Comparison between Dell S2740L vs Dell S2721DS

General Info
Model Number	Dell S2740L	Dell S2721DS

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2012	2020
Brand	Dell	Dell
Model Number	S2740L	S2721DS
Display
Screen Size Class	27" (inches)	27" (inches)
Diagonal Size	27 in 68.6 cm 685.8 mm 2.25 ft	26.96 in 68.5 cm 684.7 mm 2.25 ft
Screen Width	23.54 in 59.8 cm 597.888 mm 1.96 ft	23.49 in 59.7 cm 596.736 mm 1.96 ft
Screen Height	13.24 in 33.6 cm 336.312 mm 1.1 ft	13.22 in 33.6 cm 335.664 mm 1.1 ft
Display Manufacturer	LG Display
Display Type	AH-IPS	IPS
Display Bit Depth	8 bits (6 bits + FRC)	8 bits
Frame Rate Control	Yes
Max Number of Colors	16777216	16777216
Bits	24	24
Screen Aspect Ratio	16:9	16:9
Screen Resolution	1920 x 1080	2560 x 1440
Screen Pixel Pitch	0.311 mm	0.233 mm
Screen Pixel Density	81 ppi	109 ppi
Screen-to-Body Ratio	82.37 %	89.83 %
Backlight Source	W-LED	W-LED
sRGB	84 %	99 %
NTSC 1953	72 %
Screen Brightness	270 cd/m²	350 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Dynamic Screen Contrast	8000000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Screen Input Lag	5 ms
Display Minimum Response Time	7 ms	4 ms
Display Average Response Time	14 ms	8 ms
Display Coating	Anti-glare/Matte (3H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	2.44 in 6.2 cm 61.9 mm 0.2 ft	2.18 in 5.5 cm 55.4 mm 0.18 ft
Case Weight	5.28 kg 12 lbs	4.4 kg 10 lbs
Case Width with Stand	25.27 in 64.2 cm 641.9 mm 2.11 ft	24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height with Stand	18.06 in 45.9 cm 458.7 mm 1.5 ft	15.75 in 40 cm 400.1 mm 1.31 ft
Case Depth with Stand	8.5 in 21.6 cm 215.8 mm 0.71 ft	6.88 in 17.5 cm 174.7 mm 0.57 ft
Case Weight with Stand	7.56 kg 17 lbs	6.2 kg 14 lbs
Case Color	Black	Silver
Hardware
Built-in Camera	No	No
Connectivity	1 x HDMI 1 x DVI-D Dual Link 1 x 3.5 mm Audio Out 1 x D-sub 2 x USB 2.0 (downstream) 1 x USB 2.0 (upstream)	1 x 3.5 mm Audio Out 2 x HDMI 1.4 1 x DisplayPort 1.2
Audio
Audio Speakers		2 x 3W
Features
Cool Features	DDC/CI HDCP (High-bandwidth Digital Content Protection)	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features		Anti-theft stand lock slot - Kensington
Ergonomics
Case Width	25.27 in 64.2 cm 641.9 mm 2.11 ft	24.08 in 61.2 cm 611.6 mm 2.01 ft
Case Height	14.97 in 38 cm 380.3 mm 1.25 ft	14.35 in 36.5 cm 364.6 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	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	4 °	5 °
Backward Tilt	21 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	56 Hz - 76 Hz	48 Hz - 75 Hz
Horizontal Digital Frequency	30 kHz - 83 kHz	30 kHz - 115 kHz
Screen Interpolation Measurement Unit		NULL
Accessories
Extras	D-sub cable DVI-D cable USB upstream cable	HDMI cable
Certificates and Standards
Licenses	ENERGY STAR Epeat Silver	ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light
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	3048	5000
Max Storage Altitude	10668	12192

Dell S2740L

Dell S2721DS