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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
Dell U2717D vs Dell S2721D
Side-by-Side Comparison
Products
Dell U2717D
Dell S2721D
Tested using Methodology v1.0
Updated May 29, 2023 03:07 PM
SEE PRICE
Amazon.comTested using Methodology v1.1
Updated Apr 02, 2024 07:57 PM
Unavailable
Missing store
Size27"
Pixel TypeIPS
Variable Refresh RateNo
Native Resolution2560 x 1440
Max Refresh Rate60 Hz
Size27"
Pixel TypeIPS
Variable Refresh RateFreeSync
Native Resolution2560 x 1440
Max Refresh Rate75 Hz
Variants
- U2717D (27")
- S2721D (27")
Our Verdict
Dell U2717D
Dell S2721D
The Dell S2721D is better than the Dell U2717D for most uses. The S2721D has significantly lower input lag, higher refresh rate, and much better reflection handling. It also has a better color gamut and gradient handling, and it supports variable refresh rate. The U2717D has much better ergonomics, as it allows for height and swivel adjustments, and can rotate to portrait mode.
Check Price
27"
U2717D
SEE PRICE
Amazon.com27"
S2721D
Searching
Finding store27"
S2721D
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Finding store27"
S2721D
Searching
Finding store27"
S2721D
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Finding store27"
S2721D
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Finding storeNotice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our monitors test methodology.
Main Differences for
Threshold
Mixed Usage
7.1
7.3
Ergonomics
8.3
1.5
Vertical Viewing Angle
7.0
9.2
Input Lag
6.6
9.1
Black Uniformity
3.6
6.7
Full Comparison
Design
Style
Design Picture
Size
27"
27"
Curved
No
No
Curve Radius
N/A
Not Curved
Weight (without stand)
9.9 lbs (4.5 kg)
8.2 lbs (3.7 kg)
Weight (with stand)
15.4 lbs (7.0 kg)
9.7 lbs (4.4 kg)
Stand
Stand Picture
Width
11.5" (29.2 cm)
9.9" (25.1 cm)
Depth
7.8" (19.8 cm)
7.0" (17.7 cm)
Ergonomics
8.3
1.5
Ergonomics Picture
Height Adjustment
5.1" (13.0 cm)
0.0" (0.0 cm)
Switch Portrait/Landscape
Yes
No
Swivel Range
-45° to 45°
No swivel
Tilt Range
-20° to 5°
-21° to 5°
Back
Back Picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders Picture
Borders
0.3" (0.8 cm)
0.2" (0.6 cm)
Thickness
Thickness Picture
Thickness (with stand)
5.5" (14.0 cm)
5.0" (12.6 cm)
Thickness (without stand)
1.7" (4.3 cm)
1.9" (4.8 cm)
Build Quality
7.5
7.5
Build Quality Picture
Picture Quality
Contrast
6.0
6.0
Checkerboard Picture
LCD Type
IPS
IPS
Native Contrast
986 : 1
1,015 : 1
Contrast With Local Dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming Video
Local Dimming
No
No
Backlight
Direct
Edge
SDR Peak Brightness
7.6
7.8
SDR Real Scene
298 cd/m²
316 cd/m²
SDR Peak 2% Window
309 cd/m²
332 cd/m²
SDR Peak 10% Window
311 cd/m²
334 cd/m²
SDR Peak 25% Window
307 cd/m²
334 cd/m²
SDR Peak 50% Window
307 cd/m²
334 cd/m²
SDR Peak 100% Window
308 cd/m²
334 cd/m²
SDR Sustained 2% Window
307 cd/m²
331 cd/m²
SDR Sustained 10% Window
310 cd/m²
333 cd/m²
SDR Sustained 25% Window
307 cd/m²
333 cd/m²
SDR Sustained 50% Window
304 cd/m²
334 cd/m²
SDR Sustained 100% Window
304 cd/m²
334 cd/m²
SDR ABL
0.001
0.000
HDR Peak Brightness
0.0
0.0
HDR Real Scene
N/A
N/A
HDR Peak 2% Window
N/A
N/A
HDR Peak 10% Window
N/A
N/A
HDR Peak 25% Window
N/A
N/A
HDR Peak 50% Window
N/A
N/A
HDR Peak 100% Window
N/A
N/A
HDR Sustained 2% Window
N/A
N/A
HDR Sustained 10% Window
N/A
N/A
HDR Sustained 25% Window
N/A
N/A
HDR Sustained 50% Window
N/A
N/A
HDR Sustained 100% Window
N/A
N/A
HDR ABL
N/A
N/A
Horizontal Viewing Angle
7.2
7.8
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
46°
Color Washout From Right
42°
Horizontal Color Shift Picture
Horizontal Hue Graph
Color Shift From Left
34°
54°
Color Shift From Right
37°
63°
Horizontal Brightness Picture
Horizontal Black Level Picture
Horizontal Lightness Graph
Brightness Loss From Left
44°
52°
Brightness Loss From Right
47°
51°
Black Level Raise From Left
75°
70°
Black Level Raise From Right
75°
30°
Curve Radius
N/A
Gamma Shift From Left
44°
Gamma Shift From Right
39°
Vertical Viewing Angle
7.0
9.2
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
50°
Color Washout From Above
59°
Vertical Color Shift Picture
Vertical Hue Graph
Color Shift From Below
27°
64°
Color Shift From Above
23°
60°
Vertical Brightness Picture
Vertical Black Level Picture
Vertical Lightness Graph
Brightness Loss From Below
34°
54°
Brightness Loss From Above
31°
58°
Black Level Raise From Below
75°
70°
Black Level Raise From Above
24°
70°
Gamma Shift From Below
67°
Gamma Shift From Above
70°
Gray Uniformity
8.5
8.9
50% Uniformity Picture
50% Std. Dev.
3.499%
2.217%
50% DSE
0.114%
0.090%
5% Uniformity Picture
5% Std. Dev.
0.565%
0.261%
5% DSE
0.064%
0.047%
Black Uniformity
3.6
6.7
Native Black Uniformity Picture
Native Std. Dev.
3.611%
1.489%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
7.2
6.2
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Custom Color
Custom Color
Luminance
276 cd/m²
385 cd/m²
Luminance Settings
75
100
Contrast Setting
75
75
RGB Controls
100-100-100
100-100-100
Gamma Setting
No Gamma Setting
Color Temperature
7,230 K
5,806 K
White Balance dE
3.75
4.59
Color dE
2.75
3.60
Gamma
2.23
2.17
Post Calibration
9.0
9.6
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom Color
Luminance
96 cd/m²
100 cd/m²
Luminance Settings
22
21
Contrast Setting
74
75
RGB Controls
100-95-94
92-94-100
Gamma Setting
No Gamma Setting
Color Temperature
6,299 K
6,543 K
White Balance dE
1.64
0.78
Color dE
1.02
0.48
Gamma
2.19
2.18
SDR Color Gamut
8.8
8.8
Color Gamut sRGB Picture
sRGB xy
99.2%
98.6%
Color Gamut ARGB Picture
Adobe RGB xy
75.6%
76.4%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color
SDR Color Volume
8.3
9.0
sRGB Color Volume ITP Picture
sRGB In ICtCp
88.5%
97.4%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
75.9%
82.3%
sRGB Picture Mode
Custom Color
Adobe RGB Picture Mode
Custom Color
HDR Color Gamut
0.0
0.0
Wide Color Gamut
No
N/A
Color Gamut DCI-P3 Picture
DCI P3 xy
N/A
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
N/A
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR
HDR Color Volume
0.0
0.0
P3 Color Volume ITP Picture
DCI-P3 In ICtCp
N/A
N/A
2020 Color Volume ITP Picture
Rec. 2020 In ICtCp
N/A
N/A
DCI P3 Picture Mode
No HDR
Rec. 2020 Picture Mode
No HDR
Image Retention
10
9.7
Image Retention Picture
IR After 0 Min Recovery
0.00%
0.08%
IR After 2 Min Recovery
0.00%
0.01%
IR After 4 Min Recovery
0.00%
0.02%
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
8.1
8.6
Gradient Picture
Color Depth
8 Bit
8 Bit
Color Bleed
10
10
Color Bleed Horizontal
Pixel Row Error
0.000%
0.000%
Color Bleed Vertical
Pixel Column Error
0.000%
0.000%
Reflections
7.5
8.4
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Total Reflections
4.3%
Indirect Reflections
3.8%
Calculated Direct Reflections
0.5%
Text Clarity
7.0
ClearType On
Pixel Type
IPS
IPS
ClearType Off
Pixels
Sub-Pixel Layout
RGB
Motion
Response Time @ Max Refresh Rate
8.6
7.0
Motion Blur Picture
Motion Blur Picture
Response Time Chart
Response Time Table
Best Overdrive Setting
Normal
Normal
Rise / Fall Time
4.7 ms
9.8 ms
Total Response Time
15.7 ms
17.4 ms
Overshoot Error
0.0%
Dark Rise / Fall Time
11.8 ms
Dark Total Response Time
19.8 ms
Dark Overshoot Error
0.0%
Response Time @ 60Hz
7.3
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Rise / Fall Time
9.5 ms
Total Response Time
16 ms
Overshoot Error
0.1%
Dark Rise / Fall Time
11.8 ms
Dark Total Response Time
18.2 ms
Dark Overshoot Error
0.0%
Image Flicker
7.5
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Black Frame Insertion (BFI)
No
No BFI
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Black Frame Insertion (BFI)
0.0
Black Frame Insertion (BFI)
No
No BFI
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
6.7
7.7
Variable Refresh Rate
No
FreeSync
Native
75 Hz
Max Refresh Rate
60 Hz
75 Hz
Factory Overclock
N/A
Variable Refresh Rate
No
Yes
FreeSync
Yes
G-SYNC
No
Compatible (Tested)
VRR Maximum
N/A
75 Hz
VRR Minimum
N/A
48 Hz
VRR Maximum With OC
N/A
VRR Supported Connectors
N/A
DisplayPort, HDMI
Inputs
Input Lag
6.6
9.1
Native Resolution
33.4 ms
6.9 ms
Non-Native Res @ Native Refresh
8.8 ms
Native Resolution @ 60Hz
33.4 ms
8.6 ms
Variable Refresh Rate
N/A
7.7 ms
Variable Refresh Rate @ 60Hz
9.4 ms
10 Bit HDR
N/A
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
8.4
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
109 PPI
109 PPI
Screen Diagonal
26.9"
27.0"
Screen Area
310 in²
310 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
Mini DisplayPort
1 (DP 1.2)
No
HDMI
1 (HDMI 1.4)
2 (HDMI 1.4)
DVI
No
No
VGA
No
No
DisplayPort Out
1 (DP 1.2)
No
USB
4 (USB 3.0)
No
USB C
No
No
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
Speakers
No
Yes
HDR10
No
No
Multiple Input Display
No
No
On-Screen Display (OSD)
OSD Picture
Controls
Controls Picture
In The Box
In The Box Picture
Check Price
27"
U2717D
SEE PRICE
Amazon.com27"
S2721D
Searching
Finding store27"
S2721D
Searching
Finding store27"
S2721D
Searching
Finding store27"
S2721D
Searching
Finding store27"
S2721D
Searching
Finding store
Dell U2717D
Dell S2721D
Comments
Dell U2717D vs Dell S2721D: Main Discussion
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