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Products
Dell UltraSharp U2721DE
Samsung T55
Tested using Methodology v1.1
Updated Dec 14, 2023 04:44 PM
SEE PRICE
Amazon.comTested using Methodology v1.1
Updated Dec 16, 2022 04:26 PM
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Amazon.com
Size27"
Pixel TypeIPS
Variable Refresh RateNo VRR
Native Resolution2560 x 1440
Max Refresh Rate60 Hz
Size32"
Pixel TypeVA
Variable Refresh RateFreeSync
Native Resolution1920 x 1080
Max Refresh Rate75 Hz
Our Verdict
Dell UltraSharp U2721DE
Samsung T55
The Dell UltraSharp U2721DE is better than the Samsung T55. The Dell has a native 1440p resolution, excellent ergonomics, wide viewing angles, decent out-of-the-box color accuracy, and it also has a quicker response time. The Samsung has more gaming features like a slightly lower input lag and FreeSync VRR support. It also has a VA panel that displays deep blacks and its SDR color gamut is wider too.
Variants
- UltraSharp U2721DE (27")
- LC24T55 (24")
- LC27T55 (27")
- LC32T55 (32")
Check Price
27"
UltraSharp U2721DE
SEE PRICE
Amazon.com27"
LC27T55
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Amazon.com27"
UltraSharp U2721DE
SEE PRICE
BestBuy.com24"
LC24T55
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Amazon.com27"
UltraSharp U2721DE
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Walmart.com32"
LC32T55
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Amazon.com27"
UltraSharp U2721DE
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B&HMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.4
6.7
Ergonomics
8.5
1.5
Resolution And Size
8.3
7.1
Vertical Viewing Angle
7.6
5.7
Horizontal Viewing Angle
7.4
6.0
Full Comparison
Design
Style
Design Picture
Size
27"
32"
Curved
No
Yes
Curve Radius
Not Curved
1000R
Weight (without stand)
8.9 lbs (4.0 kg)
10.6 lbs (4.8 kg)
Weight (with stand)
12.6 lbs (5.7 kg)
13.9 lbs (6.3 kg)
Stand
Stand Picture
Width
9.1" (23.0 cm)
9.4" (24.0 cm)
Depth
7.1" (18.0 cm)
10.7" (27.3 cm)
Ergonomics
8.5
1.5
Ergonomics Picture
Height Adjustment
5.1" (13.0 cm)
0.0" (0.0 cm)
Switch Portrait/Landscape
Yes, Both Ways
No
Swivel Range
-40° to 40°
No swivel
Tilt Range
-20° to 5°
-20° to 5°
Back
Back Picture
Wall Mount
VESA 100x100
No Mount
Borders
Borders Picture
Borders
0.2" (0.6 cm)
0.4" (1.1 cm)
Thickness
Thickness Picture
Thickness (with stand)
5.0" (12.8 cm)
9.5" (24.1 cm)
Thickness (without stand)
1.5" (3.8 cm)
5.1" (13.0 cm)
Build Quality
7.5
7.0
Build Quality Picture
Picture Quality
Contrast
6.0
8.0
Checkerboard Picture
Native Contrast
1,014 : 1
3,174 : 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
7.7
7.6
SDR Real Scene
314 cd/m²
301 cd/m²
SDR Peak 2% Window
347 cd/m²
317 cd/m²
SDR Peak 10% Window
348 cd/m²
317 cd/m²
SDR Peak 25% Window
348 cd/m²
318 cd/m²
SDR Peak 50% Window
349 cd/m²
317 cd/m²
SDR Peak 100% Window
349 cd/m²
317 cd/m²
SDR Sustained 2% Window
347 cd/m²
317 cd/m²
SDR Sustained 10% Window
348 cd/m²
317 cd/m²
SDR Sustained 25% Window
348 cd/m²
317 cd/m²
SDR Sustained 50% Window
349 cd/m²
317 cd/m²
SDR Sustained 100% Window
349 cd/m²
317 cd/m²
SDR ABL
0.000
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
7.4
6.0
Horizontal Viewing Angle Video
Horizontal Chroma Graph
Color Washout From Left
39°
28°
Color Washout From Right
39°
30°
Horizontal Hue Graph
Color Shift From Left
48°
60°
Color Shift From Right
47°
62°
Horizontal Lightness Graph
Brightness Loss From Left
45°
29°
Brightness Loss From Right
46°
31°
Black Level Raise From Left
70°
14°
Black Level Raise From Right
41°
15°
Gamma Shift From Left
39°
21°
Gamma Shift From Right
38°
20°
Vertical Viewing Angle
7.6
5.7
Vertical Viewing Angle Video
Vertical Chroma Graph
Color Washout From Below
32°
27°
Color Washout From Above
34°
29°
Vertical Hue Graph
Color Shift From Below
41°
55°
Color Shift From Above
43°
56°
Vertical Lightness Graph
Brightness Loss From Below
34°
30°
Brightness Loss From Above
36°
31°
Black Level Raise From Below
70°
11°
Black Level Raise From Above
70°
11°
Gamma Shift From Below
44°
16°
Gamma Shift From Above
63°
18°
Gray Uniformity
8.7
8.8
50% Uniformity Picture
50% Std. Dev.
2.436%
2.596%
50% DSE
0.115%
0.107%
5% Uniformity Picture
5% Std. Dev.
0.279%
0.725%
5% DSE
0.041%
0.065%
Black Uniformity
7.1
5.6
Native Black Uniformity Picture
Native Std. Dev.
1.219%
2.274%
Black Uniformity Picture With Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
7.1
4.7
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Standard
Standard
Luminance
103 cd/m²
220 cd/m²
Luminance Settings
22
55
Contrast Setting
78
75
RGB Controls
100-100-100
50-50-50
Gamma Setting
No Gamma Setting
1
Color Temperature
5,949 K
5,876 K
White Balance dE
3.53
6.05
Color dE
3.19
4.61
Gamma
2.24
2.16
Post Calibration
9.7
9.6
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom
Luminance
101 cd/m²
102 cd/m²
Luminance Settings
23
24
Contrast Setting
78
75
RGB Controls
94-92-100
41-40-52
Gamma Setting
No Gamma Setting
1
Color Temperature
6,489 K
6,543 K
White Balance dE
0.40
0.44
Color dE
0.52
0.65
Gamma
2.17
2.19
SDR Color Gamut
8.6
9.1
Color Gamut sRGB Picture
sRGB xy
96.8%
98.9%
Color Gamut ARGB Picture
Adobe RGB xy
75.3%
82.1%
sRGB Picture Mode
Custom Color
Custom
Adobe RGB Picture Mode
Custom Color
Custom
SDR Color Volume
8.9
9.4
sRGB Color Volume ITP Picture
sRGB In ICtCp
96.6%
99.0%
Adobe RGB Color Volume ITP Picture
Adobe RGB In ICtCp
81.4%
89.2%
sRGB Picture Mode
Custom Color
Custom
Adobe RGB Picture Mode
Custom Color
Custom
HDR Color Gamut
0.0
0.0
Wide Color Gamut
N/A
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
No HDR
Rec. 2020 Picture Mode
No HDR
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
No HDR
Rec. 2020 Picture Mode
No 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
7.8
8.0
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
0.002%
0.001%
Reflections
7.6
7.5
Average Room
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Matte
Matte
Total Reflections
6.5%
5.2%
Indirect Reflections
5.7%
2.7%
Calculated Direct Reflections
0.8%
2.4%
Text Clarity
7.0
6.0
ClearType On
Pixel Type
IPS
VA
ClearType Off
Pixels
Sub-Pixel Layout
RGB
RGB
Motion
Response Time @ Max Refresh Rate
7.1
6.8
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Faster
Rise / Fall Time
7.7 ms
5.6 ms
Total Response Time
19.2 ms
19.9 ms
Overshoot Error
4.5%
10.4%
Dark Rise / Fall Time
8.4 ms
5.2 ms
Dark Total Response Time
20.7 ms
24.0 ms
Dark Overshoot Error
6.0%
17.5%
Response Time @ 60Hz
7.1
5.9
Motion Blur Picture
Response Time Table
Best Overdrive Setting
Normal
Faster
Rise / Fall Time
7.7 ms
5.5 ms
Total Response Time
19.2 ms
24.4 ms
Overshoot Error
4.5%
13.6%
Dark Rise / Fall Time
8.4 ms
5.1 ms
Dark Total Response Time
20.7 ms
28.8 ms
Dark Overshoot Error
6.0%
24.8%
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
7.7
Variable Refresh Rate
No VRR
FreeSync
Native
60 Hz
75 Hz
Max Refresh Rate
60 Hz
75 Hz
Variable Refresh Rate
No
Yes
FreeSync
No
Yes
G-SYNC
No
Compatible (Tested)
VRR Maximum
N/A
75 Hz
VRR Minimum
No VRR
48 Hz
VRR Supported Connectors
No VRR
DisplayPort, HDMI
Inputs
Input Lag
9.0
9.1
Native Resolution
8.7 ms
8.0 ms
Native Resolution @ 60Hz
8.7 ms
9.7 ms
Variable Refresh Rate
N/A
8.0 ms
Variable Refresh Rate @ 60Hz
N/A
9.7 ms
10 Bit HDR
N/A
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution And Size
8.3
7.1
Native Resolution
2560 x 1440
1920 x 1080
Aspect Ratio
16:9
16:9
Megapixels
3.7 MP
2.1 MP
Pixel Density
109 PPI
69 PPI
Screen Diagonal
27.0"
32.0"
Screen Area
310 in²
438 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.4)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
1 (HDMI 1.4)
1 (HDMI 1.4)
DVI
No
No
VGA
No
1
DisplayPort Out
1 (DP 1.4)
No
USB
4 (USB 3.0)
No
USB C
1 (USB, USB PD, DP Alt Mode)
No
Analog Audio Out 3.5mm
1
1
Microphone In 3.5mm
No
1
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
Internal
External Brick
Features
Additional Features
RGB Illumination
No
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"
UltraSharp U2721DE
SEE PRICE
Amazon.com27"
LC27T55
SEARCH
Amazon.com27"
UltraSharp U2721DE
SEE PRICE
BestBuy.com24"
LC24T55
SEARCH
Amazon.com27"
UltraSharp U2721DE
SEE PRICE
Walmart.com32"
LC32T55
SEE PRICE
Amazon.com27"
UltraSharp U2721DE
SEARCH
B&H
Dell UltraSharp U2721DE
Samsung T55
Comments
Samsung T55 vs Dell UltraSharp U2721DE: Main Discussion
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