Products
Dell UltraSharp U2520D
Dell P2423D
Tested using Methodology v1.1
Updated May 29, 2024 01:46 PM
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Tested using Methodology v2.0.1
Updated Feb 19, 2025 04:47 PM
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Max Refresh Rate
60 Hz
Size
25"
Pixel Type
IPS
Native Resolution
2560 x 1440
Variable Refresh Rate
No VRR
Max Refresh Rate
60 Hz
Size
24"
Pixel Type
IPS
Native Resolution
2560 x 1440
Variable Refresh Rate
No
Our Verdict
Dell UltraSharp U2520D
Dell P2423D
The Dell UltraSharp U2520D and the Dell P2423D are both 1440p productivity monitors. The U2520D is the better choice for most people, as it's better at fighting glare, is able to display HDR content, and has a USB-C hub with power delivery.
Variants
- U2520D (25")
- P2423D (24")
Check Price
25"
U2520D
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24"
P2423D
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25"
U2520D
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24"
P2423D
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25"
U2520D
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24"
P2423D
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25"
U2520D
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24"
P2423D
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Main Differences for
Mixed Usage
Mixed Usage
Threshold
Mixed Usage
7.7
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Size
25"
24"
Weight (without stand)
9.3 lbs (4.2 kg)
7.5 lbs (3.4 kg)
Weight (with stand)
13.2 lbs (6.0 kg)
10.7 lbs (4.8 kg)
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
8.0
Build Quality Picture
Ergonomics
8.4
9.4
Ergonomics Picture
Back Picture
Height Adjustment
5.1" (13.0 cm)
5.9" (15.0 cm)
Min Height To Top Of Panel
13.4" (34.1 cm)
Tilt Range
-20° to 2.5°
-21° to 5°
Rotate Portrait/Landscape
Yes, Both Ways
Yes, Both Ways
Swivel Range
-45° to 45°
-45° to 45°
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
9.6" (24.4 cm)
9.6" (24.5 cm)
Base Depth
7.3" (18.5 cm)
6.9" (17.5 cm)
Thickness (With Display)
4.7" (12.0 cm)
5.7" (14.5 cm)
Weight (With Display)
13.2 lbs (6.0 kg)
10.7 lbs (4.8 kg)
Display
Display Picture
Size
25"
24"
Housing Width
21.2" (53.8 cm)
Housing Height
12.6" (32.0 cm)
Thickness (Without Stand)
2.0" (5.0 cm)
1.8" (4.5 cm)
Weight (Without Stand)
9.3 lbs (4.2 kg)
7.5 lbs (3.4 kg)
Borders Size (Bezels)
0.3" (0.7 cm)
0.2" (0.5 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
Internal
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.7 cm)
0.2" (0.5 cm)
Thickness
Thickness Picture
Thickness (with stand)
4.7" (12.0 cm)
5.7" (14.5 cm)
Thickness (without stand)
2.0" (5.0 cm)
1.8" (4.5 cm)
Picture Quality
Contrast
6.0
5.7
Checkerboard Picture
Native Contrast
1,010 : 1
842 : 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 Brightness
7.9
7.3
Real Scene
332 cd/m²
283 cd/m²
Peak 2% Window
350 cd/m²
268 cd/m²
Peak 10% Window
350 cd/m²
270 cd/m²
Peak 25% Window
351 cd/m²
271 cd/m²
Peak 50% Window
351 cd/m²
271 cd/m²
Peak 100% Window
351 cd/m²
271 cd/m²
Sustained 2% Window
349 cd/m²
268 cd/m²
Sustained 10% Window
350 cd/m²
270 cd/m²
Sustained 25% Window
350 cd/m²
270 cd/m²
Sustained 50% Window
351 cd/m²
271 cd/m²
Sustained 100% Window
351 cd/m²
271 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Minimum Brightness
36 cd/m²
HDR Brightness
6.7
0.0
EOTF
VESA DisplayHDR Certification
No Certification
Real Scene
385 cd/m²
N/A
Peak 2% Window
388 cd/m²
N/A
Peak 10% Window
436 cd/m²
N/A
Peak 25% Window
439 cd/m²
N/A
Peak 50% Window
442 cd/m²
N/A
Peak 100% Window
444 cd/m²
N/A
Sustained 2% Window
388 cd/m²
N/A
Sustained 10% Window
436 cd/m²
N/A
Sustained 25% Window
439 cd/m²
N/A
Sustained 50% Window
441 cd/m²
N/A
Sustained 100% Window
443 cd/m²
N/A
Automatic Brightness Limiting (ABL)
0.008
N/A
Horizontal Viewing Angle
8.2
7.9
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
43°
41°
Color Washout From Right
43°
42°
Horizontal Hue Graph
Color Shift From Left
49°
46°
Color Shift From Right
52°
54°
Horizontal Lightness Graph
Brightness Loss From Left
46°
48°
Brightness Loss From Right
46°
49°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
70°
Gamma Shift From Left
55°
39°
Gamma Shift From Right
57°
44°
Vertical Viewing Angle
6.6
7.8
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
31°
40°
Color Washout From Above
31°
39°
Vertical Hue Graph
Color Shift From Below
33°
50°
Color Shift From Above
32°
55°
Vertical Lightness Graph
Brightness Loss From Below
35°
43°
Brightness Loss From Above
34°
43°
Black Level Raise From Below
52°
70°
Black Level Raise From Above
54°
70°
Gamma Shift From Below
31°
39°
Gamma Shift From Above
32°
44°
Gray Uniformity
8.7
8.3
50% Uniformity Picture
50% Std. Dev.
3.014%
2.879%
50% DSE
0.110%
0.129%
5% Uniformity Picture
5% Std. Dev.
0.394%
5% DSE
0.055%
Black Uniformity
6.1
4.8
Native Black Uniformity Picture
Native Std. Dev.
1.965%
2.824%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Color Accuracy (Pre-Calibration)
8.0
7.5
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Color Space (sRGB)
Standard
sRGB Gamut Area xy
112.9%
White Balance dE (Avg.)
3.01
2.97
Color Temperature (Avg.)
6,606 K
6,814 K
Gamma (Avg.)
2.25
2.17
Color dE (Avg.)
1.99
2.31
Contrast Setting
75
75
RGB Settings
100-100-100
Default
Gamma Setting
No Gamma Setting
No Gamma Setting
Brightness Setting
21
75
Measured Brightness
75 cd/m²
197 cd/m²
Brightness Locked
No
Color Accuracy (Post-Calibration)
9.7
9.8
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom Color
sRGB Gamut Area xy
100.3%
White Balance dE (Avg.)
0.49
0.48
Color Temperature (Avg.)
6,470 K
6,484 K
Gamma (Avg.)
2.17
2.17
Color dE (Avg.)
0.40
0.29
Contrast Setting
75
75
RGB Settings
96-98-100
99-100-93
Gamma Setting
No Gamma Setting
No Gamma Setting
Brightness Setting
21
29
Measured Brightness
98 cd/m²
98 cd/m²
ICC Profile
SDR Color Gamut
9.1
9.3
sRGB Color Gamut Picture
sRGB Coverage xy
99.6%
99.9%
sRGB Picture Mode
Custom Color
Custom Color
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
82.4%
77.4%
Adobe RGB Picture Mode
Custom Color
Custom Color
HDR Color Gamut
7.0
0.0
Wide Color Gamut
Yes
N/A
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
N/A
DCI-P3 Picture Mode
Display HDR
No HDR
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
68.2%
N/A
Rec. 2020 Picture Mode
Display HDR
No HDR
DCI P3 xy
71.9%
HDR Color Volume
6.5
0.0
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
63.7%
N/A
DCI-P3 Picture Mode
Display HDR
No HDR
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
66.2%
N/A
Rec. 2020 Picture Mode
Display HDR
No HDR
Text Clarity
7.5
8.0
ClearType On
ClearType Off
Pixel Type
IPS
IPS
Pixels
Subpixel Layout
RGB
RGB
Reflections
6.4
7.7
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
7.3%
5.0%
Indirect Reflections
3.9%
3.0%
Calculated Direct Reflections
3.4%
1.9%
Gradient
8.4
8.5
Gradient Picture
Color Depth
8 Bit
8 Bit
SDR Color Volume
9.3
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.8%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
87.5%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color
Image Retention
10
Image Retention Picture
IR After 0 Min Recovery
0.00%
IR After 2 Min Recovery
0.00%
IR After 4 Min Recovery
0.00%
IR After 6 Min Recovery
0.00%
IR After 8 Min Recovery
0.00%
IR After 10 Min Recovery
0.00%
Color Bleed
10
Color Bleed Horizontal
Pixel Row Error
0.001%
Color Bleed Vertical
Pixel Column Error
0.009%
Motion
Refresh Rate
6.0
Native Refresh Rate
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Max Refresh Rate Over DP
60 Hz
Max Refresh Rate Over HDMI
60 Hz
Max Refresh Rate Over DP @ 10-bit
N/A
Max Refresh Rate Over HDMI @ 10-Bit
N/A
Variable Refresh Rate (VRR)
Variable Refresh Rate
No VRR
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
Native
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Variable Refresh Rate
No
VRR Motion Performance
5.0
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
No VRR
Variable Overdrive Advertised
No
Avg. CAD
400
Best CAD
400
Worst CAD
400
Refresh Rate Compliance
3.9
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
59%
Compliance @ 120 FPS
N/A
Compliance @ 60 FPS
59%
CAD @ Max Refresh Rate
4.4
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD fast
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
400
Best 10% CAD
211
Worst 10% CAD
663
Response Time @ Max Refresh Rate
First Response Time
6.3 ms
13.5 ms
Total Response Time
12.5 ms
14.1 ms
Recommended Overdrive Setting
Normal
Normal
RGB Overshoot
5.2%
0 RGB
Worst 10% RGB Overshoot
7.3%
4 RGB
Worst 10% First Response Time
7.0 ms
22.7 ms
Worst 10% Total Response Time
13.3 ms
23.6 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
Motion Blur Picture
Response Time Table
CAD @ 120Hz
0.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
Recommended Overdrive Setting
No 120Hz Refresh Rate
Avg. CAD
N/A
Best 10% CAD
N/A
Worst 10% CAD
N/A
Response Time @ 120Hz
Worst 10% First Response Time
N/A
RGB Overshoot
N/A
Total Response Time
N/A
First Response Time
N/A
Recommended Overdrive Setting
No 120Hz Refresh Rate
Worst 10% Total Response Time
N/A
Worst 10% RGB Overshoot
N/A
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
CAD @ 60Hz
4.4
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD fast
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
400
Best 10% CAD
211
Worst 10% CAD
663
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
Normal
First Response Time
6.3 ms
13.5 ms
Total Response Time
12.5 ms
14.1 ms
RGB Overshoot
5.2%
0 RGB
Worst 10% Total Response Time
13.3 ms
23.6 ms
Worst 10% First Response Time
7.0 ms
22.7 ms
Worst 10% RGB Overshoot
7.3%
4 RGB
60Hz First Response Heatmap
60Hz Total Response Heatmap
60Hz RGB Overshoot Heatmap
Backlight Strobing (BFI)
Backlight Strobing Picture
Backlight Strobing Frequency Picture
Backlight Strobing (BFI)
No BFI
No BFI
Maximum Frequency
N/A
N/A
Minimum Frequency
N/A
N/A
Longest Pulse Width Brightness
N/A
Shortest Pulse Width Brightness
N/A
Pulse Width Control
No BFI
Pulse Phase Control
No BFI
Pulse Amplitude Control
No BFI
VRR At The Same Time
No BFI
VRR Flicker
0.0
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
N/A
Middle Gray Flicker
N/A
Light Gray Flicker
N/A
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Response Time @ 60Hz
8.3
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
6.3 ms
13.5 ms
Total Response Time
12.5 ms
14.1 ms
Overshoot Error
5.2%
0 RGB
Dark Rise / Fall Time
7.0 ms
22.7 ms
Dark Total Response Time
13.3 ms
23.6 ms
Dark Overshoot Error
7.3%
4 RGB
Inputs
Input Lag
9.0
8.3
Native Resolution @ Max Hz
8.7 ms
8.6 ms
Native Resolution @ 120Hz
N/A
Native Resolution @ 60Hz
8.7 ms
8.6 ms
Variable Refresh Rate
N/A
Variable Refresh Rate @ 60Hz
N/A
10 Bit HDR
N/A
Backlight Strobing (BFI)
N/A
N/A
Resolution
8.3
7.7
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
123 PPI
Screen Diagonal
25.0"
Screen Area
268 in²
PS5 Compatibility
1.0
PS5 Compatibility Photo
PS5 Compatibility Table
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
No
1080p @ 60Hz
Yes
Xbox Series X|S Compatibility
1.3
XSX Compatibility Photo
XSX Compatibility Table
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
No
1080p @ 60Hz
Yes
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.4)
1 (DP 1.4)
DisplayPort Transmission Bandwidth
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
1 (HDMI 2.0)
1 (HDMI 2.0)
HDMI 2.1 Bandwidth
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
3.5mm Audio Out
1
No
3.5mm Audio In
No
3.5mm Microphone In
No
No
DisplayPort Out
1 (DP 1.4)
USB
3 (USB 3.0)
4
USB C
2 (1x USB, USB PD, DP Alt Mode, 1x USB 3 Amp))
0
Digital Optical Audio Out
No
Analog Audio Out RCA
No
Power Supply
Internal
Internal
USB
USB-A Ports
3 (USB 3.0)
4
USB-A Rated Speed
5Gbps (USB 3.2 Gen 1)
USB-B Upstream Port
Yes
USB-C Ports
2 (1x USB, USB PD, DP Alt Mode, 1x USB 3 Amp))
0
USB-C Upstream
No USB-C Ports
USB-C Rated Speed
No USB-C Ports
USB-C Power Delivery
No USB-C Ports
USB-C DisplayPort Alt Mode
No USB-C Ports
Thunderbolt
No
macOS Compatibility
macOS Screenshot
Features
Additional Features
HDR10
Yes
No
Speakers
No
No
RGB Illumination
No
No
Multiple Input Display
No
No
KVM Switch
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
24"
P2423D
SEE PRICE
B&H
25"
U2520D
SEE PRICE
BestBuy.com
24"
P2423D
SEARCH
Amazon.com
25"
U2520D
SEE PRICE
Walmart.com
24"
P2423D
SEARCH
BestBuy.com
25"
U2520D
SEARCH
B&H
24"
P2423D
SEARCH
Walmart.com
Dell UltraSharp U2520D
Dell P2423D
Comments
Dell UltraSharp U2520D vs Dell P2423D: Main Discussion
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