Compare Dell S2721QS vs Dell S2421HS vs Dell E2421HN
Connectivity
Ports
1x 3.5 mm Audio Out, 2x HDMI 2.0, 1x DisplayPort 1.2
1x 3.5 mm Audio Out, 1x HDMI 1.4, 1x DisplayPort 1.2
1x HDMI 1.4, 1x D-sub
Construction
Adjustment | Height
110 mm / 4.3307 in
100 mm / 3.937 in
N/A
Adjustment | Pivot
-90° ~ 90°
-90° ~ 90°
N/A
Adjustment | Swivel
-30° ~ 30°
-30° ~ 30°
N/A
Adjustment | Tilt
-5° ~ 21°
-5° ~ 21°
-5° ~ 21°
Camera
No
No
No
Colors
Silver
Black, Silver
Black
Speakers
2x 3W
VESA Mount
100 x 100 mm
100 x 100 mm
100 x 100 mm
Dimensions
Bezels
89.83% screen-to-body ratio
90.06% screen-to-body ratio
86.91% screen-to-body ratio
Size | Depth
2.18 in / 55.4 mm w/o stand, 6.88 in / 174.7 mm w/ stand
2.12 in / 53.8 mm w/o stand, 6.29 in / 159.7 mm w/ stand
2.06 in / 52.4 mm w/o stand, 6.73 in / 171 mm w/ stand
Size | Height
14.35 in / 364.6 mm w/o stand, 15.75 in / 400.1 mm w/ stand
12.7 in / 322.6 mm w/o stand, 13.65 in / 346.8 mm w/ stand
12.85 in / 326.5 mm w/o stand, 16.52 in / 419.7 mm w/ stand
Size | Width
24.08 in / 611.6 mm
21.17 in / 537.8 mm
21.68 in / 550.6 mm
Weight
4.7 kg / 10 lbs w/o stand , 6.4 kg / 14 lbs w/ stand
3.2 kg / 7 lbs w/o stand , 4.8 kg / 11 lbs w/ stand
3.25 kg / 7 lbs w/o stand , 4.27 kg / 9 lbs w/ stand
Display
Aspect Ratio
16:9
16:9
16:9
Brightness
350 nits / 390 nits (peak)
250 nits
250 nits
Contrast Ratio
1300:1 (static)
1000:1 (static)
1000:1 (static)
Display Backlight
W-LED
W-LED
W-LED
Display Color Depth
10 bits, 1073741824 colors
8 bits, 16777216 colors
8 bits (6 bits + FRC), 16777216 colors
Display Diagonal
27" (26.96 in / 684.7 mm)
24" (23.8 in / 604.478 mm)
24" (23.81 in / 604.7 mm)
Display Type
IPS, Anti-glare/Matte (3H)
IPS, Anti-glare/Matte (3H)
IPS, Anti-glare/Matte
Gamut
99% sRGB
72% NTSC
72% NTSC
Pixel Density
163 ppi
92 ppi
92 ppi
Pixel Pitch
0.155 mm
0.275 mm
0.275 mm
Refresh Rate
40 Hz ~ 60 Hz
48 Hz ~ 75 Hz
56 Hz ~ 76 Hz
Resolution
4K (3840x2160)
FHD (1920x1080)
FHD (1920x1080)
Response Time
4 ms (min) / 8 ms (avg)
4 ms (min) / 8 ms (avg)
5 ms (min) / 8 ms (avg)
Viewing Angle
178° H / 178° V
178° H / 178° V
178° H / 178° V
Function
Licenses
ENERGY STAR 8.0, EPEAT, RoHS, TCO Certified, TUV Flicker Free, TUV Low Blue Light
ENERGY STAR 8.0, EPEAT, RoHS, TCO Certified, TUV Flicker Free, TUV Low Blue Light
Energy Star, EPEAT, TCO Certified Display
Operating Humidity
10 % ~ 80 %
10 % ~ 80 %
10 % ~ 80 %
Operating Temperature
0 °C ~ 40 °C , 32 °F ~ 104 °F
0 °C ~ 40 °C , 32 °F ~ 104 °F
0 °C ~ 40 °C , 32 °F ~ 104 °F
Variable Framerate
AMD FreeSync
AMD FreeSync
Video
Flicker-free technology, Low Blue Light, 3-sided bezeless design
Flicker-free technology, Low Blue Light, 3-sided bezeless design
Flicker-free technology, Low Blue Light, Power Nap, ComfortView, Dell Display Manager
Performance
Power Consumption
28 W (average) / 52 W (max) / 24.3 W (eco) / 0.3 W (sleep) / 0.3 W (off)
18 W (average) / 23 W (max) / 11.04 W (eco) / 0.3 W (sleep) / 0.3 W (off)
15 W (average) / 0.5 W (sleep) / 0.3 W (off)
Production
Accessory
HDMI cable
HDMI cable
D-Sub cable, HDMI cable
Debut
2020
2020
2020
Reviews
Neofiliac score
64%
50%
26%
Pros
- Stand with tilt, swivel, pivot, and height adjustments
- High 1300:1 contrast ratio
- 10-bit display panel
- Build-in speakers included
- Stand with tilt, swivel, pivot, and height adjustments
- High 1000:1 contrast ratio
- High 90.06 % screen-to-body ratio
- High 1000:1 contrast ratio
Cons
- No publicized HDR support
- No publicized HDR support
- 8-bit display panel
- Display panel not very bright
- No publicized HDR support
- Only tilt adjustment
- 8-bit display panel
- Display panel not very bright
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