Comparison between:
- 25" Dell UltraSharp U2518D
- 27" Dell UltraSharp U2715H
- 27" Samsung C27JG50
- 27" Iiyama ProLite XB2779QQS-S1

Brand, series, model

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

Dell UltraSharp U2518DDell UltraSharp U2715HSamsung C27JG50Iiyama ProLite XB2779QQS-S1
Dell UltraSharp U2518DDell UltraSharp U2715HSamsung C27JG50Iiyama ProLite XB2779QQS-S1
Model alias--LC27JG50QQNXZA
LC27JG50QQUXEN
XB2779QQS-S1

Display

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

Size class25 in27 in27 in27 in
Diagonal634.4 mm
63.44 cm
24.9764 in
2.0814 ft
684.7 mm
68.47 cm
26.9567 in
2.2464 ft
685.8 mm
68.58 cm
27 in
2.25 ft
685.8 mm
68.58 cm
27 in
2.25 ft
Width552.96 mm
55.296 cm
21.7701 in
1.8142 ft
596.74 mm
59.674 cm
23.4937 in
1.9578 ft
596.736 mm
59.6736 cm
23.4935 in
1.9578 ft
595.2 mm
59.52 cm
23.4331 in
1.9528 ft
Height311.04 mm
31.104 cm
12.2457 in
1.0205 ft
335.66 mm
33.566 cm
13.215 in
1.1012 ft
335.664 mm
33.5664 cm
13.2151 in
1.1013 ft
334.8 mm
33.48 cm
13.1811 in
1.0984 ft
Radius of curvature--1800 mm
180 cm
70.8661 in
5.9055 ft
-
Panel manufacturerLG DisplayLG DisplaySamsung-
Panel modelLM250WQ3-SSA1LM270WQ4-SSA1LSM270DP01-
Panel typeAH-IPSAH-IPSSVAIPS
Panel bit depth8 bits8 bits8 bits8 bits
FRCNoNoNoNo
Colors16777216 colors
24 bits
16777216 colors
24 bits
16777216 colors
24 bits
16777216 colors
24 bits
Aspect ratio1.778:1
16:9
1.778:1
16:9
1.778:1
16:9
1.778:1
16:9
Resolution2560 x 1440 pixels
Quad HD (QHD) / 1440p
2560 x 1440 pixels
Quad HD (QHD) / 1440p
2560 x 1440 pixels
Quad HD (QHD) / 1440p
5120 x 2880 pixels
Pixel pitch0.216 mm
0.0216 cm
0.0085 in
0.0007 ft
0.233 mm
0.0233 cm
0.0092 in
0.0008 ft
0.233 mm
0.0233 cm
0.0092 in
0.0008 ft
0.116 mm
0.0116 cm
0.0046 in
0.0004 ft
Pixel density117 ppi
46 ppcm
109 ppi
42 ppcm
109 ppi
42 ppcm
218 ppi
86 ppcm
Display area91.41 %89.96 %90.09 %74.23 %
BacklightW-LEDW-LEDW-LEDW-LED
sRGB99 %99 %95 %-
Adobe RGB (1998)65 %-68 %-
NTSC (1953)-72 %-78 %
DCI P379.3 %-70 %-
Brightness350 cd/m²350 cd/m²300 cd/m²440 cd/m²
Static contrast1000 : 11000 : 13000 : 11200 : 1
Dynamic contrast2000000 : 12000000 : 1-80000000 : 1
HDRHDR10---
Horizontal viewing angle178 °178 °178 °178 °
Vertical viewing angle178 °178 °178 °178 °
Minimum response time5 ms
0.0050 s
6 ms
0.0060 s
4 ms
0.0040 s
4 ms
0.0040 s
Average response time8 ms
0.0080 s
--12 ms
0.0120 s
Maximum response time-8 ms
0.0080 s
--
Input lag5 ms
0.0050 s
12 ms
0.0120 s
-27 ms
0.0270 s
CoatingAnti-glare/Matte (3H)Anti-glare/Matte (3H)Anti-glare/Matte (3H)-
-CIE1976 - 91%
CIE1931 - 76%
--

3D

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

3DNoNoNoNo

Frequencies

Information about the horizontal and vertical refresh rates/frequencies.

Horizontal frequency (analog)30 kHz - 88 kHz---
Horizontal frequency (digital)30 kHz - 144 kHz30 kHz - 113 kHz-30 kHz - 180 kHz
Vertical frequency (digital)56 Hz - 76 Hz56 Hz - 86 Hz144 Hz55 Hz - 75 Hz
---DisplayPort - 5120 x 2880 @ 60 Hz
HDMI - 3840 x 2160 @ 60 Hz

Power supply and consumption

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

110V100 V - 120 V100 V - 120 V100 V - 120 V100 V - 120 V
220V220 V - 240 V220 V - 240 V220 V - 240 V220 V - 240 V
Alternating current frequency50 Hz - 60 Hz50 Hz - 60 Hz50 Hz - 60 Hz50 Hz - 60 Hz
Amperage1.6 A1.5 A-1.3 A
Power consumption (off)--0.3 W-
Power consumption (sleep)0.5 W0.5 W0.5 W0.5 W
Power consumption (eco)23.81 W---
Power consumption (average)28 W36 W48 W60 W
Power consumption (maximum)110 W88 W--
Energy efficiency class-BCD

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.

Width567.6 mm
56.76 cm
22.3465 in
1.8622 ft
612.7 mm
61.27 cm
24.122 in
2.0102 ft
614.2 mm
61.42 cm
24.1811 in
2.0151 ft
650 mm
65 cm
25.5906 in
2.1325 ft
Height331.5 mm
33.15 cm
13.0512 in
1.0876 ft
363.4 mm
36.34 cm
14.3071 in
1.1923 ft
362 mm
36.2 cm
14.252 in
1.1877 ft
413 mm
41.3 cm
16.2598 in
1.355 ft
Depth49.2 mm
4.92 cm
1.937 in
0.1614 ft
46.4 mm
4.64 cm
1.8268 in
0.1522 ft
138.9 mm
13.89 cm
5.4685 in
0.4557 ft
43.5 mm
4.35 cm
1.7126 in
0.1427 ft
Weight3.44 kg
7.58 lbs
4.91 kg
10.82 lbs
3.7 kg
8.16 lbs
-
Width with stand567.6 mm
56.76 cm
22.3465 in
1.8622 ft
612.7 mm
61.27 cm
24.122 in
2.0102 ft
614.2 mm
61.42 cm
24.1811 in
2.0151 ft
650 mm
65 cm
25.5906 in
2.1325 ft
Height with stand397.2 mm
39.72 cm
15.6378 in
1.3031 ft
409.9 mm
40.99 cm
16.1378 in
1.3448 ft
462.9 mm
46.29 cm
18.2244 in
1.5187 ft
434.5 mm
43.45 cm
17.1063 in
1.4255 ft
Depth with stand200.1 mm
20.01 cm
7.878 in
0.6565 ft
205 mm
20.5 cm
8.0709 in
0.6726 ft
242.8 mm
24.28 cm
9.5591 in
0.7966 ft
230 mm
23 cm
9.0551 in
0.7546 ft
Weight with stand6.24 kg
13.76 lbs
7.02 kg
15.48 lbs
4.3 kg
9.48 lbs
8.2 kg
18.08 lbs
ColorsSilverBlack
Silver
BlackSilver

Ergonomics

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

VESA mountYesYesYesYes
VESA interface100 x 100 mm100 x 100 mm75 x 75 mm100 x 100 mm
Removable standYesYesYesYes
Height adjustmentYesYesNoYes
Height adjustment range130 mm
13 cm
5.1181 in
0.4265 ft
100 mm
10 cm
3.937 in
0.3281 ft
-130 mm
13 cm
5.1181 in
0.4265 ft
Landscape/portrait pivotYesYesNoNo
Left pivot90 °90 °--
Right pivot90 °0 °--
Left/right swivelYesYesNoYes
Left swivel45 °45 °-45 °
Right swivel45 °45 °-45 °
Forward/backward tiltYesYesYesYes
Forward tilt5 °5 °1.5 °2 °
Backward tilt21 °21 °15 °17 °

Audio

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

Speakers---2 x 2 W
-Dell speaker bar AC511 - optional--

Camera

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

CameraNoNoNoNo

Connectivity

Available connectivity ports, slots and interfaces.

Connectivity2 x USB 3.0 (charger - 5V/2.0A)
2 x USB 3.0 (downstream)
1 x USB 3.0 (upstream)
1 x HDMI 2.0
1 x DisplayPort 1.2
1 x DisplayPort 1.2 (Input mini)
1 x DisplayPort 1.2 (Output MST)
1 x 3.5 mm Audio Out
5 x USB 3.0 (downstream)
1 x USB 3.0 (upstream)
2 x HDMI 1.4 (MHL 2.0)
1 x DisplayPort (Input mini)
1 x DisplayPort (Output MST)
1 x DisplayPort 1.2
1 x 3.5 mm Audio Out
1 x HDMI 1.4
1 x HDMI 2.0
1 x DisplayPort 1.2
1 x 3.5 mm Audio Out
3 x HDMI 2.0
2 x DisplayPort 1.2
1 x 3.5 mm Audio Out

Features

Some additional functional features of the model.

FeaturesFlicker-free technology
HDCP (High-bandwidth Digital Content Protection)
-Black Equalizer
Eco Saving Plus
Eye Saver Mode
Flicker-free technology
HDCP (High-bandwidth Digital Content Protection)
EcoModes
Flicker-free technology
HDCP (High-bandwidth Digital Content Protection)
Low Blue Light
Picture-by-Picture
Picture-in-Picture

Certificates, standards and licenses

Licenses from regulatory agencies, standards, certificates.

Certificates, standards and licensesENERGY STAR
Epeat Gold
RoHS Compliant
TCO Certified Displays
ENERGY STAR 6.0
Epeat Gold
RoHS Compliant
TCO Certified Displays
CE
FCC class B
ISO9241-307
TÜV/Ergonomics
TÜV/GS
CE
ENERGY STAR
PSE
TÜV/GS
VCCI-B

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 - 35 °C
32 °F - 95 °F
0 °C - 40 °C
32 °F - 104 °F
10 °C - 40 °C
50 °F - 104 °F
5 °C - 35 °C
41 °F - 95 °F
Operating humidity10 % - 80 %10 % - 80 %10 % - 80 %10 % - 80 %
Operating altitude5000 m
16404.2 ft
5000 m
16404.2 ft
--
Storage temperature-20 °C - 60 °C
-4 °F - 140 °F
-20 °C - 60 °C
-4 °F - 140 °F
--20 °C - 60 °C
-4 °F - 140 °F
Storage humidity5 % - 90 %5 % - 90 %-5 % - 85 %
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 - mini-DP to DP
Factory calibration report
USB 3.0 upstream cable
DisplayPort cable - mini-DP to DP
Factory calibration report
HDMI cable
USB 3.0 upstream cable
HDMI cableDisplayPort cable
HDMI cable

Additional features

Information about other features.

Additional featuresAnti-theft stand lock slot
Security lock slot
Anti-theft stand lock slot - Kensington-Anti-theft stand lock slot - Kensington
 Dell UltraSharp U2518DDell UltraSharp U2715HSamsung C27JG50Iiyama ProLite XB2779QQS-S1