcheck.net/Alienware-announces-pricing-and-availability-for-its-new-gaming-monitors.497409.0.htmlRead 7 October 2026Original October 8, 2020 maker launch-price announcement reported by Notebookcheck. Exact 24.5-inch 360 Hz AW2521H. Independent same-day Tom’s Hardware launch report agrees. Subsequent sale prices excluded. Original maker page no longer exposes launch price.
$1,099.9910Press articlenotebookcheck.net/Alienware-announces-pricing-and-availability-for-its-new-gaming-monitors.497409.0.htmlRead 7 October 2026October 8, 2020 report explicitly attributes new pricing confirmation to Alienware, lists AW2721D 27 Gaming Monitor at US$1099.99 for November US launch. Independent same-day Tom’s Hardware report agrees 1099.99. Official US list reference, not later 749.99 maker archive price or 825/800 discounts. No price conversion or unproved euro/VAT price.
Launch price (EU)
Not available
Not available
Markets
US, EU, AU, JP, CN4Press articlenotebookcheck.net/Alienware-announces-pricing-and-availability-for-its-new-gaming-monitors.497409.0.htmlRead 7 October 2026Original launch availability explicitly names these markets for November 2020. This records markets in which model was sold, not present stock. Japan actual maker release was December 2, 2020, later than the forecast. China already independently verified in original release source. Exact shared AW2521H model, not an AW2521HF regional SKU. China October 2020 availability also explicitly stated in same launch report.
US, AT, BE, BG, HR, CY, CZ, DK, EE, FI, FR, DE, GR, HU, IS, IE, IT, LV, LI, LT, LU, MT, NL, NO, PL, PT, RO, SK, SI, ES, SE8EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625Read 7 October 2026Exact AW2721D record lists historical EU/EEA markets, with EL mapped to GR and XI excluded. US maker offer proves US. This base union does not bind a single regional order code to every listed country. The 210-AXNU row retains only directly proved IE and FI.
Colours
Dark Side of the Moon6Maker product pagedell.com/en-uk/shop/alienware-25-gaming-monitor-aw2521h/apd/210-ayclRead 7 October 2026Exact AW2521H maker colour. Lunar Light belongs to AW2521HFL 240 Hz, not this model. Matching global panel and housing reference, UK cable/warranty not transplanted.
Lunar Light5Maker spec sheet (PDF)items-attachments.s1.citilink.ru/1454227/5fe19e7d5f472.pdfRead 7 October 2026Technical Specs printed 13, Color Options: Lunar Light. This is maker marketing colour, not an invented separate Black/White pair from mixed chassis finishes.
Segment
Gaming1Maker product pagedell.com/en-us/shop/alienware-25-gaming-monitor-aw2521h/apd/210-aycbRead 5 October 2026
Gaming1Maker product pagedell.com/en-us/shop/alienware-27-gaming-monitor-aw2721d/apd/210-axsw/monitors-monitor-accessoriesRead 7 October 2026

Display

6 of 12 differ
Screen size
24.5in(62.2 cm)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
27in(68.6 cm)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Viewable screen diagonal
24.5in(62.2 cm)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
27in(68.6 cm)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Native resolution
1920 × 1080px2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
2560 × 1440px2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Aspect ratio
16:92Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
16:92Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Pixel density
89.9ppi
108.8ppi
Pixel pitch
0.2829mm2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own horizontal pitch 0.2829 mm. Separate vertical pitch 0.2802 mm is not put into this scalar. Active dimensions and pixel count agree at published precision.
0.2331mm2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Active display area
Width543.2Height302.6mm(21.4 × 11.9 in)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Width596.7Height335.7mm(23.5 × 13.2 in)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Curved
No8Retailer pagenewegg.com/black-dell-alienware-aw2521h-24-5/p/0JC-0004-00SV8Read 7 October 2026Exact AW2521H 360 Hz retailer table explicitly Flat Panel. No curvature radius zero inferred.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact published spec chart Format Flat, independently Tech Spot flat panel and RTINGS exact-model public variant row Curved No.
Curvature radius
Not available
Not available
Screen surface
Matte10Reviewpcmonitors.info/dell/dell-alienware-aw2521h-360hz-full-hd-ips-modelRead 7 October 2026Exact AW2521H descriptive source, consistent with maker anti-glare 3H. No named coating replacement.
Matte9Reviewrtings.com/monitor/reviews/dell/alienware-aw2721dRead 7 October 2026Public changelog August 11, 2025 changed Screen Finish from Semi-Gloss to Matte to reflect coating interaction with light. Exact panel anti-glare maker claim and TFT light-AG description agree. Old semi-gloss classification preserved as changed reviewer taxonomy, not hardware revision.
Anti-reflection coating
Anti-glare with 3H hardness2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Anti-glare with 3H hardness2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Touchscreen
No9Retailer pagesenetic.co.uk/product/GAME-AW2521HRead 7 October 2026Exact GAME-AW2521H retailer table. Other template values conflicting with maker not adopted.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact published feature chart Touch Screen crossed No. Maker input/control inventory independently matches ordinary non-touch screen. Bottom touch-sensor lighting control is not a touchscreen digitizer.

Panel

18 of 31 differ
Panel type
Fast IPS2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
IPS2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Panel type (as published)
Fast IPS2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
IPS2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Backlight
Edge-lit LED2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Edge-lit LED2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Local dimming
No11Reviewrtings.com/monitor/reviews/dell/alienware-aw2521hRead 7 October 2026Own tested exact AW2521H public HDR verdict explicitly has no local dimming. Maker Variable Backlight changes whole backlight intensity. It is dynamic/global backlight control, not independent local zones. DisplayNinja independently agrees. No zone count zero inferred.
Yes5Maker spec sheet (PDF)items-attachments.s1.citilink.ru/1454227/5fe19e7d5f472.pdfRead 7 October 2026Feature Overview printed 4 explicitly localized dimming for VESA Display HDR 600. Dedicated backlight zones, not global contrast or assumed certification alone. User guide calls it Variable Backlight.
Dimming zones
Not available
3213Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026HDR tests identify 32 vertical edge-lit zones, qualified as far as reviewer can tell. Tech Spot independently explicitly 32 edge-lit zones. Not a FALD LED count or 32 x 32 matrix.
Panel maker
AU Optronics10Reviewpcmonitors.info/dell/dell-alienware-aw2521h-360hz-full-hd-ips-modelRead 7 October 2026Exact AW2521H supplier explicitly named. AHVA is IPS-like AUO technology, not VA. Exact part number and panel generation not published.
LG Display13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Panel chart and Gaming paragraph explicitly LG.Display. Exact AW2721D review sample, not inferred from generic IPS.
Panel part number
Not available
LM270WQB13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Panel chart and Gaming explicitly LM270WQB. No unproved suffix is appended. Supplier or firmware revisions may vary.
Panel generation
Not available
Not available
Subpixel layout
Not available
Not available
Colour depth
8bits10Reviewpcmonitors.info/dell/dell-alienware-aw2521h-360hz-full-hd-ips-modelRead 7 October 2026Exact native panel statement. Supported high-bit input is not native 10-bit. DisplaySpecifications independently says 8 bits with FRC No. Epey 6-bit+FRC row is inconsistent with these specialist sources and appears template contamination.
10bits13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Panel table explicitly 8-bit+FRC, supporting 10-bits/channel under schema definition. Not native 10-bit or inferred solely from 1.07 billion colours.
Colour depth method
Native10Reviewpcmonitors.info/dell/dell-alienware-aw2521h-360hz-full-hd-ips-modelRead 7 October 2026Same explicit true 8-bit panel claim. Does not derive bits from 16.7 million displayed colours.
FRC13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Explicit 8-bit+FRC implementation in exact panel/spec charts, not native 10-bit.
Displayable colours
16.7 million2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
1.07 billion2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
sRGB coverage
99%2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own 99% sRGB claim. CIE basis is unstated.
Not available
DCI-P3 coverage
Not available
98%2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own DCI-P3 98% claim, CIE reference unstated. The separate 131.3% sRGB extent is not a coverage value.
Adobe RGB coverage
Not available
Not available
Rec. 2020 coverage
Not available
Not available
NTSC coverage
Not available
Not available
Factory calibrated
Yes15Reviewdisplayninja.com/dell-alienware-aw2521h-reviewRead 7 October 2026Exact descriptive calibration claim. Maker existing calibration accuracy target is ΔE2000 <1.5 average. Review measurement can vary and remains separate. No paper report claim inferred.
Not available
Claimed Delta E
1.52Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own average Delta E 2000 < 1.5 alongside sRGB 99% colour claim. Preset and detailed test conditions are unstated. This maker calibration target is not a reviewed colour-error result.
Not available
Paper calibration report in box
Not available
No16Owner's manualgzhls.at/blob/ldb/b/3/1/9/6ecc6446b95ec028fa31e65fad57c3ef8484.pdfRead 7 October 2026Complete maker Package Contents printed 7–8 lists display, stand parts, I/O cover, cables, quick guide, SERI, Alienware welcome card, without a physical calibration report. Closed box inventory, not inference from absent factory-calibration marketing. Documentation media differences in October reviewer guide are not a paper calibration report.
Hardware calibration support
Not available
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact feature chart Hardware Calibration No. ICC/profile changes operate at graphics card, not writing an internal monitor LUT.
Static contrast ratio
1,000:12Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
1,000:12Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Brightness (typical, SDR)
400nits2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
450nits2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Brightness (maker minimum)
Not available
Not available
Peak brightness (HDR)
Not available
600nits2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own maker HDR peak 600 nits. Window, duration and mode are unstated.
HDR peak test window
Not available
Not available
Full-screen brightness
Not available
Not available
HDR formats
HDR102Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
HDR1013Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026HDR section explicitly screen accepts HDR10 input. No HLG/Dolby Vision/Plus inferred from generic HDR 600 certification.
HDR certification
Not available
DisplayHDR 6002Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Viewing angle (horizontal)
178°2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
178°2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Viewing angle (vertical)
178°2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
178°2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026

Refresh rate and motion

11 of 22 differ
Refresh rate per resolution and port
ADell Alienware AW2521H
Refresh rate per resolution and port. The top rate is in bold.
ResolutionHDMI 2.0DisplayPort 1.4
1920 × 1080Native240Hz360Hz
Source2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own Resolution Specifications explicitly maximum native resolution at the stated DP and HDMI rates. Bit depth, chroma, DSC and lower-resolution maxima are unproved and omitted.
BDell Alienware AW2721D
Refresh rate per resolution and port. The top rate is in bold.
ResolutionHDMI 2.0DisplayPort 1.4
2560 × 1440Native144Hz240Hz8-bit, 4:4:4
Source2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Maker Resolution Specifications state native 2560 x 1440 maximum DP 240 Hz and HDMI 144 Hz. Exact TFT test independently adds DP 8-bit RGB 4:4:4 at 240 Hz and 10-bit RGB 4:4:4 maximum 144 Hz. HDMI bit-depth, chroma and DSC remain unknown.13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact tested DisplayPort table: native maximum 240 Hz 8-bit Full RGB, and maximum 144 Hz 10-bit Full RGB at 2560 x 1440. Full RGB corresponds 4:4:4. New separate 10-bit maximum row, not an ordinary timing extrapolation. Existing HDMI 144 Hz maker row preserved without unproved bit-depth/chroma. DSC remains unstated. GPU RTX 3090. Firmware unknown.
Max refresh rate
360Hz
240Hz
Max refresh rate at native resolution
360Hz
240Hz
Max refresh rate over DisplayPort
360Hz
240Hz
Max refresh rate over HDMI
240Hz
144Hz
Max refresh rate over USB-C
Not available
Not available
Max refresh rate at 10-bit
Not available
144Hz
Native refresh rate
360Hz2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
240Hz2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Overclocked refresh rate
Not available
Not available
Dual mode
Not available
Not available
Minimum fixed refresh rate
Not available
Not available
Adaptive sync technologies
G-SYNC2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own Product Features names the native NVIDIA tier. Generic scan intervals are not actual VRR ranges, and AMD compatibility or certification is not borrowed from similar models.
G-SYNC Ultimate2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own Product Features names the native NVIDIA tier. Generic scan intervals are not actual VRR ranges, and AMD compatibility or certification is not borrowed from similar models.
VRR range per port
ADell Alienware AW2521H
Not available
BDell Alienware AW2721D
InputMin (Hz)Max (Hz)
DisplayPort1240
Source13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Refresh section explicitly 1–240 Hz supported thanks to native G-SYNC module, discussed with DisplayPort VRR. Nvidia path, firmware version unstated. Low frame duplication can provide effective low rates. Not claimed physical panel native 1 Hz. No HDMI lower bound copied from scan range.
Low framerate compensation
Not available
Not available
Response time (maker GtG claim)
1ms2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own fastest maker GtG 1 ms in Extreme, with potential visible artifacts. Super Fast 2 ms and Fast 3 ms are separate settings.
1ms2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own fastest maker GtG 1 ms in Extreme, with potential visible artifacts. Super Fast 2 ms and Fast 3 ms are separate settings.
Response time (maker MPRT claim)
Not available
Not available
Overdrive settings
Fast, Super Fast, Extreme2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Fast, Super Fast, Extreme2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Motion blur reduction
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own NVIDIA ULMB paragraph supports only direct DisplayPort at fixed 144 or 240 Hz, not through a dongle/hub. It is not the normal 360 Hz operating mode.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Dedicated blur-reduction mode explicitly absent in both feature chart and Gaming text. High refresh and fast response do not imply strobing.
Blur-reduction technology
NVIDIA ULMB2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Not available
Blur reduction works with VRR
No2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own NVIDIA ULMB paragraph expressly requires Enable G-SYNC not selected in NVIDIA Control Panel.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact feature chart Blur Reduction+VRR No, alongside absent dedicated blur-reduction mode. Not a statement that ordinary VRR is unsupported.
Flicker-free (claimed)
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Yes2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Black frame insertion
Not available
Not available

Measured

5 of 12 differ
Input lag at maximum refresh rate
Not available
Not available
Input lag at 60 Hz
Not available
Not available
Average response time (measured)
Not available
3.6ms14Measurementtftcentral.co.uk/images/dell_alienware_aw2721d/gaming.pngRead 7 October 2026Full 30-transition 0/50/100/150/200/255 table mean G2G 3.6 ms, native 2560 x 1440 at 240 Hz, Fast overdrive, RTX 3090. ETC M526/photosensor, traditional 10–90% optical brightness endpoints. Smaller initial subset 4.2 ms is not full mean. No gamma-corrected metric or best 0.8 ms Extreme substituted. Firmware unknown.15Measurementtftcentral.co.uk/articles/response_timeRead 7 October 2026Published January 2013 method linked by exact February 2021 review: ETC M526 plus photosensor, 10% starting / 90% target optical brightness endpoints. Actual AW2721D full chart has 30 transitions, although old generic article describes 20. No invented gamma correction.
Overshoot (measured)
Not available
2.4%14Measurementtftcentral.co.uk/images/dell_alienware_aw2721d/gaming.pngRead 7 October 2026Same full 30-transition Fast 240 Hz table Average overshoot error 2.4%. Optical overshoot amplitude as percentage of requested brightness change, averaged across transitions. This is neither worst 20.4% nor percentage of transitions with more than 15% error. Source graph uses incorrect (ms) heading in summary, but table title and published method explicitly percent. Firmware unknown.15Measurementtftcentral.co.uk/articles/response_timeRead 7 October 2026Same dated linked method defines overshoot as fraction of requested optical brightness change and averages its percentage across tested transitions. Unknown firmware kept unknown.
Contrast ratio (measured)
890.4:118Measurementtomshardware.com/reviews/alienware-aw2521h-360hz-monitor/2Read 7 October 2026Own exact AW2521H review uncalibrated maximum-backlight static white/black ratio, Custom Color mode per page 3 methodology, Variable Backlight off. Separate approximately 1300:1 dynamic and 918.9:1 ANSI excluded. Linked methodology full-field white/black patterns and ratio. LaptopMedia 1040:1 in Standard mode is a different picture condition, not silent replacement.
976:118Measurementtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact default Standard 50% brightness state: 226 cd/m2 white/0.23 black, published 976:1, no ICC, ambient sensor/local dimming off. X-Rite i1Pro 2/LaCie Blue Eye Pro with i1Display Pro Plus black verification. Brightness-sweep average 997 and calibrated 939 are different conditions, not substituted. Firmware unknown.
SDR brightness (measured)
440nits17Measurementlaptopmedia.com/review/alienware-aw2521hRead 7 October 2026Own AW2521H June 20, 2022 lab review: maximum white luminance at screen centre in Standard SDR mode. NVIDIA RTX 2060 display connection. Test-window percentage and meter model not named in public prose, not fabricated. Tom’s Hardware Custom Color sample just over 460 and Quasar 464.1 under different/unstated settings are not interchangeable maker replacements.
502nits18Measurementtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Coherent exact TFT sample maximum SDR 502 cd/m2 at brightness 100%, standard default controls, ambient sensor/local dimming off, GPU ICC/gamma corrections disabled. Small white sample, area percentage unstated. X-Rite i1Display Pro Plus with basICColor method. Firmware unpublished. Tech Spot separate sample/run maximum 532 nits preserved externally, not blended or treated as universal contradiction.
HDR brightness in a real scene (measured)
Not available
Not available
PWM flicker frequency (measured)
Not available
Not available
VRR range (measured)
Not available
Not available
Colour accuracy (measured Delta E)
2.433419Measurementtomshardware.com/reviews/alienware-aw2521h-360hz-monitor/3Read 7 October 2026Exact own AW2521H uncalibrated first colour chart explicitly reads Color Gamut - Standard, default and Avg dE2000 2.4334, with CIE1976 u′v′ geometry and sRGB reference. Specific chart identifies Standard/default, while generic prose says testing and calibration in Custom Color. This mode-label discrepancy is retained, not silently resolved. Out-of-box state is independently explicit in the adjacent text. Post-calibration 1.50 and grayscale 3.11 excluded.
Not available
Gray uniformity (measured)
Not available
Not available
Reflections (measured)
Not available
Not available

Connectivity

2 of 19 differ
Video inputs
ADell Alienware AW2521H
TypeVersionCount
DisplayPort1.41
HDMI2.02
Source2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
BDell Alienware AW2721D
TypeVersionCount
DisplayPort1.41
HDMI2.02
Source2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
HDMI ports
2
2
DisplayPort ports
1
1
Highest HDMI version
2.0
2.0
Highest DisplayPort version
1.4
1.4
HDMI features
Not available
Not available
USB-C video (DP Alt Mode)
No2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own complete physical inventory has no USB-C socket.
No2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own complete physical inventory has no USB-C socket.
USB-C power delivered
Not available
Not available
Thunderbolt
Not available
Not available
USB upstream ports
ADell Alienware AW2521H
ConnectorUSB versionCount
USB-B3.2 Gen 11
Source2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
BDell Alienware AW2721D
ConnectorUSB versionCount
USB-B3.2 Gen 11
Source2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
USB downstream hub ports
ADell Alienware AW2521H
ConnectorUSB versionCount
USB-A3.2 Gen 14
Source2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own total four peripheral Type-A sockets, including one charging socket. Charging and Reflex functions do not add sockets.
BDell Alienware AW2721D
ConnectorUSB versionCount
USB-A3.2 Gen 14
Source2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own total four peripheral Type-A sockets, including one charging socket. The charging function does not add another socket.
KVM switch
Not available
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Exact feature chart KVM switch No. One USB-B host upstream hub is not a KVM.
Daisy chain (MST)
Not available
No16Owner's manualgzhls.at/blob/ldb/b/3/1/9/6ecc6446b95ec028fa31e65fad57c3ef8484.pdfRead 7 October 2026Complete physical connector tables/views show only HDMI and DP video inputs, one host USB-B upstream and peripheral USB-A ports. No video output/MST connector. This bounded inventory establishes no built-in video daisy-chain arrangement, not exclusion of external splitters.
Ethernet
No2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own complete physical inventory has no Ethernet socket.
No2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own complete physical inventory has no Ethernet socket.
3.5 mm headphone output
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own headphone port is separate from rear line-out, which explicitly does not support headphones.
Yes2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own headphone port is separate from rear line-out, which explicitly does not support headphones.
3.5 mm microphone input
No2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own complete physical inventory has analog output sockets only, with no microphone input.
No2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own complete physical inventory has analog output sockets only, with no microphone input.
Optical out
No2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own complete physical inventory has no optical audio socket.
No2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own complete physical inventory has no optical audio socket.
Picture in picture
No13Revieweftm.com/2021/03/review-alienware-aw2521h-gaming-monitor-207972/ampRead 7 October 2026Own exact AW2521H hands-on explicitly no multi-input PIP/PBP support. Consistent with complete maker OSD feature inventory.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Movies table PiP/PbP Neither supported, feature chart No.
Picture by picture
No13Revieweftm.com/2021/03/review-alienware-aw2521h-gaming-monitor-207972/ampRead 7 October 2026Same explicit sentence. Resolution switching does not mean simultaneous sources.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Same explicit Neither supported statement, not generic gaming-monitor omission.

Smart features

None of 4 known
Smart platform
Not available
Not available
Wi-Fi
Not available
Not available
Bluetooth
Not available
Not available
Remote control
Not available
Not available

Audio and camera

1 of 5 differ
Speakers
No12Reviewtomshardware.com/reviews/alienware-aw2521h-360hz-monitorRead 7 October 2026Exact 360 Hz AW2521H table and physical review state no internal speakers. No speaker count or per-channel power zero stored.
No13Reviewtftcentral.co.uk/reviews/dell_alienware_aw2721dRead 7 October 2026Movies table explicitly No integrated speakers. Existing headphone/line-out ports are external outputs. No fabricated zero-driver rows.
Number of speakers
Not available
Not available
Speaker power per channel
Not available
Not available
Webcam
Not available
No11Retailer pagemultitronic.fi/en/products/3457550Read 7 October 2026Exact AW2721D/210-AXNU multimedia table explicitly Built-in camera No. Primary complete front/back/bottom inventory contains ambient sensor and display controls, no camera. Clove same actual model agrees. No external webcam accessory is inherited.
Microphone
Not available
Not available

Ergonomics and controls

2 of 15 differ
Stand height adjustment
130mm2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
130mm2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Tilt
Forward5°Backward21°2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Forward5°Backward21°2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Swivel
Left20°Right20°2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Left20°Right20°2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Pivot
Counterclockwise90°Clockwise90°2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Counterclockwise90°Clockwise90°2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Removable stand
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Yes2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
VESA mount
100 x 1002Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
100 x 1002Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
VESA adapter needed
No14Owner's manualm.media-amazon.com/images/I/C1BEKAl2z0L.pdfRead 7 October 2026Maker VESA wall mounting page 36: remove stand and four plastic-cover screws, then directly attach compatible wall mounting bracket with specified M4 screws. No proprietary adapter required. Optional wall bracket is separate from adapter.
No16Owner's manualgzhls.at/blob/ldb/b/3/1/9/6ecc6446b95ec028fa31e65fad57c3ef8484.pdfRead 7 October 2026Authentic exact AW2721D/AW2721Db maker guide printed 38 complete VESA procedure: remove plastic cover four screws, attach standard wall mounting bracket with M4 x 10 mm bolts. No separate VESA adapter needed. External mounting bracket itself is not an adapter.
Security lock slot
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Yes2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
On-screen menu controls
Joystick, Buttons2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Joystick, Buttons2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Desktop software
Alienware Command Center (AWCC)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own AWCC/AlienFX section controls LED lighting effects. It does not establish software control of the display OSD.
Alienware Command Center (AWCC)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own AWCC/Alien FX section controls LED lighting effects. It does not establish software control of the display OSD.
User firmware updates
Not available
No17Maker product pagedell.com/community/en/conversations/alienware-desktops/aw2721d-firmware-update/647f99acf4ccf8a8ded1a907Read 7 October 2026Exact maker Community Manager answer January 15, 2022 says user firmware update not possible and no public update/tool exists. Current exact model driver search locates INF driver VP801/A00-00, described as supplying configuration to OS, despite generic File Format Firmware Images label. It is not a hardware updater. EPREL 8-year software/firmware availability undertaking does not document public user updater. Factory M0B102/M0B103 units do not imply user flash support.19Maker product pagedell.com/support/home/en-uk/drivers/driversdetailsRead 7 October 2026Current exact VP801/A00-00 listing is a monitor INF driver that supplies configuration to the operating system, not a monitor firmware updater. It does not contradict Dell Community Manager’s explicit 2022 denial of public user firmware updates. Factory revisions and regulatory minimum software availability do not establish a user update route.
Ambient light sensor
Yes14Owner's manualm.media-amazon.com/images/I/C1BEKAl2z0L.pdfRead 7 October 2026Maker-authored AW2521H/AW2521Hb 2022 user guide. OSD page 52 explicitly says the ambient light sensor automatically adjusts backlight brightness, default Off and disabled for HDR. Physical presence is separately named by the maker reviewer sheet. Dell-hosted PDF routes were unavailable, and this public authentic guide mirror was downloaded and read independently.
Yes5Maker spec sheet (PDF)items-attachments.s1.citilink.ru/1454227/5fe19e7d5f472.pdfRead 7 October 2026Feature Overview printed 5 and Technical Specs printed 13 explicitly Ambient Light Sensor Yes, detects ambient light and adjusts brightness. User-guide top view independently identifies physical sensor. EPREL ABC No is regulatory availability, not proof sensor absent.
Presence sensor
Not available
Not available
RGB lighting
Yes2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own AlienFX section explicitly supports RGB colour codes and effects across physical lighting zones.
Yes2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own Alien FX section explicitly supports RGB colour codes and effects across physical lighting zones.
Gaming menu features
Timer, Frame Rate, Display Alignment, Dark Stabilizer, NVIDIA Reflex Latency Analyzer2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own Reflex Latency Analyzer is a system-latency feature, not a monitor-only measured-lag value.
Timer, Frame Rate, Display Alignment, Dark Stabilizer2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026

OLED care

None of 3 known
OLED care
Not available
Not available
Burn-in covered by warranty
Not available
Not available
Burn-in warranty length
Not available
Not available

Dimensions and weight

6 of 7 differ
Dimensions with stand
Width556.3Height (lowest)421.2Height (highest)526.1Depth251.9mm(21.9 × 16.6 to 20.7 × 9.9 in)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own complete display width/depth are direct. Height endpoints come from the maker guide mirror listed below, which labels the overall envelope separately from the 130 mm panel travel.14Owner's manualm.media-amazon.com/images/I/C1BEKAl2z0L.pdfRead 7 October 2026Maker guide page 19 explicitly labels overall with-stand height: extended 526.1 mm, compressed 421.2 mm. Separate stand-only heights are 436.8/421.2 mm, and panel travel is separately 130 mm. Main approved literal overall endpoints without forcing their difference to equal panel travel.
Width607.7Height (lowest)443.1Height (highest)555.3Depth251.9mm(23.9 × 17.4 to 21.9 × 9.9 in)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Original maker guide supplies 607.7 mm width and 251.9 mm depth. October 2020 maker Reviewer’s Guide independently supplies overall compressed 443.1 mm and extended 555.3 mm heights. These are overall envelopes, distinct from 130 mm panel travel.5Maker spec sheet (PDF)items-attachments.s1.citilink.ru/1454227/5fe19e7d5f472.pdfRead 7 October 2026Printed 7 dimension illustration explicitly height with stand 443.1 mm min–555.3 mm max, and Technical Specs printed 13 compressed/extended same endpoints. Complete overall stand/display envelope, not panel travel. Guide stand-riser minimum 443.1 mm can protrude above lowered panel, so endpoint difference 112.2 mm does not replace separately published 130 mm panel adjustment. Width/depth unchanged.
Dimensions without stand
Width556.3Height328.2Depth84.4mm(21.9 × 12.9 × 3.3 in)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Width607.7Height356Depth82.4mm(23.9 × 14 × 3.2 in)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Stand footprint
Width465.2Depth251.9mm(18.3 × 9.9 in)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own physical table stand width 465.2 mm and depth 251.9 mm, separate from panel-body width.
Width465.2Depth251.9mm(18.3 × 9.9 in)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own physical table stand width 465.2 mm and depth 251.9 mm, separate from panel-body width.
Weight with stand
8.1kg(17.9 lb)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own weight with stand assembly and cables.
10.9kg(24 lb)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own weight with stand assembly and cables.
Weight without stand
4.5kg(9.9 lb)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own no-stand/no-cable weight for VESA considerations.
6.3kg(13.9 lb)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own no-stand/no-cable weight for VESA considerations.
Box dimensions
Not available
Width259.1Height524Depth741.9mm(10.2 × 20.6 × 29.2 in)11Retailer pagemultitronic.fi/en/products/3457550Read 7 October 2026Named packaging rows: Package width 259.1 mm, height 524 mm, depth 741.9 mm, packaged weight 15.5kg. These published box axes are preserved literally, not sorted by size or substituted for upright screen dimensions. Flat-packed box orientation. Clove same named rows agree. Regional EU retail packaging reference.
Box weight
12.3kg(27.1 lb)2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own packaged weight.
15.5kg(34.2 lb)2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own packaged weight.

Power

10 of 13 differ
Power supply
Internal2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
Internal2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Adapter rating
Not available
Not available
Input voltage
100-240 V AC, 50/60 Hz2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
100-240 V AC, 50/60 Hz2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Power use (typical)
21.232W2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own Pon uses the Energy Star reference method. Separate EU on-mode value is not substituted for this claim.
22.69W2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own Pon uses the Energy Star reference method. Separate EU on-mode value is not substituted for this claim.
Power use (max)
83W2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own maximum brightness/contrast with maximum loading on all USB ports.
95W2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own maximum brightness/contrast with maximum loading on all USB ports.
Power use SDR (EU label)
19.1W2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own electrical on-mode value as defined in EU 2019/2021 and 2019/2013, separate from Energy Star Pon.
31W2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own electrical on-mode value as defined in EU 2019/2021 and 2019/2013, separate from Energy Star Pon.
Power use HDR (EU label)
18.3W21EU energy label (EPREL)eprel.ec.europa.eu/api/product/364442/fichesRead 7 October 2026Exact AW2521H EU fiche row 6. EU label HDR on-mode test power, not US typical or peak consumption. Same model identifier and SDR 19.1, standby 0.4/off 0.3 agree original/current maker guide. No EU warranty or support term added.
21.7W6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/fichesRead 7 October 2026Official fiche parameter 6: HDR on-mode power demand 21.7 W. SDR parameter 4 is 31.0 W. HDR demand can be below SDR under different regulatory content tests. This exact unrounded demand is distinct from 22 kWh/1000h label. Not HDR peak instantaneous consumption.
Standby power
0.4W2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
0.3W2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
Off-mode power
0.3W2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026
0.2W2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026
EU energy class SDR
E21EU energy label (EPREL)eprel.ec.europa.eu/api/product/364442/fichesRead 7 October 2026Exact AW2521H EU2019/2013 energy classification under EU registration364442. Regional regulatory test scope.
G6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/fichesRead 7 October 2026Official fiche parameter 3: SDR class G. Current maker IE table agrees.
EU energy class HDR
E21EU energy label (EPREL)eprel.ec.europa.eu/api/product/364442/fichesRead 7 October 2026Exact AW2521H EU2019/2013 HDR classification. No automatic conversion from power.
F6EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/fichesRead 7 October 2026Official fiche parameter 5: HDR class F. Current maker IE table agrees.
Energy per 1000 h SDR
19kWh22EU energy label (EPREL)eprel.ec.europa.eu/api/product/364442/labelsRead 7 October 2026Original exact AW2521H EU energy label, upper SDR value 19 kWh per 1000 h, class E. Public label downloaded, extracted and visually checked. Not calculated from 19.1 W fiche.
31kWh7EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/labelsRead 7 October 2026Official generated energy-label download is ZIP containing Label_352625.pdf/png/svg. Exact AW2721D label says 31 kWh/1000h SDR, class G. Read actual PDF and extracted text, not annual 72.25 kWh.
Energy per 1000 h HDR
18kWh22EU energy label (EPREL)eprel.ec.europa.eu/api/product/364442/labelsRead 7 October 2026Original exact AW2521H EU energy label lower HDR value 18 kWh per 1000 h, class E. Not calculated from 18.3 W fiche. Regional regulatory test scope, no EU warranty/support terms.
22kWh7EU energy label (EPREL)eprel.ec.europa.eu/api/products/electronicdisplays/352625/labelsRead 7 October 2026Same exact official label says 22 kWh/1000h HDR, class F. Rounded label figure retained, separate from precise 21.7 W Product Information Sheet demand.

Certifications

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VESA ClearMR
Not available
Not available
VESA AdaptiveSync Display
Not available
Not available
TÜV certifications
Not available
Not available
Low blue light
Software2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own ComfortView preset reduces blue emission through software setting. No unproved hardware-solution certification is inferred.
Software2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own Comfort View preset reduces blue emission through software setting. No unproved hardware-solution certification is inferred.
ENERGY STAR
Not available
Not available
TCO Certified
Not available
Not available
EPEAT
Not available
Not available
Colour certifications
Not available
Not available
Other certifications
Not available
Not available

In the box

1 of 2 differ
In the box
Display, Stand riser, Stand base, I/O cover, Power cable (varies by country), DisplayPort to DisplayPort cable, Mini DisplayPort to DisplayPort cable, USB 3.2 Gen 1 upstream cable, Quick setup guide, Safety, Environmental and Regulatory Information, Alienware welcome card2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own exact Package Contents. Optional market items and power cable can vary. HDMI cable is not listed and electrical cable description explicitly says not included.
Display, Stand riser, Stand base, I/O cover, Power cable (varies by country), DisplayPort to DisplayPort cable, Mini DisplayPort to DisplayPort cable, USB 3.2 Gen 1 upstream cable, Quick setup guide, Safety, Environmental and Regulatory Information, Alienware welcome card2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own exact Package Contents. Optional market items and power cable can vary. HDMI cable is not listed and electrical cable description explicitly says not included.
Cables included
ADell Alienware AW2521H
TypeCount
Power cable1
DisplayPort to DisplayPort cable1
Mini DisplayPort to DisplayPort cable1
USB 3.2 Gen 1 upstream cable1
Source2Owner's manualdl.dell.com/manuals/all-products/esuprt_electronics_accessories/esuprt_electronics_accessories_monitors/dell-aw2521h-monitor_user%27s-guide_en-us.pdfRead 5 October 2026Own package table pictures/lists one each. Lengths are preserved only where this exact guide states them.
BDell Alienware AW2721D
TypeCount
Power cable1
DisplayPort to DisplayPort cable (1.8 m)1
Mini DisplayPort to DisplayPort cable (1.8 m)1
USB 3.2 Gen 1 upstream cable (1.8 m)1
Source2Owner's manualdl.dell.com/content/manual1862413-alienware-aw2721d-monitor-user-s-guide.pdfRead 5 October 2026Own package table pictures/lists one each. Lengths are preserved only where this exact guide states them.

Warranty

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Manufacturer warranty (source market)
3years1Maker product pagedell.com/en-us/shop/alienware-25-gaming-monitor-aw2521h/apd/210-aycbRead 5 October 2026Exact US maker limited hardware warranty 3 years, with region-specific service terms.
3years1Maker product pagedell.com/en-us/shop/alienware-27-gaming-monitor-aw2721d/apd/210-axsw/monitors-monitor-accessoriesRead 7 October 2026Exact US maker limited hardware warranty 3 years, with region-specific service terms.
Dead pixel policy
Premium Panel Exchange: zero bright pixels/subpixels. Up to 5 dark subpixels and up to 5 combined defects allowed.16Maker product pagedell.com/support/kbdoc/en-us/000126004/dell-display-pixel-guidelinesRead 7 October 2026Exact current Dell US premium-panel table covers all Alienware except listed newer exceptions, none AW2521H. Exact original AW2521H reviewer sheet independently bundles Premium Panel Exchange with 3-year Advanced Exchange Service. Defect thresholds apply during warranty. Partial subpixel anomalies excluded under policy. Bright pixels and dark subpixels distinguished.
Premium Panel Exchange: free panel replacement during the limited hardware warranty even if one bright pixel is found.5Maker spec sheet (PDF)items-attachments.s1.citilink.ru/1454227/5fe19e7d5f472.pdfRead 7 October 2026Printed 6 explicitly Premium Panel Exchange permits free panel replacement within Limited Hardware Warranty even if one bright pixel is found. US maker shop separately includes three-year Premium Panel Guarantee. No unproved dark-subpixel threshold or image-retention coverage is added.

Both are also in the API. Back to all monitors.