Comparison between:
- 27" Dell S2721HGF
- 28" Samsung U28E590D
- 28" Lenovo L28u-30
Brand, series, model
Information about the brand, series, model and model aliases.
| Dell S2721HGF | Samsung U28E590D | Lenovo L28u-30 | |
 |  |  | |
| Model alias | - | LU28E590DS/ZA | 65FAGAC2 |
| Model year | 2020 | 2015 | 2020 |
Display
Information about the main characteristics of the display - panel, backlight, resolution, refresh rate, etc.
| Size class | 27 in | 28 in | 28 in |
| Diagonal | 684.7 mm 68.47 cm 26.9567 in 2.2464 ft | 711.2 mm 71.12 cm 28 in 2.3333 ft | 685.8 mm 68.58 cm 27 in 2.25 ft |
| Width | 596.736 mm 59.6736 cm 23.4935 in 1.9578 ft | 620.928 mm 62.0928 cm 24.446 in 2.0372 ft | 631.928 mm 63.1928 cm 24.8791 in 2.0733 ft |
| Height | 335.664 mm 33.5664 cm 13.2151 in 1.1013 ft | 341.28 mm 34.128 cm 13.4362 in 1.1197 ft | 359.78 mm 35.978 cm 14.1646 in 1.1804 ft |
| Radius of curvature | 1500 mm 150 cm 59.0551 in 4.9213 ft | - | - |
| Panel manufacturer | - | Innolux | - |
| Panel model | - | M280DGJ-L30 | - |
| Panel type | VA | TN | IPS |
| Panel bit depth | 8 bits | 10 bits (8 bits + FRC) | 10 bits (8 bits + FRC) |
| FRC | - | Yes | Yes |
| Colors | 16777216 colors 24 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 |
| Resolution | 1920 x 1080 pixels Full HD / 1080p | 3840 x 2160 pixels Ultra HD (UHD) / 4K / 2160p | 3840 x 2160 pixels Ultra HD (UHD) / 4K / 2160p |
| Pixel pitch | 0.311 mm 0.0311 cm 0.0122 in 0.001 ft | 0.16 mm 0.016 cm 0.0063 in 0.0005 ft | 0.161 mm 0.0161 cm 0.0063 in 0.0005 ft |
| Pixel density | 81 ppi 32 ppcm | 157 ppi 61 ppcm | 154 ppi 60 ppcm |
| Display area | 90.42 % | 84.09 % | 95.52 % |
| Backlight | W-LED | W-LED | W-LED |
| sRGB | - | 98 % | 99 % |
| Adobe RGB (1998) | - | 67 % | - |
| NTSC (1953) | 83 % | 72 % | - |
| DCI P3 | - | - | 90 % |
| Brightness | 350 cd/m² | 370 cd/m² | 250 cd/m² |
| Peak brightness | - | - | 300 cd/m² |
| Static contrast | 3000 : 1 | 1000 : 1 | 1000 : 1 |
| Dynamic contrast | - | 100000000 : 1 | 3000000 : 1 |
| Horizontal viewing angle | 178 ° | 170 ° | 178 ° |
| Vertical viewing angle | 178 ° | 160 ° | 178 ° |
| Minimum response time | 4 ms 0.0040 s | 1 ms 0.0010 s | 4 ms 0.0040 s |
| Average response time | - | 3.5 ms 0.0035 s | 6 ms 0.0060 s |
| Maximum response time | - | 23 ms 0.0230 s | - |
| Input lag | 9 ms 0.0090 s | 15 ms 0.0150 s | - |
| Coating | Anti-glare/Matte (3H) | Anti-glare/Matte (3H) | Anti-glare/Matte |
| Response time - 1 ms (MPRT - Motion Picture Response Time) | - | - |
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 |
Frequencies
Information about the horizontal and vertical refresh rates/frequencies.
| Horizontal frequency (digital) | - | 30 kHz - 135 kHz | - |
| Vertical frequency (digital) | 48 Hz - 144 Hz | 24 Hz - 75 Hz | - |
| - | DisplayPort - 3840 x 2160 @ 60 Hz HDMI1 - 3840 x 2160 @ 30 Hz HDMI2 - 3840 x 2160 @ 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 |
| 220V | 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 |
| Electric current (A) | - | - | 1.5 A |
| Power consumption (off) | - | 0.3 W | 0.3 W |
| Power consumption (sleep) | 0.5 W | 0.45 W | 0.3 W |
| Power consumption (eco) | - | 29.6 W | - |
| Power consumption (average) | 27 W | 38 W | 31 W |
| Power consumption (maximum) | 46 W | 45 W | 48 W |
| Power consumption (annual) | - | 85 kWh | - |
| Energy efficiency class | - | B | - |
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 | 608.4 mm 60.84 cm 23.9528 in 1.9961 ft | 660.9 mm 66.09 cm 26.0197 in 2.1683 ft | 636.94 mm 63.694 cm 25.0764 in 2.0897 ft |
| Height | 364.1 mm 36.41 cm 14.3346 in 1.1946 ft | 381.3 mm 38.13 cm 15.0118 in 1.251 ft | 373.68 mm 37.368 cm 14.7118 in 1.226 ft |
| Depth | 96.3 mm 9.63 cm 3.7913 in 0.3159 ft | 73.5 mm 7.35 cm 2.8937 in 0.2411 ft | 49.2 mm 4.92 cm 1.937 in 0.1614 ft |
| Weight | 4.06 kg 8.95 lbs | 4.7 kg 10.36 lbs | 4.58 kg 10.1 lbs |
| Width with stand | 608.4 mm 60.84 cm 23.9528 in 1.9961 ft | 660.9 mm 66.09 cm 26.0197 in 2.1683 ft | 636.94 mm 63.694 cm 25.0764 in 2.0897 ft |
| Height with stand | 493.2 mm 49.32 cm 19.4173 in 1.6181 ft | 468.5 mm 46.85 cm 18.4449 in 1.5371 ft | 450.82 mm 45.082 cm 17.7488 in 1.4791 ft |
| Depth with stand | 190.4 mm 19.04 cm 7.4961 in 0.6247 ft | 187.1 mm 18.71 cm 7.3661 in 0.6138 ft | 219.98 mm 21.998 cm 8.6606 in 0.7217 ft |
| Weight with stand | 8.86 kg 19.53 lbs | 5.28 kg 11.64 lbs | 5.2 kg 11.46 lbs |
| Box width | - | 740 mm 74 cm 29.1339 in 2.4278 ft | 738 mm 73.8 cm 29.0551 in 2.4213 ft |
| Box height | - | 461 mm 46.1 cm 18.1496 in 1.5125 ft | 452 mm 45.2 cm 17.7953 in 1.4829 ft |
| Box depth | - | 141 mm 14.1 cm 5.5512 in 0.4626 ft | 127 mm 12.7 cm 5 in 0.4167 ft |
| Box weight | 8.72 kg 19.22 lbs | 7.75 kg 17.09 lbs | 7.5 kg 16.53 lbs |
| Colors | Black | Black | Black |
Ergonomics
Information about the ergonomic functions - height adjustment, swivel angles, tilt angles, etc.
| VESA mount | Yes | Yes | Yes |
| VESA interface | 100 x 100 mm | 75 x 75 mm | 100 x 100 mm |
| Removable stand | Yes | Yes | Yes |
| Height adjustment | Yes | No | No |
| Height adjustment range | 100 mm 10 cm 3.937 in 0.3281 ft | - | - |
| Landscape/portrait pivot | No | No | No |
| Left/right swivel | No | No | No |
| Forward/backward tilt | Yes | Yes | Yes |
| Forward tilt | 5 ° | 2 ° | 5 ° |
| Backward tilt | 21 ° | 20 ° | 22 ° |
| - | T-shape stand | - |
Camera
Many contemporary desktop monitors and smart TV sets have built-in cameras.
| Camera | No | No | No |
Connectivity
Available connectivity ports, slots and interfaces.
| Connectivity | 2 x HDMI 1.4 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 | 1 x HDMI 2.0 1 x DisplayPort 1.2 1 x 3.5 mm Audio Out |
| High-bandwidth Digital Content Protection (HDCP) 1.4 | High-bandwidth Digital Content Protection (HDCP) | High-bandwidth Digital Content Protection (HDCP) |
Features
Some additional functional features of the model.
| Features | AMD FreeSync Premium Flicker-free technology Low Blue Light NVIDIA G-SYNC Compatible | AMD FreeSync technology Eco Saving Plus Eye saver mode Flicker-free technology Low Blue Light Picture-by-Picture Picture-in-Picture Samsung MagicAngle Samsung MagicBright UHD Upscale | 3-side NearEdgeless design AMD FreeSync technology Flicker-free technology Low Blue Light |
Certificates, standards and licenses
Licenses from regulatory agencies, standards, certificates.
| Certificates, standards and licenses | ENERGY STAR EPEAT TCO Certified RoHS | CE ISO9241-307 TÜV/Ergonomics | CCC China Energy Efficiency Standard Tier 1 ENERGY STAR 8.0 EPEAT Gold Eyesafe Display Certification RoHS (EU 2002/95/EC) TÜV Rheinland Eye Comfort Windows Certification |
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 | 10 °C - 40 °C 50 °F - 104 °F | 0 °C - 45 °C 32 °F - 113 °F |
| Operating humidity | 10 % - 80 % | 10 % - 80 % | 10 % - 80 % |
| Operating altitude | 5000 m 16404.2 ft | - | 5000 m 16404.2 ft |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F | -20 °C - 45 °C -4 °F - 113 °F | -20 °C - 60 °C -4 °F - 140 °F |
| Storage humidity | 5 % - 90 % | 5 % - 95 % | 5 % - 95 % |
| Storage altitude | 12192 m 40000 ft | - | 12192 m 40000 ft |
Accessories
Often the packaging of desktop monitors and smart TV sets includes accessories for them.
| Accessories | - | DisplayPort cable HDMI cable | HDMI cable |
Additional features
Information about other features.
| Additional features | - | - | Anti-theft stand lock slot - Kensington |
| Dell S2721HGF | Samsung U28E590D | Lenovo L28u-30 |