Comparison between Dell U2421HE vs Dell UltraSharp U3818DW

General Info
Model Number	Dell U2421HE	Dell UltraSharp U3818DW

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2020	2017
Brand	Dell	Dell
Model Number	U2421HE	UltraSharp U3818DW
Display
Screen Size Class	24" (inches)	38" (inches)
Diagonal Size	23.81 in 60.5 cm 604.7 mm 1.98 ft	37.5 in 95.3 cm 952.5 mm 3.13 ft
Screen Width	20.75 in 52.7 cm 527.04 mm 1.73 ft	34.63 in 88 cm 879.67 mm 2.89 ft
Screen Height	11.67 in 29.6 cm 296.46 mm 0.97 ft	14.43 in 36.7 cm 366.53 mm 1.2 ft
Display Curvature		2300
Display Manufacturer		LG Display
Display Type	IPS	AH-IPS
Display Bit Depth	8 bits	10 bits
Frame Rate Control		No
Max Number of Colors	16777216	1073741824
Bits	24	30
Screen Aspect Ratio	16:9
Screen Resolution	1920 x 1080	3840 x 1600
Screen Pixel Pitch	0.275 mm	0.229 mm
Screen Pixel Density	92 ppi	111 ppi
Screen-to-Body Ratio	92.49 %	90.89 %
Backlight Source	W-LED	W-LED
DCI P3	89%	78.1%
sRGB	99 %	99 %
Screen Brightness	250 cd/m²	350 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Screen Input Lag		25 ms
Display Minimum Response Time	5 ms	5 ms
Display Average Response Time	8 ms	8 ms
Display Maximum Response Time		20 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	1.54 in 3.9 cm 39 mm 0.13 ft	2.19 in 5.6 cm 55.5 mm 0.18 ft
Case Weight	3.37 kg 7 lbs	9.05 kg 20 lbs
Case Width with Stand	21.2 in 53.9 cm 538.5 mm 1.77 ft	35.2 in 89.4 cm 894 mm 2.93 ft
Case Height with Stand	13.72 in 34.8 cm 348.4 mm 1.14 ft	17.01 in 43.2 cm 432 mm 1.42 ft
Case Depth with Stand	6.5 in 16.5 cm 165 mm 0.54 ft	8.91 in 22.6 cm 226.4 mm 0.74 ft
Case Weight with Stand	5.32 kg 12 lbs	12.14 kg 27 lbs
Case Color	Black	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.1 (Type-C; upstream; DP; 65W) 1 x Ethernet RJ45 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out 1 x DisplayPort 1.4 (Output MST) 1 x HDMI 1.4 2 x USB 3.0 (downstream) 2 x USB 3.0 (downstream; BC 1.2)	2 x USB 3.0 (upstream) 2 x HDMI 2.0 1 x 3.5 mm Audio Out 1 x DisplayPort 1.2 4 x USB 3.0 (downstream) 1 x USB 3.0 (Type-C)
Audio
Audio Speakers		2 x 9W
Features
Cool Features	Flicker-free technology Low Blue Light	Picture-in-Picture HDCP (High-bandwidth Digital Content Protection) Picture-by-Picture
Extra Features	Security lock slot	Security lock slot
Ergonomics
Case Width	21.2 in 53.9 cm 538.5 mm 1.77 ft	35.2 in 89.4 cm 894 mm 2.93 ft
Case Height	12.35 in 31.4 cm 313.7 mm 1.03 ft	15.62 in 39.7 cm 396.8 mm 1.3 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	130 mm 13 cm 5.1181 in 0.4265 ft	115 mm 11.5 cm 4.5276 in 0.3773 ft
Landscape or Portrait Pivot Support	Yes	No
Left Pivot	90 °
Right Pivot	90 °
Left or Right Swivel Support	Yes	Yes
Left Swivel	40 °	30 °
Right Swivel	40 °	30 °
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 - 83 kHz
Screen Interpolation Measurement Unit	NULL
Accessories
Extras	DisplayPort cable USB Type-C to Type-C cable	DisplayPort cable Factory Calibration Report HDMI cable USB 3.0 upstream cable USB Type-C cable
Certificates and Standards
Licenses	ENERGY STAR EPEAT TCO Certified RoHS NFPA 99	CECP CEL ENERGY STAR RoHS Compliant TCO Certified Displays
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 %	10 % - 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 %	5 % - 90 %
Max Operating Altitude	5000	5000
Max Storage Altitude	12192	12192

Dell U2421HE

Dell UltraSharp U3818DW