Comparison between Samsung U28R55 vs Dell S2721QS

General Info
Model Number	Samsung U28R55	Dell S2721QS

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2017	2020
Brand	Samsung	Dell
Model Series	UR55
Model Number	U28R55	S2721QS
Alias	U28R550 U28R55U0
Display
Screen Size Class	28" (inches)	27" (inches)
Diagonal Size	28 in 71.1 cm 711.2 mm 2.33 ft	26.96 in 68.5 cm 684.7 mm 2.25 ft
Screen Width	24.45 in 62.1 cm 620.928 mm 2.04 ft	23.49 in 59.7 cm 596.736 mm 1.96 ft
Screen Height	13.44 in 34.1 cm 341.28 mm 1.12 ft	13.22 in 33.6 cm 335.664 mm 1.1 ft
Display Type	IPS	IPS
Display Bit Depth	10 bits	10 bits
Max Number of Colors	1073741824	1073741824
Bits	30	30
Screen Aspect Ratio	16:9	16:9
Screen Resolution	3840 x 2160	3840 x 2160
Screen Pixel Pitch	0.16 mm	0.155 mm
Screen Pixel Density	157 ppi	163 ppi
Screen-to-Body Ratio	88.7 %	89.83 %
Backlight Source	W-LED	W-LED
sRGB		99 %
Screen Brightness	300 cd/m²	350 cd/m²
Max Screen Brightness		390 cd/m²
Static Screen Contrast	1000 : 1	1300 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Display Minimum Response Time	4 ms	4 ms
Display Average Response Time		8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
HDR	HDR10
3D	No	No
Size, weight, color
Case Depth	2.52 in 6.4 cm 64 mm 0.21 ft	2.18 in 5.5 cm 55.4 mm 0.18 ft
Case Weight	5 kg 11 lbs	4.7 kg 10 lbs
Case Width with Stand	25.15 in 63.9 cm 638.8 mm 2.1 ft	24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height with Stand	18.87 in 47.9 cm 479.3 mm 1.57 ft	15.75 in 40 cm 400.1 mm 1.31 ft
Case Depth with Stand	9.86 in 25.1 cm 250.5 mm 0.82 ft	6.88 in 17.5 cm 174.7 mm 0.57 ft
Case Weight with Stand	5.8 kg 13 lbs	6.4 kg 14 lbs
Case Color	Dark Blue Gray	Silver
Hardware
Built-in Camera	No	No
Connectivity	1 x 3.5 mm Audio Out 1 x HDMI 2.0 1 x DisplayPort 1.2	1 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.2
Audio
Audio Speakers	2 x 4W	2 x 3W
Features
Cool Features	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	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features		Anti-theft stand lock slot - Kensington
Ergonomics
Case Width	25.15 in 63.9 cm 638.8 mm 2.1 ft	24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height	14.72 in 37.4 cm 374 mm 1.23 ft	14.35 in 36.5 cm 364.6 mm 1.2 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	75 x 75	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	No	Yes
Height Adjustment Range		110 mm 11 cm 4.3307 in 0.3609 ft
Landscape or Portrait Pivot Support	No	Yes
Left Pivot		90 °
Right Pivot		90 °
Left or Right Swivel Support	No	Yes
Left Swivel		30 °
Right Swivel		30 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	2 °	5 °
Backward Tilt	15 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	40 Hz - 60 Hz	40 Hz - 60 Hz
Horizontal Digital Frequency		130 kHz - 137 kHz
Screen Interpolation Measurement Unit		NULL
Accessories
Extras		HDMI cable
Certificates and Standards
Licenses	Windows 10 Certification TÜV Rheinland Eye Comfort 2.0 Certification	ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light
Usage and Storage Requirements
Safe Operating Temperature Level	10 °C - 40 °C 50 °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
Internal Storage Humidity		5 % - 90 %
Max Operating Altitude		5000
Max Storage Altitude		12192

Samsung U28R55

Dell S2721QS