Comparison between:
- 25" Dell U2520D
- 23.8" ViewSonic VG2455-2K

Brand, series, model

Information about the brand, series, model and model aliases.

Dell U2520DViewSonic VG2455-2K
SeriesUltraSharp-
Dell U2520DViewSonic VG2455-2K
Model aliasUltraSharp U2520D
U2520DR		-
Model year20202018

Display

Information about the main characteristics of the display - panel, backlight, resolution, refresh rate, etc.

Size class25 in23.8 in
Diagonal634.4 mm
63.44 cm
24.9764 in
2.0814 ft		604.7 mm
60.47 cm
23.8071 in
1.9839 ft
Width552.96 mm
55.296 cm
21.7701 in
1.8142 ft		525.7 mm
52.57 cm
20.6969 in
1.7247 ft
Height311.04 mm
31.104 cm
12.2457 in
1.0205 ft		295.7 mm
29.57 cm
11.6417 in
0.9701 ft
Panel manufacturerLG Display-
Panel modelLM250WQ4-SSA1-
Panel typeIPSIPS
Panel bit depth8 bits8 bits
FRCNoNo
Colors16777216 colors
24 bits		16777216 colors
24 bits
Aspect ratio1.778:1
16:9		1.778:1
16:9
Resolution2560 x 1440 pixels
Quad HD (QHD) / 1440p		2560 x 1440 pixels
Quad HD (QHD) / 1440p
Pixel pitch0.216 mm
0.0216 cm
0.0085 in
0.0007 ft		0.205 mm
0.0205 cm
0.0081 in
0.0007 ft
Pixel density117 ppi
46 ppcm		123 ppi
48 ppcm
Display area91.23 %90.13 %
BacklightW-LEDW-LED
sRGB99 %-
NTSC (1953)-72 %
DCI P395 %-
Brightness350 cd/m²300 cd/m²
Static contrast1000 : 11000 : 1
Dynamic contrast-80000000 : 1
HDRDisplayHDR 400-
Horizontal viewing angle178 °178 °
Vertical viewing angle178 °178 °
Minimum response time5 ms
0.0050 s		5 ms
0.0050 s
Average response time8 ms
0.0080 s		15 ms
0.0150 s
CoatingAnti-glare/Matte (3H)Anti-glare/Matte (3H)

3D

3D displays use various technologies to achieve a 3D effect. Each of these technologies has its own advantages and drawbacks.

3DNoNo

Frequencies

Information about the horizontal and vertical refresh rates/frequencies.

Horizontal frequency (digital)10 kHz - 120 kHz15 kHz - 90 kHz
Vertical frequency (digital)48 Hz - 75 Hz49 Hz - 75 Hz

Power supply and consumption

Information about the power supply and consumption, energy efficiency class, etc.

110V100 V - 120 V100 V - 120 V
220V220 V - 240 V220 V - 240 V
Alternating current frequency50 Hz - 60 Hz50 Hz - 60 Hz
Electric current (A)2.5 A-
Power consumption (off)0.3 W0.3 W
Power consumption (sleep)0.3 W0.5 W
Power consumption (eco)20.6 W17.7 W
Power consumption (average)24 W27.4 W
Power consumption (maximum)-58.5 W
Power consumption (annual)66.2 kWh-

Dimensions, weight and color

Information about the dimensions and the weight of the specific model with and without stand as well as the colors, in which it is offered to the market.

Width567.7 mm
56.77 cm
22.3504 in
1.8625 ft		539 mm
53.9 cm
21.2205 in
1.7684 ft
Height332.1 mm
33.21 cm
13.0748 in
1.0896 ft		320 mm
32 cm
12.5984 in
1.0499 ft
Depth49.9 mm
4.99 cm
1.9646 in
0.1637 ft		52 mm
5.2 cm
2.0472 in
0.1706 ft
Weight4.2 kg
9.26 lbs		4 kg
8.82 lbs
Width with stand567.7 mm
56.77 cm
22.3504 in
1.8625 ft		539 mm
53.9 cm
21.2205 in
1.7684 ft
Height with stand382.9 mm
38.29 cm
15.0748 in
1.2562 ft		406.2 mm
40.62 cm
15.9921 in
1.3327 ft
Depth with stand185 mm
18.5 cm
7.2835 in
0.607 ft		202 mm
20.2 cm
7.9528 in
0.6627 ft
Weight with stand6.4 kg
14.11 lbs		6.4 kg
14.11 lbs
Box weight8.8 kg
19.4 lbs		-
ColorsBlackBlack

Ergonomics

Information about the ergonomic functions - height adjustment, swivel angles, tilt angles, etc.

VESA mountYesYes
VESA interface100 x 100 mm100 x 100 mm
Removable standYesYes
Height adjustmentYesYes
Height adjustment range130 mm
13 cm
5.1181 in
0.4265 ft		130 mm
13 cm
5.1181 in
0.4265 ft
Landscape/portrait pivotYesYes
Left pivot90 °90 °
Right pivot90 °90 °
Left/right swivelYesYes
Left swivel45 °60 °
Right swivel45 °60 °
Forward/backward tiltYesYes
Forward tilt5 °5 °
Backward tilt21 °40 °

Audio

Information about the audio system - number and power of the built-in speakers, supported audio technologies.

Speakers-2 x 2 W

Camera

Many contemporary desktop monitors and smart TV sets have built-in cameras.

CameraNoNo

Connectivity

Available connectivity ports, slots and interfaces.

Connectivity1 x USB 3.0 (Type-C; upstream; 90W; DisplayPort)
1 x USB 3.0 (Type-C; Gen 1; downstream; 15W)
1 x USB 3.0 (Type-A; downstream; BC 1.2 charging at 2A)
2 x USB 3.0 (Type-A; downstream)
1 x HDMI 2.0 (CEC)
1 x DisplayPort 1.4 (out)
1 x DisplayPort 1.4 (in)
1 x 3.5 mm Audio Out		1 x USB 3.0 (upstream)
3 x USB 3.0 (downstream)
1 x USB 3.1 (Type-C)
1 x HDMI 1.4
1 x DisplayPort 1.2
High-bandwidth Digital Content Protection (HDCP) 2.2High-bandwidth Digital Content Protection (HDCP)

Features

Some additional functional features of the model.

FeaturesFlicker-free technology
Low Blue Light		Blue Light Filter
Flicker-free technology

Certificates, standards and licenses

Licenses from regulatory agencies, standards, certificates.

Certificates, standards and licensesBFR-free
CEL
ENERGY STAR 6.0
EPEAT
Mercury-free
NFPA 99
PVC-free
RoHS Compliant
TCO Certified Displays		CB
CCC
CE
CEL Level 1
CU
ENERGY STAR 7.0
Epeat Silver
ErP
eStandby
FCC Class B
REACH SVHC List & DoC
RoHS
VCCI
WEEE

Operating and storage conditions

There are certain requirements for the environmental conditions, in which the display should be used and stored in order to function properly.

Operating temperature0 °C - 40 °C
32 °F - 104 °F		0 °C - 40 °C
32 °F - 104 °F
Operating humidity10 % - 80 %10 % - 85 %
Operating altitude5000 m
16404.2 ft		5000 m
16404.2 ft
Storage temperature-20 °C - 60 °C
-4 °F - 140 °F		-25 °C - 55 °C
-13 °F - 131 °F
Storage humidity5 % - 90 %20 % - 90 %
Storage altitude12192 m
40000 ft		12192 m
40000 ft

Accessories

Often the packaging of desktop monitors and smart TV sets includes accessories for them.

AccessoriesDisplayPort cable (U2520D)
HDMI cable (U2520DR)
USB Type-C to Type-C cable
USB Type-C to Type-A cable		DisplayPort cable
USB 3.0 upstream cable

Additional features

Information about other features.

Additional featuresSecurity lock slot
Anti-theft stand lock slot		Anti-theft stand lock slot - Kensington
 Dell U2520DViewSonic VG2455-2K