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Compare Dell U2721DE vs Dell U2421E vs Dell P2423

Connectivity

Ports
1x USB 3.1 (Type-C; upstream; DP; 65W), 1x Ethernet RJ45, 1x DisplayPort 1.4, 1x 3.5 mm Audio Out, 1x DisplayPort 1.4 (Output MST), 1x HDMI 1.4, 2x USB 3.0 (downstream), 2x USB 3.0 (downstream; BC 1.2)
1x USB 3.2 (Type-C; Gen 1; upstream; 90W; DP Alt Mode), 1x Ethernet RJ45, 1x DisplayPort 1.4, 1x 3.5 mm Audio Out, 1x DisplayPort 1.4 (Output MST), 1x HDMI 1.4, 4x USB 3.2 (Type-A; Gen 1; downstream; 2x BC 1.2), 1x USB 3.2 (Type-C; Gen 1; downstream; 15W)
1x HDMI 1.4, 1x DisplayPort 1.2, 1x D-sub, 1x DVI-I, 4x USB 3.2 (Type-A; Gen 1; 5 Gbps downstream), 1x USB 3.2 (Type-B; Gen 1; 5 Gbps upstream)

Construction

Adjustment | Height
130 mm / 5.1181 in
150 mm / 5.9055 in
150 mm / 5.9055 in
Adjustment | Pivot
-90° ~ 90°
-90° ~ 90°
-90° ~ 90°
Adjustment | Swivel
-40° ~ 40°
-45° ~ 45°
-45° ~ 45°
Adjustment | Tilt
-5° ~ 21°
-5° ~ 21°
-5° ~ 21°
Camera
No
No
No
Colors
Black
Black
Black and Silver
VESA Mount
100 x 100 mm
100 x 100 mm
100 x 100 mm

Dimensions

Bezels
92.16% screen-to-body ratio
100.87% screen-to-body ratio
90.87% screen-to-body ratio
Size | Depth
1.54 in / 39 mm w/o stand, 7.09 in / 180 mm w/ stand
1.54 in / 39 mm w/o stand, 6.81 in / 173 mm w/ stand
2.1 in / 53.26 mm w/o stand, 7.07 in / 179.57 mm w/ stand
Size | Height
13.98 in / 355 mm w/o stand, 15.36 in / 390.2 mm w/ stand
12.35 in / 313.7 mm w/o stand, 14.33 in / 364 mm w/ stand
13.7 in / 348.1 mm w/o stand, 14.33 in / 364 mm w/ stand
Size | Width
24.1 in / 612.2 mm
20.9 in / 530.8 mm
20.91 in / 531 mm
Weight
4.19 kg / 9 lbs w/o stand , 6.24 kg / 14 lbs w/ stand
4 kg / 9 lbs w/o stand , 6.1 kg / 13 lbs w/ stand
3.53 kg / 8 lbs w/o stand , 5.56 kg / 12 lbs w/ stand

Display

Aspect Ratio
16:9
16:10
16:10
Brightness
350 nits
350 nits
300 nits
Contrast Ratio
1000:1 (static)
1000:1 (static)
1000:1 (static)
Display Backlight
W-LED
W-LED
W-LED
Display Color Depth
8 bits, 16777216 colors
8 bits (6 bits + FRC), 16777216 colors
8 bits, 16777216 colors
Display Diagonal
27" (26.96 in / 684.7 mm)
24" (24.06 in / 611 mm)
24" (24 in / 609.6 mm)
Display Type
IPS, Anti-glare/Matte (3H)
IPS, Anti-glare/Matte (3H)
IPS, Anti-glare/Matte (3H)
Gamut
89% DCI-P3, 99% sRGB
99% sRGB
99% sRGB
Pixel Density
109 ppi
94 ppi
94 ppi
Pixel Pitch
0.233 mm
0.275 mm
0.27 mm
Refresh Rate
56 Hz ~ 76 Hz
60 Hz
56 Hz ~ 76 Hz
Resolution
QHD (2560x1440)
WUXGA (1920x1200)
WUXGA (1920x1200)
Response Time
5 ms (min) / 8 ms (avg)
5 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, EPEAT, TCO Certified, RoHS, NFPA 99
ENERGY STAR, EPEAT Golf, TCO Certified, TUV Rheinland Low Blue Light Certified
EPEAT Gold, Energy Star, RoHS, TCO Certified Edge, TUV Rheinland Flicker-free Certified, TUV Rheinland Low Blue Light Certified (Hardware Solution)
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
Video
Flicker-free technology, Low Blue Light
Easy Arrange, Flicker-free technology, Low Blue Light, Infinity Edge design, ComfortView Plus, Dell Display Manager
Dell Display Manager, Flicker-free technology, On-Screen Display (OSD) menu, Low Blue Light, 3-side bezelless design, ComfortView Plus

Performance

Power Consumption
33.2 W (average) / 160 W (max) / 19.9 W (eco) / 0.3 W (sleep) / 0.3 W (off)
30 W (average) / 186 W (max)
14.8 W (average) / 48 W (max) / 12.85 W (eco) / 0.3 W (sleep) / 0.2 W (off)

Production

Accessory
DisplayPort cable, USB Type-C to Type-C cable
DisplayPort cable, USB Type-C to Type-A cable, USB Type-C to Type-C cable
DisplayPort cable, USB Type-C cable, USB Type-A to Type-C cable
Debut
2020
2020
2022

Reviews

Neofiliac score
56%
56%
58%
Pros
  • Stand with tilt, swivel, pivot, and height adjustments
  • High 1000:1 contrast ratio
  • High 92.16 % screen-to-body ratio
  • Stand with tilt, swivel, pivot, and height adjustments
  • High 1000:1 contrast ratio
  • High 100.87 % screen-to-body ratio
  • Stand with tilt, swivel, pivot, and height adjustments
  • High 1000:1 contrast ratio
  • High 90.87 % screen-to-body ratio
  • 16:10 aspect ratio
Cons
  • No publicized HDR support
  • 8-bit display panel
  • No publicized HDR support
  • 8-bit display panel
  • No publicized HDR support
  • 8-bit display panel

Price

Offers (incl. referral links)
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