Comparison between:
- 39.7" Dell U4021QW
- 37.5" Dell AW3821DW
- 31.5" Dell UP3221Q
- 34.14" Dell U3421WE

Brand, series, model

Information about the brand, series, model and model aliases.

Dell U4021QWDell AW3821DWDell UP3221QDell U3421WE
Series--UltraSharpUltraSharp
Dell U4021QWDell AW3821DWDell UP3221QDell U3421WE
Model alias--UltraSharp UP3219QUltraSharp U3421WE
Model year2021202020202020

Display

Information about the main characteristics of the display - panel, backlight, resolution, refresh rate, etc.

Size class39.7 in37.5 in31.5 in34.14 in
Diagonal-952.5 mm
95.25 cm
37.5 in
3.125 ft
800.1 mm
80.01 cm
31.5 in
2.625 ft
867.2 mm
86.72 cm
34.1417 in
2.8451 ft
Width-879.67 mm
87.967 cm
34.6327 in
2.8861 ft
697.31 mm
69.731 cm
27.4531 in
2.2878 ft
799.8 mm
79.98 cm
31.4882 in
2.624 ft
Height-366.53 mm
36.653 cm
14.4303 in
1.2025 ft
392.23 mm
39.223 cm
15.4421 in
1.2868 ft
334.8 mm
33.48 cm
13.1811 in
1.0984 ft
Radius of curvature2500 mm
250 cm
98.4252 in
8.2021 ft
2300 mm
230 cm
90.5512 in
7.5459 ft
-1900 mm
190 cm
74.8031 in
6.2336 ft
Panel manufacturer-LG Display-LG Display
Panel typeIPSIPSIPSAH-IPS
Panel bit depth10 bits10 bits10 bits10 bits
FRC--No-
Colors1073741824 colors
30 bits
1073741824 colors
30 bits
1073741824 colors
30 bits
1073741824 colors
30 bits
Aspect ratio2.37:12.4:11.778:1
16:9
2.389:1
Resolution5120 x 2160 pixels3840 x 1600 pixels3840 x 2160 pixels
Ultra HD (UHD) / 4K / 2160p
3440 x 1440 pixels
Pixel pitch-0.229 mm
0.0229 cm
0.009 in
0.0008 ft
0.182 mm
0.0182 cm
0.0071 in
0.0006 ft
0.233 mm
0.0233 cm
0.0092 in
0.0008 ft
Pixel density-111 ppi
43 ppcm
140 ppi
55 ppcm
109 ppi
43 ppcm
Display area-90.21 %--
BacklightW-LEDW-LEDMini LEDW-LED
sRGB100 %130.6 %-99 %
Adobe RGB (1998)--93 %-
DCI P398 %95 %99.8 %95 %
Rec. 2020--83 %-
Brightness300 cd/m²450 cd/m²350 cd/m²300 cd/m²
Peak brightness-600 cd/m²1000 cd/m²-
Static contrast1000 : 11000 : 11300 : 11000 : 1
Dynamic contrast--1000000 : 1-
HDR-DisplayHDR 600DisplayHDR 1000
HLG (Hybrid Log Gamma)
-
Horizontal viewing angle178 °178 °178 °178 °
Vertical viewing angle178 °178 °178 °178 °
Minimum response time5 ms
0.0050 s
1 ms
0.0010 s
6 ms
0.0060 s
5 ms
0.0050 s
Average response time8 ms
0.0080 s
3 ms
0.0030 s
8 ms
0.0080 s
8 ms
0.0080 s
Maximum response time--14 ms
0.0140 s
-
CoatingAnti-glare/Matte (3H)Anti-glare/Matte (3H)Anti-glare/Matte (3H)Anti-glare/Matte (3H)
--Local dimming zones - 2000-

3D

3D displays use various technologies to achieve a 3D effect. Each of these technologies has its own advantages and drawbacks.

3DNoNoNoNo

Frequencies

Information about the horizontal and vertical refresh rates/frequencies.

Horizontal frequency (digital)-30 kHz - 246 kHz--
Vertical frequency (digital)60 Hz24 Hz - 144 Hz60 Hz60 Hz
-DisplayPort - 246 kHz - 246 kHz; 1 Hz - 144 Hz
HDMI - 30 kHz - 141 kHz; 24 Hz - 120 Hz
--

Power supply and consumption

Information about the power supply and consumption, energy efficiency class, etc.

110V100 V - 120 V100 V - 120 V100 V - 120 V100 V - 120 V
220V220 V - 240 V220 V - 240 V220 V - 240 V220 V - 240 V
Alternating current frequency50 Hz - 60 Hz50 Hz - 60 Hz50 Hz - 60 Hz50 Hz - 60 Hz
Electric current (A)3 A3 A4.5 A3 A
Power consumption (off)-0.2 W0.3 W0.5 W
Power consumption (sleep)0.5 W0.3 W0.5 W0.5 W
Power consumption (average)51.5 W46.35 W70 W36 W
Power consumption (maximum)240 W125 W380 W210 W
Power consumption (annual)-144.04 kWh--

Dimensions, weight and color

Information about the dimensions and the weight of the specific model with and without stand as well as the colors, in which it is offered to the market.

Width946.6 mm
94.66 cm
37.2677 in
3.1056 ft
894.9 mm
89.49 cm
35.2323 in
2.936 ft
712.5 mm
71.25 cm
28.0512 in
2.3376 ft
813.3 mm
81.33 cm
32.0197 in
2.6683 ft
Height-399.4 mm
39.94 cm
15.7244 in
1.3104 ft
--
Depth-130.1 mm
13.01 cm
5.122 in
0.4268 ft
--
Weight-7.9 kg
17.42 lbs
11.31 kg
24.93 lbs
7.52 kg
16.58 lbs
Width with stand946.6 mm
94.66 cm
37.2677 in
3.1056 ft
894.9 mm
89.49 cm
35.2323 in
2.936 ft
712.5 mm
71.25 cm
28.0512 in
2.3376 ft
813.3 mm
81.33 cm
32.0197 in
2.6683 ft
Height with stand457.8 mm
45.78 cm
18.0236 in
1.502 ft
449.7 mm
44.97 cm
17.7047 in
1.4754 ft
463.7 mm
46.37 cm
18.2559 in
1.5213 ft
392.8 mm
39.28 cm
15.4646 in
1.2887 ft
Depth with stand248 mm
24.8 cm
9.7638 in
0.8136 ft
293.5 mm
29.35 cm
11.5551 in
0.9629 ft
250 mm
25 cm
9.8425 in
0.8202 ft
237.4 mm
23.74 cm
9.3465 in
0.7789 ft
Weight with stand9.5 kg
20.94 lbs
12.1 kg
26.68 lbs
18.07 kg
39.84 lbs
11.87 kg
26.17 lbs
Box weight-19.3 kg
42.55 lbs
24.33 kg
53.64 lbs
16.62 kg
36.64 lbs
ColorsBlackBlackBlackPlatinum Silver

Ergonomics

Information about the ergonomic functions - height adjustment, swivel angles, tilt angles, etc.

VESA mountYesYesYesYes
VESA interface100 x 100 mm100 x 100 mm100 x 100 mm100 x 100 mm
Removable standYesYesYesYes
Height adjustmentYesYesYesYes
Height adjustment range120 mm
12 cm
4.7244 in
0.3937 ft
130 mm
13 cm
5.1181 in
0.4265 ft
160 mm
16 cm
6.2992 in
0.5249 ft
150 mm
15 cm
5.9055 in
0.4921 ft
Landscape/portrait pivotNoNoYesNo
Left pivot--90 °-
Right pivot--90 °-
Left/right swivelYesYesYesYes
Left swivel30 °20 °30 °30 °
Right swivel30 °20 °30 °30 °
Forward/backward tiltYesYesYesYes
Forward tilt5 °5 °5 °5 °
Backward tilt21 °21 °21 °21 °
-Stand width - 599.6 mm--

Audio

Information about the audio system - number and power of the built-in speakers, supported audio technologies.

Speakers2 x 9 W--2 x 5 W

Camera

Many contemporary desktop monitors and smart TV sets have built-in cameras.

CameraNoNoNoNo

Connectivity

Available connectivity ports, slots and interfaces.

Connectivity4 x USB 3.2 (Type-A; Gen 1; downstream)
1 x USB 3.2 (Type-B; Gen 1; upstream)
1 x USB 3.2 (Type-C; downstream; 15W)
1 x Ethernet RJ45 (Gigabit)
2 x HDMI 2.0
1 x DisplayPort 1.4
1 x Thunderbolt 3.0 (Type-C; upstream; 90W; DP Alt Mode)
1 x 3.5 mm Audio Out (line-out for speakers)
4 x USB 3.2 (Type-A; Gen 1; downstream)
1 x USB 3.2 (Type-B; Gen 1; upstream)
2 x HDMI 2.0
1 x DisplayPort 1.4
1 x 3.5 mm Audio Out (line-out for speakers)
1 x 3.5 mm Audio Out (headphones)
1 x USB (Type-A; external colorimeter)
1 x USB 3.2 (Type-A; Gen 1; downstream; 5 Gbps)
1 x USB 3.2 (Type-A; Gen 2; downstream; 10 Gbps)
2 x HDMI 2.0
1 x DisplayPort 1.4
1 x Thunderbolt 3.0 (ownstream; 15W)
1 x Thunderbolt 3.0 (upstream; 90W; DP Alt Mode)
1 x 3.5 mm Audio Out
1 x USB 3.1 (Type-C; upstream; 90W; DP Alt Mode)
1 x USB 3.1 (Type-C; downstream; 15W)
4 x USB 3.2 (Type-A; Gen 1; downstream; 5 Gbps)
1 x USB 3.2 (Type-B; Gen 1; upstream)
1 x Ethernet RJ45
2 x HDMI 2.0
1 x DisplayPort 1.4
1 x 3.5 mm Audio Out
High-bandwidth Digital Content Protection (HDCP) 2.2High-bandwidth Digital Content Protection (HDCP)High-bandwidth Digital Content Protection (HDCP) 2.2High-bandwidth Digital Content Protection (HDCP)

Features

Some additional functional features of the model.

FeaturesComfortView Plus
Flicker-free technology
KVM Switch
Low Blue Light
Picture-by-Picture
Picture-in-Picture
AlienFX Lighting
Ambient Light Sensor
ComfortView
Flicker-free technology
Low Blue Light
Nano IPS
NVIDIA G-Sync Ultimate Certified
Picture-by-Picture
Picture-in-Picture
CalMAN Powered built-in colorimeter
DDC/CI
Flicker-free technology
Picture-by-Picture
Picture-in-Picture
ComfortView
Flicker-free technology
KVM Switch
Low Blue Light
Picture-by-Picture
Picture-in-Picture

Certificates, standards and licenses

Licenses from regulatory agencies, standards, certificates.

Certificates, standards and licenses-CECP
CEL
ENERGY STAR
RoHS Compliant
TCO Certified Displays
TUV Rheonland Eye Safety Certified
RoHSEnergy Star
EPEAT Gold
RoHS
TCO Certified Displays
TUV Rheinland Flicker Free Certified
TUV Rheinland Low Blue Light Certified

Operating and storage conditions

There are certain requirements for the environmental conditions, in which the display should be used and stored in order to function properly.

Operating temperature0 °C - 40 °C
32 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
Operating humidity10 % - 80 %10 % - 80 %10 % - 80 %10 % - 80 %
Operating altitude5000 m
16404.2 ft
5000 m
16404.2 ft
5000 m
16404.2 ft
5000 m
16404.2 ft
Storage temperature-20 °C - 60 °C
-4 °F - 140 °F
-20 °C - 60 °C
-4 °F - 140 °F
-20 °C - 60 °C
-4 °F - 140 °F
-20 °C - 60 °C
-4 °F - 140 °F
Storage humidity5 % - 90 %5 % - 90 %5 % - 90 %5 % - 90 %
Storage altitude12192 m
40000 ft
12192 m
40000 ft
12192 m
40000 ft
12192 m
40000 ft

Accessories

Often the packaging of desktop monitors and smart TV sets includes accessories for them.

AccessoriesDisplayPort cable
HDMI cable
Thunderbolt 4 (USB-C) Active Cable
USB Type-A to Type-B cable
DisplayPort cable
HDMI cable
Mini-DisplayPort to DisplayPort Cable
USB Type-B 3.2 Gen 1 cable
DisplayPort cable
HDMI cable
Monitor Hood
Thunderbolt 3 (USB Type-C) cable
USB Type-C to Type-A cable
DisplayPort cable
HDMI cable
USB Type-A to Type-B cable
USB Type-C to Type-C cable

Additional features

Information about other features.

Additional featuresSecurity lock slotSecurity lock slotSecurity lock slotSecurity lock slot
 Dell U4021QWDell AW3821DWDell UP3221QDell U3421WE