Comparison between Dell P2421D vs Samsung U28R55

General Info
Model Number	Dell P2421D	Samsung U28R55

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2020	2017
Brand	Dell	Samsung
Model Series		UR55
Model Number	P2421D	U28R55
Alias		U28R550 U28R55U0
Display
Screen Size Class	24" (inches)	28" (inches)
Diagonal Size	23.78 in 60.4 cm 604 mm 1.98 ft	28 in 71.1 cm 711.2 mm 2.33 ft
Screen Width	20.74 in 52.7 cm 526.85 mm 1.73 ft	24.45 in 62.1 cm 620.928 mm 2.04 ft
Screen Height	11.67 in 29.6 cm 296.35 mm 0.97 ft	13.44 in 34.1 cm 341.28 mm 1.12 ft
Display Type	IPS	IPS
Display Bit Depth	8 bits (6 bits + FRC)	10 bits
Frame Rate Control	Yes
Max Number of Colors	16777216	1073741824
Bits	24	30
Screen Aspect Ratio	16:9	16:9
Screen Resolution	2560 x 1440	3840 x 2160
Screen Pixel Pitch	0.206 mm	0.16 mm
Screen Pixel Density	123 ppi	157 ppi
Screen-to-Body Ratio	90.13 %	88.7 %
Backlight Source	W-LED	W-LED
sRGB	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	4 ms
Display Average Response Time	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
HDR		HDR10
3D		No
Size, weight, color
Case Depth	1.68 in 4.3 cm 42.7 mm 0.14 ft	2.52 in 6.4 cm 64 mm 0.21 ft
Case Weight	3.37 kg 7 lbs	5 kg 11 lbs
Case Width with Stand	21.17 in 53.8 cm 537.8 mm 1.76 ft	25.15 in 63.9 cm 638.8 mm 2.1 ft
Case Height with Stand	14.02 in 35.6 cm 356.1 mm 1.17 ft	18.87 in 47.9 cm 479.3 mm 1.57 ft
Case Depth with Stand	6.54 in 16.6 cm 166 mm 0.54 ft	9.86 in 25.1 cm 250.5 mm 0.82 ft
Case Weight with Stand		5.8 kg 13 lbs
Case Color		Dark Blue Gray
Hardware
Built-in Camera	No	No
Connectivity	1 x USB 3.0 (upstream) 1 x HDMI 1.4 1 x DisplayPort 1.2 2 x USB 2.0 (downstream) 2 x USB 3.0 (downstream)	1 x 3.5 mm Audio Out 1 x HDMI 2.0 1 x DisplayPort 1.2
Audio
Audio Speakers		2 x 4W
Features
Cool Features	Flicker-free technology Low Blue Light	Samsung MagicUpscale Eco Saving Plus Off Timer Plus Flicker Free Picture-by-Picture Picture-in-Picture Eye Saver Mode AMD Radeon FreeSync Technology Image Size Samsung MagicBright Easy Setting Box
Extra Features	Security lock slot
Ergonomics
Case Width	21.17 in 53.8 cm 537.8 mm 1.76 ft	25.15 in 63.9 cm 638.8 mm 2.1 ft
Case Height	12.68 in 32.2 cm 322.1 mm 1.06 ft	14.72 in 37.4 cm 374 mm 1.23 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	75 x 75
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	No
Height Adjustment Range	130 mm 13 cm 5.1181 in 0.4265 ft
Landscape or Portrait Pivot Support	Yes	No
Left Pivot	90 °
Right Pivot	90 °
Left or Right Swivel Support	Yes	No
Left Swivel	45 °
Right Swivel	45 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	2 °
Backward Tilt	21 °	15 °
Frequency and Interpolation
Vertical Digital Frequency	60 Hz	40 Hz - 60 Hz
Screen Interpolation Measurement Unit	NULL
Accessories
Extras	DisplayPort cable USB Type-C cable
Certificates and Standards
Licenses	ENERGY STAR EPEAT RoHS TCO Certified Display	Windows 10 Certification TÜV Rheinland Eye Comfort 2.0 Certification
Usage and Storage Requirements
Safe Operating Temperature Level	0 °C - 40 °C 32 °F - 104 °F	10 °C - 40 °C 50 °F - 104 °F
Safe Operating Humidity Level	10 % - 90 %	10 % - 80 %
Internal Storage Temperature	-20 °C - 60 °C -4 °F - 140 °F
Internal Storage Humidity	10 % - 90 %
Max Operating Altitude	5000
Max Storage Altitude	12192

Dell P2421D

Samsung U28R55