Comparison between:
- 27" ViewSonic VA2731-4K-HD
- 27" AOC U27E40
- 27" AOC U27E4
- 27" AOC U27U3D
Brand, series, model
Information about the brand, series, model and model aliases.
| ViewSonic VA2731-4K-HD | AOC U27E40 | AOC U27E4 | AOC U27U3D | |
 |  |  |  | |
| Model year | 2025 | 2025 | 2025 | 2025 |
Display
Information about the main characteristics of the display - panel, backlight, resolution, refresh rate, etc.
| Size class | 27 in | 27 in | 27 in | 27 in |
| Diagonal | 685.655 mm 68.5655 cm 26.9943 in 2.2495 ft | 684.66 mm 68.466 cm 26.9551 in 2.2463 ft | 684.66 mm 68.466 cm 26.9551 in 2.2463 ft | 684.66 mm 68.466 cm 26.9551 in 2.2463 ft |
| Width | 596.736 mm 59.6736 cm 23.4935 in 1.9578 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 | 596.736 mm 59.6736 cm 23.4935 in 1.9578 ft |
| Height | 335.664 mm 33.5664 cm 13.2151 in 1.1013 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 | 335.664 mm 33.5664 cm 13.2151 in 1.1013 ft |
| Panel type | IPS | IPS | IPS | IPS |
| Panel bit depth | 10 bits (8 bits + FRC) | 10 bits (8 bits + FRC) | 10 bits (8 bits + FRC) | 10 bits (8 bits + FRC) |
| FRC | Yes | Yes | Yes | Yes |
| Colors | 1073741824 colors 30 bits | 1073741824 colors 30 bits | 1073741824 colors 30 bits | 1073741824 colors 30 bits |
| Aspect ratio | 1.778:1 16:9 | 1.778:1 16:9 | 1.778:1 16:9 | 1.778:1 16:9 |
| Resolution | 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 | 3840 x 2160 pixels Ultra HD (UHD) / 4K / 2160p |
| Pixel pitch | 0.155 mm 0.0155 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 | 0.155 mm 0.0155 cm 0.0061 in 0.0005 ft |
| Pixel density | 163 ppi 64 ppcm | 163 ppi 64 ppcm | 163 ppi 64 ppcm | 163 ppi 64 ppcm |
| Display area | 89.13 % | 89.54 % | 89.54 % | 89.39 % |
| Backlight | W-LED | W-LED | W-LED | W-LED |
| sRGB | 100 % | 99 % | 99 % | 99 % |
| DCI P3 | - | 90 % | 90 % | 93 % |
| Brightness | 350 cd/m² | 350 cd/m² | 350 cd/m² | 350 cd/m² |
| Peak brightness | - | - | - | 450 cd/m² |
| Static contrast | 1000 : 1 | 1000 : 1 | 1000 : 1 | 2000 : 1 |
| Dynamic contrast | 50000000 : 1 | 20000000 : 1 | 20000000 : 1 | 50000000 : 1 |
| HDR | HDR10 | HDR10 | HDR10 | HDR10 DisplayHDR 400 |
| Horizontal viewing angle | 178 ° | 178 ° | 178 ° | 178 ° |
| Vertical viewing angle | 178 ° | 178 ° | 178 ° | 178 ° |
| Minimum response time | 5 ms 0.0050 s | 4 ms 0.0040 s | 4 ms 0.0040 s | 4 ms 0.0040 s |
| Coating | Anti-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.
| 3D | No | No | No | No |
Frequencies
Information about the horizontal and vertical refresh rates/frequencies.
| Horizontal frequency (digital) | - | 30 kHz - 140 kHz | 30 kHz - 140 kHz | 30 kHz - 140 kHz |
| Vertical frequency (digital) | 60 Hz | 23 Hz - 75 Hz | 23 Hz - 75 Hz | 23 Hz - 75 Hz |
| - | 4K @ 60 Hz | 4K @ 60 Hz | 4K @ 60 Hz |
Power supply and consumption
Information about the power supply and consumption, energy efficiency class, etc.
| 110V | 100 V - 120 V | 100 V - 120 V | 100 V - 120 V | 100 V - 120 V |
| 220V | 220 V - 240 V | 220 V - 240 V | 220 V - 240 V | 220 V - 240 V |
| Alternating current frequency | 50 Hz - 60 Hz | 50 Hz - 60 Hz | 50 Hz - 60 Hz | 50 Hz - 60 Hz |
| Electric current (A) | - | 1.5 A | 1.5 A | 2 A |
| Power consumption (off) | 0.3 W | 0.3 W | 0.3 W | 0.3 W |
| Power consumption (sleep) | 0.5 W | 0.5 W | 0.5 W | 0.5 W |
| Power consumption (average) | 34 W | 35 W | 35 W | 37 W |
| Power consumption (maximum) | 36 W | - | - | - |
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.
| Width | 614 mm 61.4 cm 24.1732 in 2.0144 ft | 613.7 mm 61.37 cm 24.1614 in 2.0135 ft | 613.7 mm 61.37 cm 24.1614 in 2.0135 ft | 613.9 mm 61.39 cm 24.1693 in 2.0141 ft |
| Height | 366 mm 36.6 cm 14.4094 in 1.2008 ft | 364.5 mm 36.45 cm 14.3504 in 1.1959 ft | 364.5 mm 36.45 cm 14.3504 in 1.1959 ft | 365 mm 36.5 cm 14.3701 in 1.1975 ft |
| Depth | 53 mm 5.3 cm 2.0866 in 0.1739 ft | 53.4 mm 5.34 cm 2.1024 in 0.1752 ft | 53.4 mm 5.34 cm 2.1024 in 0.1752 ft | 55.6 mm 5.56 cm 2.189 in 0.1824 ft |
| Weight | 3.6 kg 7.94 lbs | 4.28 kg 9.44 lbs | 4.22 kg 9.3 lbs | 4.49 kg 9.9 lbs |
| Width with stand | 614 mm 61.4 cm 24.1732 in 2.0144 ft | 613.7 mm 61.37 cm 24.1614 in 2.0135 ft | 613.7 mm 61.37 cm 24.1614 in 2.0135 ft | 613.9 mm 61.39 cm 24.1693 in 2.0141 ft |
| Height with stand | 453 mm 45.3 cm 17.8346 in 1.4862 ft | 466 mm 46.6 cm 18.3465 in 1.5289 ft | 401.8 mm 40.18 cm 15.8189 in 1.3182 ft | 400 mm 40 cm 15.748 in 1.3123 ft |
| Depth with stand | 190 mm 19 cm 7.4803 in 0.6234 ft | 190 mm 19 cm 7.4803 in 0.6234 ft | 222 mm 22.2 cm 8.7402 in 0.7283 ft | 238.4 mm 23.84 cm 9.3858 in 0.7822 ft |
| Weight with stand | 4.4 kg 9.7 lbs | 4.62 kg 10.19 lbs | 6.23 kg 13.73 lbs | 6.18 kg 13.62 lbs |
| Box width | 678 mm 67.8 cm 26.6929 in 2.2244 ft | 690 mm 69 cm 27.1654 in 2.2638 ft | 730 mm 73 cm 28.7402 in 2.395 ft | 825 mm 82.5 cm 32.4803 in 2.7067 ft |
| Box height | 450 mm 45 cm 17.7165 in 1.4764 ft | 480 mm 48 cm 18.8976 in 1.5748 ft | 480 mm 48 cm 18.8976 in 1.5748 ft | 480 mm 48 cm 18.8976 in 1.5748 ft |
| Box depth | 118 mm 11.8 cm 4.6457 in 0.3871 ft | 124 mm 12.4 cm 4.8819 in 0.4068 ft | 139 mm 13.9 cm 5.4724 in 0.456 ft | 162 mm 16.2 cm 6.378 in 0.5315 ft |
| Box weight | 6 kg 13.23 lbs | 6.94 kg 15.3 lbs | 8.73 kg 19.25 lbs | 9.78 kg 21.56 lbs |
| Stand depth | 190 mm 19 cm 7.4803 in 0.6234 ft | 190 mm 19 cm 7.4803 in 0.6234 ft | 222 mm 22.2 cm 8.7402 in 0.7283 ft | 238.4 mm 23.84 cm 9.3858 in 0.7822 ft |
| Colors | Black | Black | Black | Black and Silver |
Ergonomics
Information about the ergonomic functions - height adjustment, swivel angles, tilt angles, etc.
| VESA mount | Yes | Yes | Yes | Yes |
| VESA interface | 100 x 100 mm | 100 x 100 mm | 100 x 100 mm | 100 x 100 mm |
| Removable stand | Yes | Yes | Yes | Yes |
| Height adjustment | No | No | Yes | Yes |
| Height adjustment range | - | - | 150 mm 15 cm 5.9055 in 0.4921 ft | 150 mm 15 cm 5.9055 in 0.4921 ft |
| Landscape/portrait pivot | No | No | Yes | Yes |
| Left pivot | - | - | 90 ° | 90 ° |
| Right pivot | - | - | 90 ° | 90 ° |
| Left/right swivel | No | No | Yes | Yes |
| Left swivel | - | - | 175 ° | 30 ° |
| Right swivel | - | - | 175 ° | 30 ° |
| Forward/backward tilt | Yes | Yes | Yes | Yes |
| Forward tilt | 5 ° | 5 ° | 5 ° | 6.5 ° |
| Backward tilt | 20 ° | 23 ° | 30 ° | 23 ° |
Audio
Information about the audio system - number and power of the built-in speakers, supported audio technologies.
| Speakers | - | 2 x 2 W | 2 x 2 W | - |
Camera
Many contemporary desktop monitors and smart TV sets have built-in cameras.
| Camera | No | No | No | No |
Connectivity
Available connectivity ports, slots and interfaces.
| Connectivity | 2 x HDMI 2.0 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out | 1 x HDMI 2.1 (TMDS) 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out | 1 x HDMI 2.1 (TMDS) 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out | 1 x USB 3.2 (Type-C; Gen 1; 5 Gbps; upstream; 90W; DP Alt Mode) 1 x USB 3.2 (Type-B; Gen 1; 5 Gbps; upstream) 4 x USB 3.2 (Type-A; Gen 1; 5 Gbps; downstream; 15W) 2 x HDMI 2.0 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out |
| High-bandwidth Digital Content Protection (HDCP) | High-bandwidth Digital Content Protection (HDCP) 2.2 | High-bandwidth Digital Content Protection (HDCP) 2.2 | High-bandwidth Digital Content Protection (HDCP) |
Features
Some additional functional features of the model.
| Features | Eco Mode Flicker-free technology Low Blue Light ViewMode | 3-sided frameless design Adaptive-Sync technology Clear Vision Dynamic Colour Boost (DCB) technology Dynamic Contrast Ratio (DCR) technology Flicker-free technology HDR Ready Low Blue Light | 3-sided frameless design Adaptive-Sync technology Clear Vision Dynamic Colour Boost (DCB) technology Dynamic Contrast Ratio (DCR) technology Flicker-free technology HDR Ready Low Blue Light | 4-sided frameless design Adaptive-Sync technology AMD FreeSync technology Clear Vision Flicker-free technology HDR Mode KVM Switch Low Blue Light Picture-by-Picture Picture-in-Picture Shadow Boost |
Certificates, standards and licenses
Licenses from regulatory agencies, standards, certificates.
| Certificates, standards and licenses | CCC CEL RoHS | CCC CE CECP CEL FCC RoHS | CCC CE CECP CEL FCC RoHS | EPA EPEAT TCO Certified |
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 temperature | 0 °C - 40 °C 32 °F - 104 °F | - | - | - |
| Operating humidity | 20 % - 90 % | - | - | - |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F | - | - | - |
| Storage humidity | 5 % - 90 % | - | - | - |
Accessories
Often the packaging of desktop monitors and smart TV sets includes accessories for them.
| Accessories | HDMI cable | HDMI cable | HDMI cable | HDMI cable USB Type-A to Type-B cable USB Type-C to Type-C cable |
Additional features
Information about other features.
| Additional features | Anti-theft stand lock slot - Kensington | Anti-theft stand lock slot - Kensington | Anti-theft stand lock slot - Kensington | Anti-theft stand lock slot - Kensington |
| ViewSonic VA2731-4K-HD | AOC U27E40 | AOC U27E4 | AOC U27U3D |