Comparison between:
- 27" HP U27 4K Wireless Monitor
- 27" ViewSonic VG2756-4K
- 27" Dell S2721QS
- 27" Dell S2721Q

Brand, series, model

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

HP U27 4K Wireless MonitorViewSonic VG2756-4KDell S2721QSDell S2721Q
HP U27 4K Wireless MonitorViewSonic VG2756-4KDell S2721QSDell S2721Q
Model alias9TQ12AA
9TQ13AA
---

Display

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

Size class27 in27 in27 in27 in
Diagonal684.7 mm
68.47 cm
26.9567 in
2.2464 ft
685.8 mm
68.58 cm
27 in
2.25 ft
684.7 mm
68.47 cm
26.9567 in
2.2464 ft
684.7 mm
68.47 cm
26.9567 in
2.2464 ft
Width596.736 mm
59.6736 cm
23.4935 in
1.9578 ft
597.888 mm
59.7888 cm
23.5389 in
1.9616 ft
596.736 mm
59.6736 cm
23.4935 in
1.9578 ft
596.736 mm
59.6736 cm
23.4935 in
1.9578 ft
Height335.664 mm
33.5664 cm
13.2151 in
1.1013 ft
336.312 mm
33.6312 cm
13.2406 in
1.1034 ft
335.664 mm
33.5664 cm
13.2151 in
1.1013 ft
335.664 mm
33.5664 cm
13.2151 in
1.1013 ft
Panel typeIPSIPSIPSIPS
Panel bit depth10 bits10 bits (8 bits + FRC)10 bits10 bits
FRC-Yes--
Colors1073741824 colors
30 bits
1073741824 colors
30 bits
1073741824 colors
30 bits
1073741824 colors
30 bits
Aspect ratio1.778:1
16:9
1.778:1
16:9
1.778:1
16:9
1.778:1
16:9
Resolution3840 x 2160 pixels
Ultra HD (UHD) / 4K / 2160p
3840 x 2160 pixels
Ultra HD (UHD) / 4K / 2160p
3840 x 2160 pixels
Ultra HD (UHD) / 4K / 2160p
3840 x 2160 pixels
Ultra HD (UHD) / 4K / 2160p
Pixel pitch0.155 mm
0.0155 cm
0.0061 in
0.0005 ft
0.156 mm
0.0156 cm
0.0061 in
0.0005 ft
0.155 mm
0.0155 cm
0.0061 in
0.0005 ft
0.155 mm
0.0155 cm
0.0061 in
0.0005 ft
Pixel density163 ppi
64 ppcm
163 ppi
64 ppcm
163 ppi
64 ppcm
163 ppi
64 ppcm
Display area89.08 %90.36 %89.83 %89.83 %
BacklightW-LEDW-LEDW-LEDW-LED
sRGB99 %-99 %99 %
Brightness300 cd/m²350 cd/m²350 cd/m²350 cd/m²
Static contrast1000 : 11000 : 11300 : 11300 : 1
Dynamic contrast10000000 : 150000000 : 1--
Horizontal viewing angle178 °178 °178 °178 °
Vertical viewing angle178 °178 °178 °178 °
Minimum response time5 ms
0.0050 s
5 ms
0.0050 s
4 ms
0.0040 s
4 ms
0.0040 s
Average response time8 ms
0.0080 s
14 ms
0.0140 s
8 ms
0.0080 s
8 ms
0.0080 s
CoatingAnti-glare/Matte (3H)Anti-glare/Matte (3H)Anti-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.

3DNoNoNoNo

Frequencies

Information about the horizontal and vertical refresh rates/frequencies.

Horizontal frequency (digital)31 kHz - 135 kHz15 kHz - 150 kHz130 kHz - 137 kHz130 kHz - 137 kHz
Vertical frequency (digital)40 Hz - 60 Hz24 Hz - 75 Hz40 Hz - 60 Hz40 Hz - 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
Power consumption (off)-0.3 W0.3 W0.3 W
Power consumption (sleep)0.3 W0.5 W0.3 W0.3 W
Power consumption (eco)-21.2 W24.3 W24.3 W
Power consumption (average)46.2 W30.7 W28 W28 W
Power consumption (maximum)72 W70 W52 W52 W
Energy efficiency classB---

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.

Width613.5 mm
61.35 cm
24.1535 in
2.0128 ft
613 mm
61.3 cm
24.1339 in
2.0112 ft
611.6 mm
61.16 cm
24.0787 in
2.0066 ft
611.6 mm
61.16 cm
24.0787 in
2.0066 ft
Height366.5 mm
36.65 cm
14.4291 in
1.2024 ft
363 mm
36.3 cm
14.2913 in
1.1909 ft
364.6 mm
36.46 cm
14.3543 in
1.1962 ft
364.6 mm
36.46 cm
14.3543 in
1.1962 ft
Depth53.2 mm
5.32 cm
2.0945 in
0.1745 ft
52 mm
5.2 cm
2.0472 in
0.1706 ft
55.4 mm
5.54 cm
2.1811 in
0.1818 ft
55.4 mm
5.54 cm
2.1811 in
0.1818 ft
Weight5 kg
11.02 lbs
5.1 kg
11.24 lbs
4.7 kg
10.36 lbs
4.7 kg
10.36 lbs
Width with stand613.5 mm
61.35 cm
24.1535 in
2.0128 ft
613 mm
61.3 cm
24.1339 in
2.0112 ft
611.6 mm
61.16 cm
24.0787 in
2.0066 ft
611.6 mm
61.16 cm
24.0787 in
2.0066 ft
Height with stand401.3 mm
40.13 cm
15.7992 in
1.3166 ft
406 mm
40.6 cm
15.9843 in
1.332 ft
400.1 mm
40.01 cm
15.752 in
1.3127 ft
453.4 mm
45.34 cm
17.8504 in
1.4875 ft
Depth with stand193.5 mm
19.35 cm
7.6181 in
0.6348 ft
202 mm
20.2 cm
7.9528 in
0.6627 ft
174.7 mm
17.47 cm
6.878 in
0.5732 ft
186.8 mm
18.68 cm
7.3543 in
0.6129 ft
Weight with stand-7.5 kg
16.53 lbs
6.4 kg
14.11 lbs
5.6 kg
12.35 lbs
ColorsSilverBlackSilverSilver

Ergonomics

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

VESA mountYesYesYesYes
VESA interface100 x 100 mm100 x 100 mm100 x 100 mm100 x 100 mm
Removable standYesYesYesYes
Height adjustmentYesYesYesNo
Height adjustment range100 mm
10 cm
3.937 in
0.3281 ft
130 mm
13 cm
5.1181 in
0.4265 ft
110 mm
11 cm
4.3307 in
0.3609 ft
-
Landscape/portrait pivotNoYesYesNo
Left pivot-90 °90 °-
Right pivot-90 °90 °-
Left/right swivelYesYesYesNo
Left swivel-60 °30 °-
Right swivel-60 °30 °-
Forward/backward tiltYesYesYesYes
Forward tilt5 °5 °5 °5 °
Backward tilt16 °40 °21 °21 °
--Stand width - 257 mm
Stand depth - 174.7 mm
Stand width - 257.2 mm
Stand depth - 186.8 mm

Audio

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

Speakers2 x 3 W2 x 2 W2 x 3 W2 x 3 W

Camera

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

CameraNoNoNoNo

Network

Supported network technologies and standards for exchanging data with other devices.

NetworkWi-Fi Direct---

Connectivity

Available connectivity ports, slots and interfaces.

Connectivity1 x USB 3.2 (Type-B; Gen 1; upstream)
3 x USB 3.2 (Type-A; Gen 1; downstream)
1 x HDMI 2.0
1 x DisplayPort 1.2
1 x 3.5 mm Audio In
1 x 3.5 mm Audio Out
1 x USB 3.2 (Type-B; Gen 1; upstream)
2 x USB 3.2 (Type-A; Gen 1; downstream)
1 x USB 3.2 (Type-C; Gen 1; upstream)
1 x Ethernet RJ45
2 x HDMI 2.0
1 x DisplayPort 1.2
2 x HDMI 2.0
1 x DisplayPort 1.2
1 x 3.5 mm Audio Out
2 x HDMI 2.0
1 x DisplayPort 1.2
1 x 3.5 mm Audio Out
High-bandwidth Digital Content Protection (HDCP)High-bandwidth Digital Content Protection (HDCP)High-bandwidth Digital Content Protection (HDCP) 1.4High-bandwidth Digital Content Protection (HDCP) 1.4

Features

Some additional functional features of the model.

Features3-sided Borderless Design
AMD FreeSync technology
Flicker-free technology
Low Blue Light
Blue Light Filter
Flicker-free technology
3-sided bezeless design
AMD FreeSync technology
Flicker-free technology
Low Blue Light
3-sided bezeless design
AMD FreeSync technology
Flicker-free technology
Low Blue Light

Certificates, standards and licenses

Licenses from regulatory agencies, standards, certificates.

Certificates, standards and licensesCB
CCC
CE
China CEL
CSA
CSA-NRTL
BSMI
EAC
EUP Lot-6
FCC
GEMS
HRN N N0.201
ICES
IS 1121
KC/KCC
PSB
RCM
SABS IEC 60950-1
SASO
TUV Bauart
VCCI
ISC
EUP Lot-26
IEC 60950:1999
eStandby
MEPS (HP) UKRAINIA
ISO 9241
cTUVus
Energy Star
EPEAT
FCC-B
ICES003
MX-CoC
Mexico Energy
ENERGY STAR 8.0
EPEAT
RoHS
TCO Certified
TUV Flicker Free
TUV Low Blue Light
ENERGY STAR 8.0
EPEAT
RoHS
TCO Certified
TUV Flicker Free
TUV Low Blue Light

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 temperature5 °C - 35 °C
41 °F - 95 °F
0 °C - 40 °C
32 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
0 °C - 40 °C
32 °F - 104 °F
Operating humidity20 % - 80 %20 % - 90 %10 % - 80 %10 % - 80 %
Operating altitude5000 m
16404.2 ft
5000 m
16404.2 ft
5000 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 % - 90 %
Storage altitude12192 m
40000 ft
-12192 m
40000 ft
12192 m
40000 ft

Accessories

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

AccessoriesDisplayPort cable
HDMI cable
USB cable
DisplayPort cable
USB Type-C cable
USB Type-B cable
HDMI cableHDMI cable

Additional features

Information about other features.

Additional featuresAnti-theft stand lock slot - KensingtonAnti-theft stand lock slot - KensingtonAnti-theft stand lock slot - KensingtonAnti-theft stand lock slot - Kensington
 HP U27 4K Wireless MonitorViewSonic VG2756-4KDell S2721QSDell S2721Q