Comparison between Dell U3821DW vs Dell P2421

General Info
Model Number	Dell U3821DW	Dell P2421

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Type	Monitor	Monitor
Year	2021	2020
Brand	Dell	Dell
Model Series	UltraSharp
Model Number	U3821DW	P2421
Display
Screen Size Class	38" (inches)	24" (inches)
Diagonal Size	37.52 in 95.3 cm 952.9 mm 3.13 ft	24.06 in 61.1 cm 611 mm 2 ft
Screen Width	35.04 in 89 cm 890 mm 2.92 ft	20.41 in 51.8 cm 518.4 mm 1.7 ft
Screen Height	15.27 in 38.8 cm 387.8 mm 1.27 ft	12.76 in 32.4 cm 324 mm 1.06 ft
Display Curvature	2300
Display Type	IPS	IPS
Display Bit Depth	10 bits	8 bits
Max Number of Colors	1073741824	16777216
Bits	30	24
Screen Aspect Ratio	24:10	16:10
Screen Resolution	3840 x 1600	1920 x 1200
Screen Pixel Pitch	0.229 mm	0.27 mm
Screen Pixel Density	109 ppi	94 ppi
Screen-to-Body Ratio	98.38 %	86.78 %
Backlight Source	W-LED	W-LED
DCI P3	95%
sRGB	100 %	99 %
Screen Brightness	300 cd/m²	300 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Minimum Response Time	5 ms	5 ms
Display Average Response Time	8 ms	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
HDR	DisplayHDR 600
3D	No
Size, weight, color
Case Depth	4.03 in 10.2 cm 102.4 mm 0.34 ft	1.74 in 4.4 cm 44.1 mm 0.14 ft
Case Weight	8.8 kg 19 lbs	3.5 kg 8 lbs
Case Width with Stand	35.21 in 89.4 cm 894.3 mm 2.93 ft	20.91 in 53.1 cm 531 mm 1.74 ft
Case Height with Stand	17.47 in 44.4 cm 443.8 mm 1.46 ft	14.6 in 37.1 cm 370.8 mm 1.22 ft
Case Depth with Stand	9.89 in 25.1 cm 251.2 mm 0.82 ft	6.54 in 16.6 cm 166 mm 0.54 ft
Case Weight with Stand	13.6 kg 30 lbs
Case Color	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.2 (Type-C; upstream; 90W; DP Alt Mode) 4 x USB 3.2 (Type-A; Gen 1; downstream) 2 x HDMI 2.0 1 x 3.5 mm Audio Out (line-out for speakers) 1 x DisplayPort 1.4 1 x Ethernet RJ45 1 x USB 3.2 (Type-B; Gen 1; upstream) 1 x USB 3.2 (Type-C; downstream)	1 x USB 3.0 (upstream) 1 x HDMI 1.4 1 x DVI-D 1 x D-sub 1 x DisplayPort 1.2 2 x USB 2.0 (downstream) 2 x USB 3.0 (downstream)
Audio
Audio Speakers	2 x 9W
Features
Cool Features	Low Blue Light Picture-by-Picture Picture-in-Picture Flicker-free technology KVM Switch	Flicker-free technology Low Blue Light
Extra Features	Security lock slot	Security lock slot
Ergonomics
Case Width	35.21 in 89.4 cm 894.3 mm 2.93 ft	20.91 in 53.1 cm 531 mm 1.74 ft
Case Height	15.44 in 39.2 cm 392.3 mm 1.29 ft	14.35 in 36.5 cm 364.5 mm 1.2 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	Yes
Height Adjustment Range	120 mm 12 cm 4.7244 in 0.3937 ft	130 mm 13 cm 5.1181 in 0.4265 ft
Landscape or Portrait Pivot Support	No	Yes
Left Pivot		90 °
Right Pivot		90 °
Left or Right Swivel Support	Yes	Yes
Left Swivel	30 °	45 °
Right Swivel	30 °	45 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	56 Hz - 76 Hz	60 Hz
Horizontal Digital Frequency	30 kHz - 100 kHz
Screen Interpolation Measurement Unit	NULL	NULL
Accessories
Extras	DisplayPort cable HDMI cable USB Type-C cable USB Type-B 3.2 Gen 1 cable	DisplayPort cable D-Sub cable (Japan only)
Certificates and Standards
Licenses	ENERGY STAR 8.0 EPEAT Gold RoHS TAA Availability TCO Certified Displays	ENERGY STAR EPEAT RoHS TCO Certified Display
Usage and Storage Requirements
Safe Operating Temperature Level	0 °C - 40 °C 32 °F - 104 °F	0 °C - 40 °C 32 °F - 104 °F
Safe Operating Humidity Level	10 % - 80 %	20 % - 80 %
Internal Storage Temperature	-20 °C - 60 °C -4 °F - 140 °F	-20 °C - 60 °C -4 °F - 140 °F
Internal Storage Humidity	5 % - 90 %	10 % - 90 %
Max Operating Altitude	5000	5000
Max Storage Altitude	12192	12192

Dell U3821DW

Dell P2421