Comparison between:
- 37.5" Dell AW3821DW
- 34" Samsung C34F791
- 39.7" Dell U4021QW

Brand, series, model

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

Dell AW3821DWSamsung C34F791Dell U4021QW
Dell AW3821DWSamsung C34F791Dell U4021QW
Model alias-LC34F791WQUXEN-
Model year202020162021

Display

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

Size class37.5 in34 in39.7 in
Diagonal952.5 mm
95.25 cm
37.5 in
3.125 ft
863.6 mm
86.36 cm
34 in
2.8333 ft
-
Width879.67 mm
87.967 cm
34.6327 in
2.8861 ft
799.8 mm
79.98 cm
31.4882 in
2.624 ft
-
Height366.53 mm
36.653 cm
14.4303 in
1.2025 ft
334.8 mm
33.48 cm
13.1811 in
1.0984 ft
-
Radius of curvature2300 mm
230 cm
90.5512 in
7.5459 ft
1500 mm
150 cm
59.0551 in
4.9213 ft
2500 mm
250 cm
98.4252 in
8.2021 ft
Panel manufacturerLG DisplaySamsung-
Panel model-LTM340YP04-
Panel typeIPSSVAIPS
Panel bit depth10 bits8 bits10 bits
FRC-No-
Colors1073741824 colors
30 bits
16777216 colors
24 bits
1073741824 colors
30 bits
Aspect ratio2.4:12.389:12.37:1
Resolution3840 x 1600 pixels3440 x 1440 pixels5120 x 2160 pixels
Pixel pitch0.229 mm
0.0229 cm
0.009 in
0.0008 ft
0.233 mm
0.0233 cm
0.0092 in
0.0008 ft
0.182 mm
0.0182 cm
0.0071 in
0.0006 ft
Pixel density111 ppi
43 ppcm
109 ppi
43 ppcm
-
Display area90.21 %91.27 %-
BacklightW-LEDDirect LEDW-LED
sRGB130.6 %125 %100 %
Adobe RGB (1998)-92 %-
NTSC (1953)-88 %-
DCI P395 %92 %98 %
Brightness450 cd/m²300 cd/m²300 cd/m²
Peak brightness600 cd/m²--
Static contrast1000 : 13000 : 11000 : 1
Dynamic contrast-100000000 : 1-
HDRDisplayHDR 600--
Horizontal viewing angle178 °178 °178 °
Vertical viewing angle178 °178 °178 °
Minimum response time1 ms
0.0010 s
4 ms
0.0040 s
5 ms
0.0050 s
Average response time3 ms
0.0030 s
-8 ms
0.0080 s
Input lag-25 ms
0.0250 s
8.9 ms
0.0089 s
CoatingAnti-glare/Matte (3H)Anti-glare/Matte (2H)Anti-glare/Matte (3H)

3D

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

3DNoNoNo

Frequencies

Information about the horizontal and vertical refresh rates/frequencies.

Horizontal frequency (digital)30 kHz - 246 kHz--
Vertical frequency (digital)24 Hz - 144 Hz48 Hz - 100 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 V
220V220 V - 240 V220 V - 240 V220 V - 240 V
Alternating current frequency50 Hz - 60 Hz50 Hz - 60 Hz50 Hz - 60 Hz
Electric current (A)3 A-3 A
Power consumption (off)0.2 W0.5 W-
Power consumption (sleep)0.3 W0.5 W0.5 W
Power consumption (average)46.35 W55 W51.5 W
Power consumption (maximum)125 W73 W240 W
Power consumption (annual)144.04 kWh--
Energy efficiency class-C-

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.

Width894.9 mm
89.49 cm
35.2323 in
2.936 ft
808.7 mm
80.87 cm
31.8386 in
2.6532 ft
946.6 mm
94.66 cm
37.2677 in
3.1056 ft
Height399.4 mm
39.94 cm
15.7244 in
1.3104 ft
362.8 mm
36.28 cm
14.2835 in
1.1903 ft
-
Depth130.1 mm
13.01 cm
5.122 in
0.4268 ft
167 mm
16.7 cm
6.5748 in
0.5479 ft
101.6 mm
10.16 cm
4 in
0.3333 ft
Weight7.9 kg
17.42 lbs
6.1 kg
13.45 lbs
9.5 kg
20.94 lbs
Width with stand894.9 mm
89.49 cm
35.2323 in
2.936 ft
808.7 mm
80.87 cm
31.8386 in
2.6532 ft
946.6 mm
94.66 cm
37.2677 in
3.1056 ft
Height with stand449.7 mm
44.97 cm
17.7047 in
1.4754 ft
516 mm
51.6 cm
20.315 in
1.6929 ft
457.8 mm
45.78 cm
18.0236 in
1.502 ft
Depth with stand293.5 mm
29.35 cm
11.5551 in
0.9629 ft
309.4 mm
30.94 cm
12.1811 in
1.0151 ft
248 mm
24.8 cm
9.7638 in
0.8136 ft
Weight with stand12.1 kg
26.68 lbs
7.6 kg
16.76 lbs
13.8 kg
30.42 lbs
Box weight19.3 kg
42.55 lbs
-21.6 kg
47.62 lbs
Stand width--385 mm
38.5 cm
15.1575 in
1.2631 ft
Stand depth--247 mm
24.7 cm
9.7244 in
0.8104 ft
ColorsBlackGrayBlack and Silver

Ergonomics

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

VESA mountYesYesYes
VESA interface100 x 100 mm100 x 100 mm100 x 100 mm
Removable standYesYesYes
Height adjustmentYesYesYes
Height adjustment range130 mm
13 cm
5.1181 in
0.4265 ft
100 mm
10 cm
3.937 in
0.3281 ft
120 mm
12 cm
4.7244 in
0.3937 ft
Landscape/portrait pivotNoNoNo
Left/right swivelYesNoYes
Left swivel20 °-35 °
Right swivel20 °-35 °
Forward/backward tiltYesYesYes
Forward tilt5 °2 °5 °
Backward tilt21 °34 °20 °
Stand width - 599.6 mm--

Audio

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

Speakers-2 x 7 W2 x 9 W

Camera

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

CameraNoNoNo

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)
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)
2 x USB 3.0 (downstream)
1 x USB 3.0 (upstream)
2 x HDMI 2.0
1 x DisplayPort 1.2
1 x 3.5 mm Audio Out
4 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)
High-bandwidth Digital Content Protection (HDCP)-High-bandwidth Digital Content Protection (HDCP) 2.2

Features

Some additional functional features of the model.

FeaturesAlienFX Lighting
Ambient Light Sensor
ComfortView
Flicker-free technology
Low Blue Light
Nano IPS
NVIDIA G-Sync Ultimate Certified
Picture-by-Picture
Picture-in-Picture
AMD FreeSync technology
Eco Saving Plus
Eye Saver Mode
Flicker-free technology
Picture-by-Picture
Picture-in-Picture
Quantum Dot Color
Samsung MagicBright
Samsung MagicUpscale
ComfortView Plus
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 licensesCECP
CEL
ENERGY STAR
RoHS Compliant
TCO Certified Displays
TUV Rheonland Eye Safety Certified
ENERGY STAR 6.0
ISO9241-307
TÜV/Ergonomics
-

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
10 °C - 40 °C
50 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
Operating humidity10 % - 80 %10 % - 80 %10 % - 80 %
Operating altitude5000 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
Storage humidity5 % - 90 %5 % - 95 %5 % - 90 %
Storage altitude12192 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
Mini-DisplayPort to DisplayPort Cable
USB Type-B 3.2 Gen 1 cable
-DisplayPort cable
HDMI cable
Thunderbolt 4 (USB-C) Active Cable
USB Type-A to Type-B cable

Additional features

Information about other features.

Additional featuresSecurity lock slotAnti-theft stand lock slot - KensingtonSecurity lock slot
 Dell AW3821DWSamsung C34F791Dell U4021QW