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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Style
    2. Accelerated Longevity Test
    3. Build Quality
    4. Ergonomics
    5. Stand
    6. Display
    7. Controls
    8. In The Box
    9. Back
    10. Borders
    11. Thickness
  5. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Brightness
    4. HDR Brightness
    5. Horizontal Viewing Angle
    6. Vertical Viewing Angle
    7. Gray Uniformity
    8. Black Uniformity
    9. Color Accuracy (Pre-Calibration)
    10. Color Accuracy (Post-Calibration)
    11. SDR Color Gamut
    12. SDR Color Volume
    13. HDR Color Gamut
    14. HDR Color Volume
    15. Image Retention
    16. Reflections
    17. Text Clarity
    18. Gradient
    19. Color Bleed
  6. Motion
    1. Refresh Rate
    2. Variable Refresh Rate (VRR)
    3. Response Time @ Max Refresh Rate
    4. Response Time @ 120Hz
    5. Response Time @ 60Hz
    6. Backlight Strobing (BFI)
    7. Image Flicker
  7. Inputs
    1. Input Lag
    2. Resolution And Size
    3. PS5 Compatibility
    4. Xbox Series X|S Compatibility
    5. Inputs Photos
    6. Video And Audio Ports
    7. USB
    8. macOS Compatibility
  8. Features
    1. Additional Features
    2. On-Screen Display (OSD)
    3. Controls
    4. In The Box
  9. Comments

Dell Alienware AW3821DW vs Dell UltraSharp U4021QW

Side-by-Side Comparison

Products

Dell Alienware AW3821DW
Dell UltraSharp U4021QW

Tested using Methodology v1.2

Updated Mar 06, 2024 09:26 PM

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Tested using Methodology v1.1

Updated May 03, 2024 05:02 PM

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Dell Alienware AW3821DW Picture
Dell UltraSharp U4021QW Picture

Variants

  • AW3821DW (38")
  • UltraSharp U4021QW (40")

Our Verdict

Dell Alienware AW3821DW

Dell UltraSharp U4021QW

The Dell Alienware AW3821DW and the Dell UltraSharp U4021QW are both great for their intended purposes, with different advantages and disadvantages. They're both ultrawide monitors from Dell, but the Alienware is intended for gaming while the UltraSharp is meant for productivity. The Alienware has a high refresh rate, faster response times, and VRR support, while the UltraSharp offers a higher resolution, exceptional text clarity, and wider viewing angles.

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40"
UltraSharp U4021QW
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40"
UltraSharp U4021QW
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40"
UltraSharp U4021QW
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40"
UltraSharp U4021QW
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40"
UltraSharp U4021QW
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Notice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our monitors test methodology.

Main Differences for

Threshold 

0.10

Mixed Usage 

7.7
7.5

Text Clarity 
 

7.5
9.5

Resolution And Size 
 

8.6
9.4

SDR Brightness 
 

8.4
7.1

HDR Color Gamut 
 

8.8
0.0

HDR Color Volume 
 

8.7
0.0

Full Comparison

Design

Style 
 

Design Picture  

Dell Alienware AW3821DW Design Picture
Dell UltraSharp U4021QW Design Picture

Curved 
 

Yes
Yes

Curve Radius 
 

2300R
2500R

Size  

38"
40"

Weight (without stand) 
 

17.6 lbs (8.0 kg)
20.9 lbs (9.5 kg)

Weight (with stand) 
 

25.4 lbs (11.5 kg)
30.4 lbs (13.8 kg)

Show text

Accelerated Longevity Test 
 

Uniformity Pictures  

Longevity Graph  

Build Quality 
 

8.5
7.0

Build Quality Picture  

Dell Alienware AW3821DW Build Quality Picture
Dell UltraSharp U4021QW Build Quality Picture

Show text

Ergonomics 
 

7.5
6.4

Ergonomics Picture  

Dell Alienware AW3821DW Ergonomics Picture
Dell UltraSharp U4021QW Ergonomics Picture

Back Picture  

Dell Alienware AW3821DW Back Picture
Dell UltraSharp U4021QW Back Picture

Height Adjustment 
 

5.1" (13.0 cm)
4.7" (12.0 cm)

Tilt Range 
 

-21° to 5°
-20° to 5°

Rotate Portrait/Landscape 
 

No
No

Swivel Range 
 

-20° to 20°
-35° to 35°

Wall Mount 
 

VESA 100x100
VESA 100x100

Show text

Stand 
 

Stand Picture  

Dell Alienware AW3821DW Stand Picture
Dell UltraSharp U4021QW Stand Picture

Thickness Picture  

Dell Alienware AW3821DW Thickness Picture
Dell UltraSharp U4021QW Thickness Picture

Base Width 
 

23.6" (60.0 cm)
15.2" (38.5 cm)

Base Depth 
 

11.8" (30.0 cm)
9.7" (24.7 cm)

Thickness (With Display) 
 

11.2" (28.5 cm)
8.3" (21.1 cm)

Weight (With Display) 
 

25.4 lbs (11.5 kg)
30.4 lbs (13.8 kg)

Show text

Display 
 

Display Picture  

Dell Alienware AW3821DW Display Picture

Size 
 

38"
40"

Housing Width 
 

35.2" (89.5 cm)

Housing Height 
 

15.6" (39.5 cm)

Thickness (Without Stand) 
 

5.1" (13.0 cm)
4.0" (10.1 cm)

Weight (Without Stand) 
 

17.6 lbs (8.0 kg)
20.9 lbs (9.5 kg)

Borders Size (Bezels)  
 

0.4" (1.1 cm)
0.4" (1.1 cm)

Controls 
 

Controls Picture  

Dell Alienware AW3821DW Controls Picture
Dell UltraSharp U4021QW Controls Picture

Show text

In The Box 
 

In The Box Picture  

Dell Alienware AW3821DW In The Box Picture
Dell UltraSharp U4021QW In The Box Picture

Power Supply 
 

Internal
Internal

Show text

Back  

Back Picture  

Dell Alienware AW3821DW Back Picture
Dell UltraSharp U4021QW Back Picture

Wall Mount  

VESA 100x100
VESA 100x100

Show text

Borders  

Borders Picture  

Dell UltraSharp U4021QW Borders Picture

Borders 
 

0.4" (1.1 cm)
0.4" (1.1 cm)

Thickness  

Thickness Picture  

Dell Alienware AW3821DW Thickness Picture
Dell UltraSharp U4021QW Thickness Picture

Thickness (with stand) 
 

11.2" (28.5 cm)
8.3" (21.1 cm)

Thickness (without stand) 
 

5.1" (13.0 cm)
4.0" (10.1 cm)

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Picture Quality

Contrast 
 

5.8
5.9

Checkerboard Picture  

Dell Alienware AW3821DW Checkerboard Picture
Dell UltraSharp U4021QW Checkerboard Picture

Native Contrast 
 

883 : 1
943 : 1

Contrast With Local Dimming 
 

870 : 1
N/A

Show text

Local Dimming 
 

2.5
0.0

Local Dimming Video  

Local Dimming 
 

Yes
No

Backlight 
 

Edge
Edge

Show text

SDR Brightness 
 

8.4
7.1

Real Scene 
 

479 cd/m²
256 cd/m²

Peak 2% Window 
 

483 cd/m²
279 cd/m²

Peak 10% Window 
 

492 cd/m²
279 cd/m²

Peak 25% Window 
 

494 cd/m²
280 cd/m²

Peak 50% Window 
 

495 cd/m²
280 cd/m²

Peak 100% Window 
 

495 cd/m²
280 cd/m²

Sustained 2% Window 
 

483 cd/m²
278 cd/m²

Sustained 10% Window 
 

492 cd/m²
279 cd/m²

Sustained 25% Window 
 

493 cd/m²
279 cd/m²

Sustained 50% Window 
 

495 cd/m²
279 cd/m²

Sustained 100% Window 
 

495 cd/m²
280 cd/m²

Automatic Brightness Limiting (ABL) 
 

0.001
0.000

Minimum Brightness 
 

35 cd/m²

Show text

HDR Brightness 
 

7.3
0.0

EOTF  

Dell Alienware AW3821DW EOTF

VESA DisplayHDR Certification 
 

DisplayHDR 600

Real Scene 
 

496 cd/m²
N/A

Peak 2% Window 
 

591 cd/m²
N/A

Peak 10% Window 
 

660 cd/m²
N/A

Peak 25% Window 
 

663 cd/m²
N/A

Peak 50% Window 
 

549 cd/m²
N/A

Peak 100% Window 
 

481 cd/m²
N/A

Sustained 2% Window 
 

476 cd/m²
N/A

Sustained 10% Window 
 

528 cd/m²
N/A

Sustained 25% Window 
 

536 cd/m²
N/A

Sustained 50% Window 
 

535 cd/m²
N/A

Sustained 100% Window 
 

468 cd/m²
N/A

Automatic Brightness Limiting (ABL) 
 

0.010
N/A

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Horizontal Viewing Angle 
 

7.0
8.0

Horizontal Viewing Angle Video  

Horizontal Chroma Graph  

Dell Alienware AW3821DW Horizontal Chroma Graph
Dell UltraSharp U4021QW Horizontal Chroma Graph

Color Washout From Left 
 

41°
43°

Color Washout From Right 
 

41°
45°

Horizontal Hue Graph  

Dell Alienware AW3821DW Horizontal Hue Graph
Dell UltraSharp U4021QW Horizontal Hue Graph

Color Shift From Left 
 

54°
49°

Color Shift From Right 
 

55°
51°

Horizontal Lightness Graph  

Dell Alienware AW3821DW Horizontal Lightness Graph
Dell UltraSharp U4021QW Horizontal Lightness Graph

Brightness Loss From Left 
 

46°
49°

Brightness Loss From Right 
 

47°
51°

Black Level Raise From Left 
 

25°
70°

Black Level Raise From Right 
 

22°
70°

Gamma Shift From Left 
 

36°
40°

Gamma Shift From Right 
 

32°
41°

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Vertical Viewing Angle 
 

7.0
7.1

Vertical Viewing Angle Video  

Vertical Chroma Graph  

Dell Alienware AW3821DW Vertical Chroma Graph
Dell UltraSharp U4021QW Vertical Chroma Graph

Color Washout From Below 
 

34°
33°

Color Washout From Above 
 

30°
30°

Vertical Hue Graph  

Dell Alienware AW3821DW Vertical Hue Graph
Dell UltraSharp U4021QW Vertical Hue Graph

Color Shift From Below 
 

40°
38°

Color Shift From Above 
 

32°
33°

Vertical Lightness Graph  

Dell Alienware AW3821DW Vertical Lightness Graph
Dell UltraSharp U4021QW Vertical Lightness Graph

Brightness Loss From Below 
 

37°
36°

Brightness Loss From Above 
 

32°
32°

Black Level Raise From Below 
 

70°
70°

Black Level Raise From Above 
 

70°
70°

Gamma Shift From Below 
 

39°
43°

Gamma Shift From Above 
 

32°
36°

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Gray Uniformity 
 

8.2
8.5

50% Uniformity Picture  

Dell Alienware AW3821DW 50% Uniformity Picture
Dell UltraSharp U4021QW 50% Uniformity Picture

50% Std. Dev. 
 

2.402%
2.994%

50% DSE 
 

0.137%
0.122%

5% Uniformity Picture  

Dell UltraSharp U4021QW 5% Uniformity Picture

5% Std. Dev. 
 

0.398%

5% DSE 
 

0.032%

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Black Uniformity 
 

6.3
6.8

Native Black Uniformity Picture  

Dell Alienware AW3821DW Native Black Uniformity Picture
Dell UltraSharp U4021QW Native Black Uniformity Picture

Native Std. Dev. 
 

1.105%
1.434%

Black Uniformity Picture With Local Dimming  

Dell Alienware AW3821DW Black Uniformity Picture With Local Dimming
Dell UltraSharp U4021QW Black Uniformity Picture With Local Dimming

Std. Dev. w/ L.D. 
 

5.372%
N/A

Show text

Color Accuracy (Pre-Calibration) 
 

6.0
9.1

Pre Calibration Picture  

Dell Alienware AW3821DW Pre Calibration Picture
Dell UltraSharp U4021QW Pre Calibration Picture

Pre Gamma Curve Picture  

Dell Alienware AW3821DW Pre Gamma Curve Picture
Dell UltraSharp U4021QW Pre Gamma Curve Picture

Pre Color Picture  

Dell Alienware AW3821DW Pre Color Picture
Dell UltraSharp U4021QW Pre Color Picture

Picture Mode 
 

Standard
Color Space (sRGB)

sRGB Gamut Area xy 
 

133.0%

White Balance dE (Avg.) 
 

3.91
1.50

Color Temperature (Avg.) 
 

7,374 K
6,281 K

Gamma (Avg.) 
 

2.24
2.16

Color dE (Avg.) 
 

3.52
0.99

Contrast Setting 
 

75
75

RGB Settings 
 

100-100-100
Default

Gamma Setting 
 

No Gamma Setting
No Gamma Setting

Brightness Setting 
 

50
75

Measured Brightness 
 

222 cd/m²
210 cd/m²

Brightness Locked 
 

No

Show text

Color Accuracy (Post-Calibration) 
 

9.8
9.7

Post Calibration Picture  

Dell Alienware AW3821DW Post Calibration Picture
Dell UltraSharp U4021QW Post Calibration Picture

Post Gamma Curve Picture  

Dell Alienware AW3821DW Post Gamma Curve Picture
Dell UltraSharp U4021QW Post Gamma Curve Picture

Post Color Picture  

Dell Alienware AW3821DW Post Color Picture
Dell UltraSharp U4021QW Post Color Picture

Picture Mode 
 

Custom Color
Custom Color

sRGB Gamut Area xy 
 

99.9%

White Balance dE (Avg.) 
 

0.57
0.65

Color Temperature (Avg.) 
 

6,453 K
6,456 K

Gamma (Avg.) 
 

2.17
2.18

Color dE (Avg.) 
 

0.31
0.31

Contrast Setting 
 

75
75

RGB Settings 
 

100-91-84
98-97-100

Gamma Setting 
 

No Gamma Setting
No Gamma Setting

Brightness Setting 
 

18
28

Measured Brightness 
 

99 cd/m²
100 cd/m²

ICC Profile 
 

Show text

SDR Color Gamut 
 

9.5
9.4

sRGB Color Gamut Picture  

Dell Alienware AW3821DW sRGB Color Gamut Picture
Dell UltraSharp U4021QW sRGB Color Gamut Picture

sRGB Coverage xy 
 

99.7%
100.0%

sRGB Picture Mode 
 

Custom Color
Custom Color

Adobe RGB Color Gamut Picture  

Dell Alienware AW3821DW Adobe RGB Color Gamut Picture
Dell UltraSharp U4021QW Adobe RGB Color Gamut Picture

Adobe RGB Coverage xy 
 

86.6%
88.5%

Adobe RGB Picture Mode 
 

Custom Color
Custom Color

Show text

SDR Color Volume 
 

9.7
9.6

sRGB Color Volume ITP Picture  

Dell Alienware AW3821DW sRGB Color Volume ITP Picture
Dell UltraSharp U4021QW sRGB Color Volume ITP Picture

sRGB In ICtCp 
 

98.2%
98.2%

sRGB Picture Mode 
 

Custom Color
Custom Color

Adobe RGB Color Volume ITP Picture  

Dell Alienware AW3821DW Adobe RGB Color Volume ITP Picture
Dell UltraSharp U4021QW Adobe RGB Color Volume ITP Picture

Adobe RGB In ICtCp 
 

91.1%
93.2%

Adobe RGB Picture Mode 
 

Custom Color
Custom Color

Show text

HDR Color Gamut 
 

8.8
0.0

Wide Color Gamut 
 

Yes
N/A

DCI-P3 Color Gamut Picture  

Dell Alienware AW3821DW DCI-P3 Color Gamut Picture
Dell UltraSharp U4021QW DCI-P3 Color Gamut Picture

DCI-P3 Coverage xy 
 

95.6%

DCI-P3 Picture Mode 
 

Gamer 1
No HDR

Rec. 2020 Color Gamut Picture  

Dell Alienware AW3821DW Rec. 2020 Color Gamut Picture
Dell UltraSharp U4021QW Rec. 2020 Color Gamut Picture

Rec. 2020 Coverage xy 
 

70.4%
N/A

Rec. 2020 Picture Mode 
 

Gamer 1
No HDR

DCI P3 xy 
 

N/A

Show text

HDR Color Volume 
 

8.7
0.0

DCI-P3 Color Volume ITP Picture  

Dell Alienware AW3821DW DCI-P3 Color Volume ITP Picture
Dell UltraSharp U4021QW DCI-P3 Color Volume ITP Picture

DCI-P3 In ICtCp 
 

87.9%
N/A

DCI-P3 Picture Mode 
 

Gamer 1
No HDR

Rec. 2020 Color Volume ITP Picture  

Dell Alienware AW3821DW Rec. 2020 Color Volume ITP Picture
Dell UltraSharp U4021QW Rec. 2020 Color Volume ITP Picture

Rec. 2020 In ICtCp 
 

73.7%
N/A

Rec. 2020 Picture Mode 
 

Gamer 1
No HDR

Show text

Image Retention 
 

10

Image Retention Picture  

Dell UltraSharp U4021QW Image Retention Picture

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%

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Reflections 
 

6.5
6.7

Average Room  

Dell Alienware AW3821DW Average Room
Dell UltraSharp U4021QW Average Room

Average Room Off Picture  

Dell Alienware AW3821DW Average Room Off Picture
Dell UltraSharp U4021QW Average Room Off Picture

Bright Room Off Picture  

Dell Alienware AW3821DW Bright Room Off Picture
Dell UltraSharp U4021QW Bright Room Off Picture

Screen Finish 
 

Matte
Matte

Total Reflections 
 

6.8%
6.6%

Indirect Reflections 
 

3.2%
3.2%

Calculated Direct Reflections 
 

3.6%
3.4%

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Text Clarity 
 

7.5
9.5

ClearType On  

Dell Alienware AW3821DW ClearType On
Dell UltraSharp U4021QW ClearType On

ClearType Off  

Dell Alienware AW3821DW ClearType Off
Dell UltraSharp U4021QW ClearType Off

Pixel Type 
 

IPS
IPS

Pixels  

Dell Alienware AW3821DW Pixels
Dell UltraSharp U4021QW Pixels

Subpixel Layout 
 

RGB
RGB

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Gradient 
 

9.8
9.8

Gradient Picture  

Dell Alienware AW3821DW Gradient Picture
Dell UltraSharp U4021QW Gradient Picture

Color Depth 
 

10 Bit
10 Bit

Show text

Color Bleed 
 

10

Color Bleed Horizontal  

Dell UltraSharp U4021QW Color Bleed Horizontal

Pixel Row Error 
 

0.001%

Color Bleed Vertical  

Dell UltraSharp U4021QW Color Bleed Vertical

Pixel Column Error 
 

0.001%

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Motion

Refresh Rate 
 

8.3

Native Refresh Rate 
 

144 Hz
60 Hz

Max Refresh Rate 
 

144 Hz
60 Hz

Max Refresh Rate Over DP 
 

144 Hz

Max Refresh Rate Over HDMI 
 

85 Hz

Max Refresh Rate Over DP @ 10-bit 
 

120 Hz

Max Refresh Rate Over HDMI @ 10-Bit 
 

60 Hz

Show text

Variable Refresh Rate (VRR) 
 

FreeSync 
 

Compatible (Tested)
No

G-SYNC 
 

Yes (Native)
No

VRR Maximum 
 

144 Hz
N/A

VRR Minimum 
 

< 20 Hz
No VRR

VRR Supported Connectors 
 

DisplayPort, HDMI
No VRR

Variable Refresh Rate 
 

Yes
No VRR

Native 
 

144 Hz
60 Hz

Max Refresh Rate 
 

144 Hz
60 Hz

Variable Refresh Rate 
 

No

Show text

Response Time @ Max Refresh Rate 
 

8.1
7.2

Motion Blur Picture  

Dell Alienware AW3821DW Motion Blur Picture
Dell UltraSharp U4021QW Motion Blur Picture

Response Time Table  

Dell Alienware AW3821DW Response Time Table
Dell UltraSharp U4021QW Response Time Table

Recommended Overdrive Setting 
 

Fast
Normal

Rise / Fall Time 
 

2.8 ms
6.5 ms

Total Response Time 
 

10.8 ms
18.7 ms

Overshoot Error 
 

13.7%
7.5%

Worst 3 Rise / Fall Time 
 

3.4 ms
6.6 ms

Worst 3 Total Response Time 
 

14.5 ms
20.3 ms

Worst 3 Overshoot Error 
 

31.4%
12.5%

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Response Time @ 120Hz 
 

7.9

Motion Blur Picture  

Dell Alienware AW3821DW Motion Blur Picture

Response Time Table  

Dell Alienware AW3821DW Response Time Table

Recommended Overdrive Setting 
 

Fast

Rise / Fall Time 
 

2.9 ms

Total Response Time 
 

11.8 ms

Overshoot Error 
 

13.0%

Worst 3 Rise / Fall Time 
 

3.7 ms

Worst 3 Total Response Time 
 

16.1 ms

Worst 3 Overshoot Error 
 

30.0%

Show text

Response Time @ 60Hz 
 

7.5
7.2

Motion Blur Picture  

Dell Alienware AW3821DW Motion Blur Picture
Dell UltraSharp U4021QW Motion Blur Picture

Response Time Table  

Dell Alienware AW3821DW Response Time Table
Dell UltraSharp U4021QW Response Time Table

Recommended Overdrive Setting 
 

Fast
Normal

Rise / Fall Time 
 

3.9 ms
6.5 ms

Total Response Time 
 

16 ms
18.7 ms

Overshoot Error 
 

4.8%
7.5%

Worst 3 Rise / Fall Time 
 

5.6 ms
6.6 ms

Worst 3 Total Response Time 
 

22.7 ms
20.3 ms

Worst 3 Overshoot Error 
 

13.0%
12.5%

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Backlight Strobing (BFI) 
 

Backlight Strobing Picture  

Dell Alienware AW3821DW Backlight Strobing Picture
Dell UltraSharp U4021QW Backlight Strobing Picture

Backlight Strobing Frequency Picture  

Dell Alienware AW3821DW Backlight Strobing Frequency Picture
Dell UltraSharp U4021QW Backlight Strobing Frequency Picture

Backlight Strobing (BFI) 
 

No BFI
No BFI

Maximum Frequency 
 

N/A
N/A

Minimum Frequency 
 

N/A
N/A

Longest Pulse Width Brightness 
 

N/A

Shortest Pulse Width Brightness 
 

N/A

Pulse Width Control 
 

No BFI

Pulse Phase Control 
 

No BFI

Pulse Amplitude Control 
 

No BFI

VRR At The Same Time 
 

No BFI

Show text

Image Flicker 
 

10
10

Backlight Picture  

Dell Alienware AW3821DW Backlight Picture
Dell UltraSharp U4021QW Backlight Picture

Flicker-Free 
 

Yes
Yes

PWM Dimming Frequency 
 

0 Hz
0 Hz

Show text

Inputs

Input Lag 
 

8.9
9.0

Native Resolution @ Max Hz 
 

4.1 ms
8.9 ms

Native Resolution @ 120Hz 
 

4.7 ms

Native Resolution @ 60Hz 
 

12.0 ms
8.9 ms

Variable Refresh Rate 
 

N/A

Variable Refresh Rate @ 60Hz 
 

N/A

10 Bit HDR 
 

N/A

Backlight Strobing (BFI) 
 

N/A
N/A

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Resolution And Size 
 

8.6
9.4

Native Resolution 
 

3840 x 1600
5120 x 2160

Aspect Ratio 
 

21:9
21:9

Megapixels 
 

6.1 MP
11.1 MP

Pixel Density 
 

111 PPI
137 PPI

Measured Screen Diagonal 
 

37.5"
40.0"

Screen Area 
 

498 in²
581 in²

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PS5 Compatibility 
 

7.0

PS5 Compatibility Photo  

Dell Alienware AW3821DW PS5 Compatibility Photo

4k @ 120Hz 
 

No

4k @ 60Hz 
 

No

1440p @ 120Hz 
 

Yes

1440p @ 60Hz 
 

Yes

1080p @ 120Hz 
 

Yes

1080p @ 60Hz 
 

Yes

HDR 
 

Yes

VRR 
 

Yes

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Xbox Series X|S Compatibility 
 

5.8

XSX Compatibility Photo  

Dell Alienware AW3821DW XSX Compatibility Photo

4k @ 120Hz 
 

No

4k @ 60Hz 
 

No

1440p @ 120Hz 
 

Yes

1440p @ 60Hz 
 

Yes

1080p @ 120Hz 
 

Yes

1080p @ 60Hz 
 

Yes

HDR 
 

No

VRR 
 

Yes

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Inputs Photos  

Inputs 1  

Dell Alienware AW3821DW Inputs 1
Dell UltraSharp U4021QW Inputs 1

Inputs 2  

Dell Alienware AW3821DW Inputs 2
Dell UltraSharp U4021QW Inputs 2

Video And Audio Ports 
 

DisplayPort 
 

1 (DP 1.4)
1 (DP 1.4)

Mini DisplayPort 
 

No
No

HDMI 
 

2 (HDMI 2.0)
2 (HDMI 2.0)

HDMI 2.1 Rated Speed 
 

No HDMI 2.1

DVI 
 

No
No

VGA 
 

No
No

Daisy Chaining 
 

No

3.5mm Audio Out 
 

2
1

HDR10 
 

Yes
No

3.5mm Audio In 
 

No

3.5mm Microphone In 
 

No
No

DisplayPort Out  

No

USB  

4
4 (USB 3.0)

USB C  

0
2 (1x Thunderbolt 3, PD, DP Alt Mode, 1x USB 3.2 Gen 2)

Digital Optical Audio Out  

No

Analog Audio Out RCA  

No

Power Supply  

Internal
Internal

Show text

USB 
 

USB-A Ports 
 

4
4 (USB 3.0)

USB-A Rated Speed 
 

5Gbps (USB 3.2 Gen 1)

USB-B Upstream Port 
 

Yes

USB-C Ports 
 

0
2 (1x Thunderbolt 3, PD, DP Alt Mode, 1x USB 3.2 Gen 2)

USB-C Upstream 
 

No USB-C Ports

USB-C Rated Speed 
 

No USB-C Ports

USB-C Power Delivery 
 

No USB-C Ports

USB-C DisplayPort Alt Mode 
 

No USB-C Ports

Thunderbolt 
 

No

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macOS Compatibility 
 

macOS Screenshot  

Dell Alienware AW3821DW macOS Screenshot

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Features

Additional Features 
 

Speakers 
 

No
Yes

RGB Illumination 
 

Controllable
No

Multiple Input Display 
 

No
PIP + PBP

KVM Switch 
 

No

HDR10  

Yes
No

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On-Screen Display (OSD) 
 

OSD Picture  

Dell Alienware AW3821DW OSD Picture
Dell UltraSharp U4021QW OSD Picture

Controls  

Controls Picture  

Dell Alienware AW3821DW Controls Picture
Dell UltraSharp U4021QW Controls Picture

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In The Box  

In The Box Picture  

Dell Alienware AW3821DW In The Box Picture
Dell UltraSharp U4021QW In The Box Picture

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40"
UltraSharp U4021QW
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UltraSharp U4021QW
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40"
UltraSharp U4021QW
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40"
UltraSharp U4021QW
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Dell Alienware AW3821DW

Dell UltraSharp U4021QW

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Dell Alienware AW3821DW vs Dell UltraSharp U4021QW: Main Discussion

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