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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
Dell UltraSharp U2720Q vs Dell S2721QS
Side-by-Side Comparison
Products
Dell UltraSharp U2720Q
Dell S2721QS
Tested using Methodology v1.2
Updated Apr 15, 2024 02:43 PM
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Amazon.comTested using Methodology v2.0.1
Updated Apr 24, 2025 05:20 PM
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Max Refresh Rate60 Hz
Size27"
Pixel TypeIPS
Native Resolution3840 x 2160
Variable Refresh RateNo
HDR10Yes
Max Refresh Rate60 Hz
Size27"
Pixel TypeIPS
Native Resolution3840 x 2160
Variable Refresh RateYes
HDR10Yes
Variants
- U2720Q (27")
- S2721QS (27")
Our Verdict
Dell UltraSharp U2720Q
Dell S2721QS
The Dell S2721QS is a bit better than the Dell UltraSharp U2720Q for most uses. The S2721QS has higher peak brightness and better reflection handling, and it supports variable refresh rate technology to reduce screen tearing when gaming. However, the U2720Q has better ergonomics and more connectivity options, including a USB-C port that supports DisplayPort Alt Mode.
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U2720Q
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S2721QS
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S2721QS
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.6
Full Comparison
Design
Style
Design Picture
Curved
No
No
Curve Radius
Not Curved
Not Curved
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Build Quality
7.5
7.5
Build Quality Picture
Ergonomics
9.2
8.8
Ergonomics Picture
Back Picture
Height Adjustment
5.1" (13.0 cm)
4.3" (11.0 cm)
Min Height To Top Of Panel
15.4" (39.0 cm)
Tilt Range
-20° to 5°
-20° to 2.5°
Rotate Portrait/Landscape
Yes, Both Ways
Yes, Both Ways
Swivel Range
-45° to 45°
-30° to 30°
Wall Mount
VESA 100x100
VESA 100x100
Stand
Stand Picture
Thickness Picture
Base Width
9.6" (24.5 cm)
10.2" (25.9 cm)
Base Depth
7.3" (18.5 cm)
6.9" (17.6 cm)
Thickness (With Display)
5.0" (12.8 cm)
5.1" (13.0 cm)
Weight (With Display)
13.7 lbs (6.2 kg)
13.9 lbs (6.3 kg)
Display
Display Picture
Size
27"
27"
Housing Width
24.1" (61.1 cm)
24.1" (61.2 cm)
Housing Height
14.0" (35.5 cm)
14.3" (36.3 cm)
Thickness (Without Stand)
2.0" (5.0 cm)
2.0" (5.2 cm)
Weight (Without Stand)
9.8 lbs (4.4 kg)
10.6 lbs (4.8 kg)
Borders Size (Bezels)
0.3" (0.7 cm)
0.3" (0.7 cm)
Controls
Controls Picture
In The Box
In The Box Picture
Power Supply
Internal
Internal
Picture Quality
Contrast
6.0
6.3
Checkerboard Picture
Native Contrast
1,121 : 1
1,221 : 1
Contrast With Local Dimming
619 : 1
N/A
Local Dimming
1.5
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Edge
SDR Brightness
7.7
8.0
Real Scene
307 cd/m²
362 cd/m²
Peak 2% Window
316 cd/m²
369 cd/m²
Peak 10% Window
317 cd/m²
370 cd/m²
Peak 25% Window
318 cd/m²
371 cd/m²
Peak 50% Window
318 cd/m²
373 cd/m²
Peak 100% Window
318 cd/m²
374 cd/m²
Sustained 2% Window
316 cd/m²
368 cd/m²
Sustained 10% Window
317 cd/m²
369 cd/m²
Sustained 25% Window
317 cd/m²
371 cd/m²
Sustained 50% Window
318 cd/m²
372 cd/m²
Sustained 100% Window
318 cd/m²
373 cd/m²
Automatic Brightness Limiting (ABL)
0.000
0.001
Minimum Brightness
29 cd/m²
32 cd/m²
HDR Brightness
6.8
6.6
EOTF
VESA DisplayHDR Certification
DisplayHDR 400 - 1.0/1.1
No Certification
Real Scene
442 cd/m²
370 cd/m²
Peak 2% Window
221 cd/m²
387 cd/m²
Peak 10% Window
454 cd/m²
386 cd/m²
Peak 25% Window
457 cd/m²
386 cd/m²
Peak 50% Window
459 cd/m²
385 cd/m²
Peak 100% Window
460 cd/m²
385 cd/m²
Sustained 2% Window
220 cd/m²
386 cd/m²
Sustained 10% Window
454 cd/m²
386 cd/m²
Sustained 25% Window
456 cd/m²
385 cd/m²
Sustained 50% Window
459 cd/m²
385 cd/m²
Sustained 100% Window
458 cd/m²
384 cd/m²
Automatic Brightness Limiting (ABL)
0.043
0.000
Horizontal Viewing Angle
7.9
8.1
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
39°
40°
Color Washout From Right
43°
44°
Horizontal Hue Graph
Color Shift From Left
52°
58°
Color Shift From Right
58°
62°
Horizontal Lightness Graph
Brightness Loss From Left
42°
44°
Brightness Loss From Right
47°
48°
Black Level Raise From Left
70°
70°
Black Level Raise From Right
70°
70°
Gamma Shift From Left
39°
42°
Gamma Shift From Right
44°
44°
Vertical Viewing Angle
8.0
8.3
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
31°
35°
Color Washout From Above
38°
37°
Vertical Hue Graph
Color Shift From Below
40°
61°
Color Shift From Above
50°
62°
Vertical Lightness Graph
Brightness Loss From Below
33°
38°
Brightness Loss From Above
41°
38°
Black Level Raise From Below
70°
70°
Black Level Raise From Above
70°
70°
Gamma Shift From Below
64°
60°
Gamma Shift From Above
70°
67°
Gray Uniformity
7.9
7.8
50% Uniformity Picture
50% Std. Dev.
3.435%
4.171%
50% DSE
0.139%
0.142%
Black Uniformity
6.2
7.1
Native Black Uniformity Picture
Native Std. Dev.
1.740%
1.208%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
2.721%
N/A
Color Accuracy (Pre-Calibration)
8.6
7.0
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Color Space (sRGB)
Custom Color
sRGB Gamut Area xy
97.3%
116.9%
White Balance dE (Avg.)
2.80
3.02
Color Temperature (Avg.)
7,124 K
6,926 K
Gamma (Avg.)
2.10
2.39
Color dE (Avg.)
2.16
3.15
Contrast Setting
75
75
RGB Settings
Default
100-100-100
Gamma Setting
No Gamma Setting
No Gamma Setting
Brightness Setting
75
75
Measured Brightness
251 cd/m²
334 cd/m²
Brightness Locked
No
No
Color Accuracy (Post-Calibration)
9.7
9.6
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom Color
sRGB Gamut Area xy
101.2%
102.5%
White Balance dE (Avg.)
0.54
0.59
Color Temperature (Avg.)
6,475 K
6,535 K
Gamma (Avg.)
2.18
2.17
Color dE (Avg.)
0.36
0.57
Contrast Setting
70
71
RGB Settings
100-96-97
100-97-97
Gamma Setting
No Gamma Setting
No Gamma Setting
Brightness Setting
26
20
Measured Brightness
100 cd/m²
99 cd/m²
SDR Color Gamut
9.4
9.4
sRGB Color Gamut Picture
sRGB Coverage xy
99.3%
100.0%
sRGB Picture Mode
Custom Color
Custom Color
Adobe RGB Color Gamut Picture
Adobe RGB Coverage xy
83.3%
80.5%
Adobe RGB Picture Mode
Custom Color
Custom Color
HDR Color Gamut
8.8
7.2
Wide Color Gamut
Yes
Yes
DCI-P3 Color Gamut Picture
DCI-P3 Coverage xy
95.2%
85.2%
DCI-P3 Picture Mode
Display HDR
Desktop
Rec. 2020 Color Gamut Picture
Rec. 2020 Coverage xy
66.7%
61.1%
Rec. 2020 Picture Mode
Display HDR
Desktop
HDR Color Volume
7.2
6.7
DCI-P3 Color Volume ITP Picture
1,000 cd/m² DCI-P3 Coverage ICtCp
72.5%
56.3%
DCI-P3 Picture Mode
Display HDR
Desktop
Rec. 2020 Color Volume ITP Picture
10,000 cd/m² Rec. 2020 Coverage ICtCp
65.9%
24.1%
Rec. 2020 Picture Mode
Display HDR
Desktop
Text Clarity
9.0
9.0
ClearType On
ClearType Off
Pixel Type
IPS
IPS
Pixels
Subpixel Layout
RGB
RGB
Reflections
6.4
7.8
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
7.5%
4.5%
Indirect Reflections
4.2%
2.5%
Calculated Direct Reflections
3.3%
2.0%
Gradient
9.2
9.8
Gradient Picture
Color Depth
10 Bit
10 Bit
SDR Color Volume
9.6
sRGB Color Volume ITP Picture
sRGB In ICtCp
97.5%
sRGB Picture Mode
Custom Color
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
88.9%
Adobe RGB Picture Mode
Custom Color
Motion
Refresh Rate
6.0
6.0
Native Refresh Rate
60 Hz
60 Hz
Max Refresh Rate
60 Hz
60 Hz
Max Refresh Rate Over DP
60 Hz
60 Hz
Max Refresh Rate Over HDMI
60 Hz
60 Hz
Max Refresh Rate Over DP @ 10-bit
60 Hz
60 Hz
Max Refresh Rate Over HDMI @ 10-Bit
30 Hz
30 Hz
Variable Refresh Rate (VRR)
Variable Refresh Rate
No
Yes
FreeSync
No
Yes
G-SYNC
No
Compatible (Tested)
VRR Maximum
N/A
60 Hz
VRR Minimum
No VRR
40 Hz
VRR Supported Connectors
No VRR
DisplayPort
VRR Motion Performance
5.3
Pursuit Photo VRR
OD Mode CAD Comparison
Recommended VRR OD Setting
Normal
Variable Overdrive Advertised
No
Avg. CAD
373
Best CAD
373
Worst CAD
373
Refresh Rate Compliance
3.9
Fast GTG Sequence
VRR Compliance
Compliance @ Max Hz
59%
Compliance @ 120 FPS
N/A
Compliance @ 60 FPS
59%
Response Time @ 60Hz
5.7
Motion Blur Picture
Response Time Table
Recommended Overdrive Setting
Normal
Normal
Rise / Fall Time
8.1 ms
15.2 ms
Total Response Time
18.8 ms
15.2 ms
Overshoot Error
4.3%
0 RGB
Worst 3 Rise / Fall Time
10.2 ms
25.0 ms
Worst 3 Total Response Time
34.3 ms
25.0 ms
Worst 3 Overshoot Error
22.0%
0 RGB
CAD @ Max Refresh Rate
4.8
Pursuit Photo At Max Refresh
CAD Heatmap At Max Refresh
OD Transition Max Refresh Rate
OD extreme
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
373
Best 10% CAD
215
Worst 10% CAD
583
Response Time @ Max Refresh Rate
First Response Time
8.1 ms
15.2 ms
Total Response Time
18.8 ms
15.2 ms
Recommended Overdrive Setting
Normal
Normal
Motion Blur Picture
RGB Overshoot
4.3%
0 RGB
Worst 10% RGB Overshoot
22.0%
0 RGB
Worst 10% First Response Time
10.2 ms
25.0 ms
Worst 10% Total Response Time
34.3 ms
25.0 ms
Heatmap First Response
Heatmap Total Response
Heatmap RGB Overshoot
Response Time Table
CAD @ 120Hz
0.0
Pursuit Photo 120Hz
CAD Heatmap 120Hz
OD Transition 120Hz
-
0 to 31
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
N/A
RGB Overshoot
N/A
N/A
Total Response Time
N/A
N/A
First Response Time
N/A
N/A
Recommended Overdrive Setting
No 120Hz Refresh Rate
No 120Hz Refresh Rate
Worst 10% Total Response Time
N/A
N/A
Worst 10% RGB Overshoot
N/A
N/A
120Hz First Response Heatmap
120Hz Total Response Heatmap
120Hz Heatmap RGB Overshoot
Motion Blur Picture
Response Time Table
CAD @ 60Hz
4.8
Pursuit Photo 60Hz
CAD Heatmap 60Hz
OD Transition 60Hz
OD extreme
0 to 31
Recommended Overdrive Setting
Normal
Avg. CAD
373
Best 10% CAD
215
Worst 10% CAD
583
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
Normal
First Response Time
8.1 ms
15.2 ms
Total Response Time
18.8 ms
15.2 ms
RGB Overshoot
4.3%
0 RGB
Worst 10% Total Response Time
34.3 ms
25.0 ms
Worst 10% First Response Time
10.2 ms
25.0 ms
Worst 10% RGB Overshoot
22.0%
0 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
N/A
Shortest Pulse Width Brightness
N/A
N/A
Pulse Width Control
No BFI
No BFI
Pulse Phase Control
No BFI
No BFI
Pulse Amplitude Control
No BFI
No BFI
VRR At The Same Time
No BFI
No BFI
VRR Flicker
9.4
VRR Flicker Video
VRR Flicker Graph
Dark Gray Flicker
0.5 RGB
Middle Gray Flicker
0.3 RGB
Light Gray Flicker
0.1 RGB
Image Flicker
10
10
Backlight Picture
Flicker-Free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Inputs
Input Lag
8.2
8.3
Native Resolution @ Max Hz
9.3 ms
8.7 ms
Native Resolution @ 120Hz
N/A
N/A
Native Resolution @ 60Hz
9.3 ms
8.7 ms
Backlight Strobing (BFI)
N/A
N/A
Resolution
9.0
8.8
Native Resolution
3840 x 2160
3840 x 2160
Aspect Ratio
16:9
16:9
Megapixels
8.3 MP
8.3 MP
Pixel Density
164 PPI
163 PPI
Measured Screen Diagonal
27.0"
Screen Area
310 in²
PS5 Compatibility
6.0
2.3
PS5 Compatibility Photo
PS5 Compatibility Table
4k @ 120Hz
No
No
4k @ 60Hz
Yes
Yes
1440p @ 120Hz
No
No
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
No
No
1080p @ 60Hz
Yes
Yes
HDR
Yes
VRR
No
Xbox Series X|S Compatibility
5.8
3.9
XSX Compatibility Photo
XSX Compatibility Table
4k @ 120Hz
No
No
4k @ 60Hz
Yes
Yes
1440p @ 120Hz
No
No
1440p @ 60Hz
Yes
Yes
1080p @ 120Hz
No
No
1080p @ 60Hz
Yes
Yes
HDR
Yes
VRR
No
Inputs Photos
Inputs 1
Inputs 2
Video And Audio Ports
DisplayPort
1 (DP 1.4)
1 (DP 1.2)
DisplayPort Transmission Bandwidth
No DisplayPort 2.1
Mini DisplayPort
No
No
HDMI
1 (HDMI 2.0)
2 (HDMI 2.0)
HDMI 2.1 Bandwidth
No HDMI 2.1
No HDMI 2.1
DVI
No
No
VGA
No
No
Daisy Chaining
No
No
3.5mm Audio Out
1
1
HDR10
Yes
Yes
3.5mm Audio In
No
No
3.5mm Microphone In
No
No
USB
USB-A Ports
3
0
USB-A Rated Speed
5Gbps (USB 3.2 Gen 1)
No USB-A Ports
USB-B Upstream Port
No
No
USB-C Ports
2
0
USB-C Upstream
Yes
No USB-C Ports
USB-C Rated Speed
5Gbps (USB 3.2 Gen 1)
No USB-C Ports
USB-C Power Delivery
90W
No USB-C Ports
USB-C DisplayPort Alt Mode
Yes
No USB-C Ports
Thunderbolt
No
No
macOS Compatibility
macOS Screenshot
Features
Additional Features
Speakers
No
Yes
RGB Illumination
No
No
Multiple Input Display
No
PIP + PBP
KVM Switch
No
No
On-Screen Display (OSD)
OSD Picture
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27"
U2720Q
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Amazon.com27"
S2721QS
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S2721QS
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S2721QS
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S2721QS
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S2721QS
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Dell UltraSharp U2720Q
Dell S2721QS
Comments
Dell UltraSharp U2720Q vs Dell S2721QS: Main Discussion
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