Products
Dell UltraSharp U2520D
Dell UltraSharp U2721DE
Tested using Methodology v1.1
Updated May 29, 2024 01:46 PM
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Tested using Methodology v1.1
Updated Dec 14, 2023 04:44 PM
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Amazon.com
Size25"
Pixel Type
IPS
Variable Refresh Rate
No VRR
Native Resolution2560 x 1440
Max Refresh Rate
60 Hz
Size27"
Pixel Type
IPS
Variable Refresh Rate
No VRR
Native Resolution2560 x 1440
Max Refresh Rate
60 Hz
Our Verdict
Dell UltraSharp U2520D
Dell UltraSharp U2721DE
The Dell UltraSharp U2520D is better than the Dell UltraSharp U2721DE. The U2520D supports HDR, it displays a wider SDR color gamut, has much better out-of-the-box color accuracy, and it has a quicker response time. The U2721DE handles reflections better and it has a wider vertical viewing angle.
Variants
- U2520D (25")
- UltraSharp U2721DE (27")
Check Price
25"
U2520D
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27"
UltraSharp U2721DE
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25"
U2520D
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27"
UltraSharp U2721DE
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25"
U2520D
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Walmart.com
27"
UltraSharp U2721DE
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25"
U2520D
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27"
UltraSharp U2721DE
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.7
7.4
Full Comparison
Design
Style
Design Picture
Size
25"
27"
Curved
No
No
Curve Radius
Not Curved
Not Curved
Weight (without stand)
9.3 lbs (4.2 kg)
8.9 lbs (4.0 kg)
Weight (with stand)
13.2 lbs (6.0 kg)
12.6 lbs (5.7 kg)
Stand
Stand Picture
Width
9.6" (24.4 cm)
9.1" (23.0 cm)
Depth
7.3" (18.5 cm)
7.1" (18.0 cm)
Ergonomics
8.4
8.5
Ergonomics Picture
Height Adjustment
5.1" (13.0 cm)
5.1" (13.0 cm)
Switch Portrait/Landscape
Yes, Both Ways
Yes, Both Ways
Swivel Range
-45° to 45°
-40° to 40°
Tilt Range
-20° to 2.5°
-20° to 5°
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.7 cm)
0.2" (0.6 cm)
Thickness
Thickness Picture
Thickness (with stand)
4.7" (12.0 cm)
5.0" (12.8 cm)
Thickness (without stand)
2.0" (5.0 cm)
1.5" (3.8 cm)
Build Quality
7.5
7.5
Build Quality Picture
Picture Quality
Contrast
6.0
6.0
Checkerboard Picture
Native Contrast
1,010 : 1
1,014 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Edge
SDR Peak Brightness
7.9
7.7
SDR Real Scene
332 cd/m²
314 cd/m²
SDR Peak 2% Window
350 cd/m²
347 cd/m²
SDR Peak 10% Window
350 cd/m²
348 cd/m²
SDR Peak 25% Window
351 cd/m²
348 cd/m²
SDR Peak 50% Window
351 cd/m²
349 cd/m²
SDR Peak 100% Window
351 cd/m²
349 cd/m²
SDR Sustained 2% Window
349 cd/m²
347 cd/m²
SDR Sustained 10% Window
350 cd/m²
348 cd/m²
SDR Sustained 25% Window
350 cd/m²
348 cd/m²
SDR Sustained 50% Window
351 cd/m²
349 cd/m²
SDR Sustained 100% Window
351 cd/m²
349 cd/m²
SDR ABL
0.000
0.000
HDR Peak Brightness
6.7
0.0
HDR Real Scene
385 cd/m²
N/A
HDR Peak 2% Window
388 cd/m²
N/A
HDR Peak 10% Window
436 cd/m²
N/A
HDR Peak 25% Window
439 cd/m²
N/A
HDR Peak 50% Window
442 cd/m²
N/A
HDR Peak 100% Window
444 cd/m²
N/A
HDR Sustained 2% Window
388 cd/m²
N/A
HDR Sustained 10% Window
436 cd/m²
N/A
HDR Sustained 25% Window
439 cd/m²
N/A
HDR Sustained 50% Window
441 cd/m²
N/A
HDR Sustained 100% Window
443 cd/m²
N/A
HDR ABL
0.008
N/A
Horizontal Viewing Angle
8.2
7.4
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
43°
39°
Color Washout From Right
43°
39°
Horizontal Hue Graph
Color Shift From Left
49°
48°
Color Shift From Right
52°
47°
Horizontal Lightness Graph
Brightness Loss From Left
46°
45°
Brightness Loss From Right
46°
46°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
41°
Gamma Shift From Left
55°
39°
Gamma Shift From Right
57°
38°
Vertical Viewing Angle
6.6
7.6
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
31°
32°
Color Washout From Above
31°
34°
Vertical Hue Graph
Color Shift From Below
33°
41°
Color Shift From Above
32°
43°
Vertical Lightness Graph
Brightness Loss From Below
35°
34°
Brightness Loss From Above
34°
36°
Black Level Raise From Below
52°
70°
Black Level Raise From Above
54°
70°
Gamma Shift From Below
31°
44°
Gamma Shift From Above
32°
63°
Gray Uniformity
8.7
8.7
50% Uniformity Picture
50% Std. Dev.
3.014%
2.436%
50% DSE
0.110%
0.115%
5% Uniformity Picture
5% Std. Dev.
0.394%
0.279%
5% DSE
0.055%
0.041%
Black Uniformity
6.1
7.1
Native Black Uniformity Picture
Native Std. Dev.
1.965%
1.219%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
8.0
7.1
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Color Space (sRGB)
Standard
Luminance
75 cd/m²
103 cd/m²
Luminance Settings
21
22
Contrast Setting
75
78
RGB Controls
100-100-100
100-100-100
Gamma Setting
No Gamma Setting
No Gamma Setting
Color Temperature
6,606 K
5,949 K
White Balance dE
3.01
3.53
Color dE
1.99
3.19
Gamma
2.25
2.24
Post Calibration
9.7
9.7
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom Color
Luminance
98 cd/m²
101 cd/m²
Luminance Settings
21
23
Contrast Setting
75
78
RGB Controls
96-98-100
94-92-100
Gamma Setting
No Gamma Setting
No Gamma Setting
Color Temperature
6,470 K
6,489 K
White Balance dE
0.49
0.40
Color dE
0.40
0.52
Gamma
2.17
2.17
SDR Color Gamut
9.1
8.6
Color Gamut sRGB Picture
sRGB xy
99.6%
96.8%
Color Gamut ARGB Picture
Adobe RGB xy
82.4%
75.3%
sRGB Picture Mode
Custom Color
Custom Color
Adobe RGB Picture Mode
Custom Color
Custom Color
SDR Color Volume
9.3
8.9
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.8%
96.6%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
87.5%
81.4%
sRGB Picture Mode
Custom Color
Custom Color
Adobe RGB Picture Mode
Custom Color
Custom Color
HDR Color Gamut
7.0
0.0
Wide Color Gamut
Yes
N/A
Color Gamut DCI-P3 Picture
DCI P3 xy
71.9%
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
68.2%
N/A
DCI P3 Picture Mode
Display HDR
No HDR
Rec. 2020 Picture Mode
Display HDR
No HDR
HDR Color Volume
6.5
0.0
P3 Color Volume ITP Picture
DCI-P3 In ICtCp
63.7%
N/A
2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
66.2%
N/A
DCI P3 Picture Mode
Display HDR
No HDR
Rec. 2020 Picture Mode
Display HDR
No HDR
Image Retention
10
10
Image Retention Picture
IR After 0 Min Recovery
0.00%
0.00%
IR After 2 Min Recovery
0.00%
0.00%
IR After 4 Min Recovery
0.00%
0.00%
IR After 6 Min Recovery
0.00%
0.00%
IR After 8 Min Recovery
0.00%
0.00%
IR After 10 Min Recovery
0.00%
0.00%
Gradient
8.4
7.8
Gradient Picture
Color Depth
8 Bit
8 Bit
Color Bleed
10
10
Color Bleed Horizontal
Pixel Row Error
0.001%
0.000%
Color Bleed Vertical
Pixel Column Error
0.009%
0.002%
Reflections
6.4
7.6
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
7.3%
6.5%
Indirect Reflections
3.9%
5.7%
Calculated Direct Reflections
3.4%
0.8%
Text Clarity
7.5
7.0
ClearType On
Pixel Type
IPS
IPS
ClearType Off
Pixels
Sub-Pixel Layout
RGB
RGB
Motion
Response Time @ Max Refresh Rate
8.3
7.1
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
6.3 ms
7.7 ms
Total Response Time
12.5 ms
19.2 ms
Overshoot Error
5.2%
4.5%
Dark Rise / Fall Time
7.0 ms
8.4 ms
Dark Total Response Time
13.3 ms
20.7 ms
Dark Overshoot Error
7.3%
6.0%
Response Time @ 60Hz
8.3
7.1
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
6.3 ms
7.7 ms
Total Response Time
12.5 ms
19.2 ms
Overshoot Error
5.2%
4.5%
Dark Rise / Fall Time
7.0 ms
8.4 ms
Dark Total Response Time
13.3 ms
20.7 ms
Dark Overshoot Error
7.3%
6.0%
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Black Frame Insertion (BFI)
0.0
0.0
Black Frame Insertion (BFI)
No BFI
No BFI
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
5.9
5.9
Variable Refresh Rate
No VRR
No VRR
Native
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Variable Refresh Rate
No
No
FreeSync
No
No
G-SYNC
No
No
VRR Maximum
N/A
N/A
VRR Minimum
No VRR
No VRR
VRR Supported Connectors
No VRR
No VRR
Inputs
Input Lag
9.0
9.0
Native Resolution
8.7 ms
8.7 ms
Native Resolution @ 60Hz
8.7 ms
8.7 ms
Variable Refresh Rate
N/A
N/A
Variable Refresh Rate @ 60Hz
N/A
N/A
10 Bit HDR
N/A
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
8.3
8.3
Native Resolution
2560 x 1440
2560 x 1440
Aspect Ratio
16:9
16:9
Megapixels
3.7 MP
3.7 MP
Pixel Density
117 PPI
109 PPI
Screen Diagonal
25.0"
27.0"
Screen Area
268 in²
310 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.4)
1 (DP 1.4)
Mini DisplayPort
No
No
HDMI
1 (HDMI 2.0)
1 (HDMI 1.4)
DVI
No
No
VGA
No
No
DisplayPort Out
1 (DP 1.4)
1 (DP 1.4)
USB
3 (USB 3.0)
4 (USB 3.0)
USB C
2 (1x USB, USB PD, DP Alt Mode, 1x USB 3 Amp))
1 (USB, USB PD, DP Alt Mode)
Analog Audio Out 3.5mm
1
1
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
Internal
Internal
Features
Additional Features
RGB Illumination
No
No
Speakers
No
No
HDR10
Yes
No
Multiple Input Display
No
No
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
25"
U2520D
SEE PRICE
Amazon.com
27"
UltraSharp U2721DE
SEE PRICE
Amazon.com
25"
U2520D
SEE PRICE
BestBuy.com
27"
UltraSharp U2721DE
SEE PRICE
BestBuy.com
25"
U2520D
SEE PRICE
Walmart.com
27"
UltraSharp U2721DE
SEE PRICE
Walmart.com
25"
U2520D
SEARCH
B&H
27"
UltraSharp U2721DE
SEARCH
B&H
Dell UltraSharp U2520D
Dell UltraSharp U2721DE
Comments
Dell UltraSharp U2520D vs Dell UltraSharp U2721DE: Main Discussion
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