Comparison between Dell S2721QS vs Dell S2817Q

General Info
Model Number	Dell S2721QS	Dell S2817Q

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2020	2016
Brand	Dell	Dell
Model Number	S2721QS	S2817Q
Display
Screen Size Class	27" (inches)	28" (inches)
Diagonal Size	26.96 in 68.5 cm 684.7 mm 2.25 ft	27.9 in 70.9 cm 708.6 mm 2.32 ft
Screen Width	23.49 in 59.7 cm 596.736 mm 1.96 ft	24.45 in 62.1 cm 620.93 mm 2.04 ft
Screen Height	13.22 in 33.6 cm 335.664 mm 1.1 ft	13.44 in 34.1 cm 341.28 mm 1.12 ft
Display Type	IPS	TN
Display Bit Depth	10 bits	10 bits (8 bits + FRC)
Frame Rate Control		Yes
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	0.155 mm	0.162 mm
Screen Pixel Density	163 ppi	157 ppi
Screen-to-Body Ratio	89.83 %	84.23 %
Backlight Source	W-LED	W-LED
sRGB	99 %
NTSC 1953		72 %
Screen Brightness	350 cd/m²	300 cd/m²
Max Screen Brightness	390 cd/m²
Static Screen Contrast	1300 : 1	1000 : 1
Dynamic Screen Contrast		8000000 : 1
Screen Horizontal Viewing Angle	178 °	170 °
Screen Vertical Viewing Angle	178 °	160 °
Display Minimum Response Time	4 ms	2 ms
Display Average Response Time	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	2.18 in 5.5 cm 55.4 mm 0.18 ft	2.5 in 6.3 cm 63.4 mm 0.21 ft
Case Weight	4.7 kg 10 lbs	5.05 kg 11 lbs
Case Width with Stand	24.08 in 61.2 cm 611.6 mm 2.01 ft	25.9 in 65.8 cm 657.9 mm 2.16 ft
Case Height with Stand	15.75 in 40 cm 400.1 mm 1.31 ft	18.53 in 47.1 cm 470.6 mm 1.54 ft
Case Depth with Stand	6.88 in 17.5 cm 174.7 mm 0.57 ft	7.3 in 18.5 cm 185.4 mm 0.61 ft
Case Weight with Stand	6.4 kg 14 lbs	6.6 kg 15 lbs
Case Color	Silver	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x 3.5 mm Audio Out 2 x HDMI 2.0 1 x DisplayPort 1.2	2 x HDMI 2.0 (MHL) 1 x DisplayPort 1.2 1 x 3.5 mm Audio Out 1 x DisplayPort 1.2 (Input mini) 2 x USB 3.0 (downstream) 1 x USB 3.0 (upstream)
Audio
Audio Speakers	2 x 3W	2 x 3W
Built-in Subwoofer		1 x 6
Features
Cool Features	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology	Picture-by-Picture Picture-in-Picture DDC/CI HDCP (High-bandwidth Digital Content Protection)
Extra Features	Anti-theft stand lock slot - Kensington	Security lock slot
Ergonomics
Case Width	24.08 in 61.2 cm 611.6 mm 2.01 ft	25.9 in 65.8 cm 657.9 mm 2.16 ft
Case Height	14.35 in 36.5 cm 364.6 mm 1.2 ft	15.06 in 38.2 cm 382.4 mm 1.25 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	No
Height Adjustment Range	110 mm 11 cm 4.3307 in 0.3609 ft
Landscape or Portrait Pivot Support	Yes	No
Left Pivot	90 °
Right Pivot	90 °
Left or Right Swivel Support	Yes	No
Left Swivel	30 °
Right Swivel	30 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	40 Hz - 60 Hz	50 Hz - 75 Hz
Horizontal Digital Frequency	130 kHz - 137 kHz	31 kHz - 140 kHz
Screen Interpolation Measurement Unit	NULL
Accessories
Extras	HDMI cable	DisplayPort cable - mini-DP to DP HDMI cable USB 3.0 upstream cable
Certificates and Standards
Licenses	ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light	ENERGY STAR 6.0 Epeat Silver RoHS 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 S2721QS

Dell S2817Q