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| General Info | ||
|---|---|---|
| Model Number | Acer KG251Qbiix | Dell U2721DE |
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| Price | ||
| Type | Monitor | Monitor |
| Year | 2017 | 2020 |
| Brand | Acer | Dell |
| Model Number | KG251Qbiix | U2721DE |
| Alias | KG251Q biix | |
| Display | ||
| Screen Size Class | 25" (inches) | 27" (inches) |
| Diagonal Size | 24.5 in 62.2 cm 622.3 mm 2.04 ft |
26.96 in 68.5 cm 684.7 mm 2.25 ft |
| Screen Width | 21.41 in 54.4 cm 543.744 mm 1.78 ft |
23.49 in 59.7 cm 596.736 mm 1.96 ft |
| Screen Height | 11.91 in 30.3 cm 302.616 mm 0.99 ft |
13.22 in 33.6 cm 335.664 mm 1.1 ft |
| Display Type | TN | IPS |
| Display Bit Depth | 8 bits (6 bits + FRC) | 8 bits |
| Frame Rate Control | Yes | |
| Max Number of Colors | 16777216 | 16777216 |
| Bits | 24 | 24 |
| Screen Aspect Ratio | 16:9 | 16:9 |
| Screen Resolution | 1920 x 1080 | 2560 x 1440 |
| Screen Pixel Pitch | 0.283 mm | 0.233 mm |
| Screen Pixel Density | 89 ppi | 109 ppi |
| Screen-to-Body Ratio | 88.65 % | 92.16 % |
| Backlight Source | W-LED | W-LED |
| DCI P3 | 89% | |
| sRGB | 99 % | |
| NTSC 1953 | 72 % | |
| Screen Brightness | 250 cd/m² | 350 cd/m² |
| Static Screen Contrast | 1000 : 1 | 1000 : 1 |
| Dynamic Screen Contrast | 100000000 : 1 | |
| Screen Horizontal Viewing Angle | 170 ° | 178 ° |
| Screen Vertical Viewing Angle | 160 ° | 178 ° |
| Display Minimum Response Time | 1 ms | 5 ms |
| Display Average Response Time | 8 ms | |
| Display Coating | Anti-glare/Matte (3H) | Anti-glare/Matte (3H) |
| 3D | No | No |
| Size, weight, color | ||
| Case Depth | 2.2 in 5.6 cm 56 mm 0.18 ft |
1.54 in 3.9 cm 39 mm 0.13 ft |
| Case Weight | 4.19 kg 9 lbs |
|
| Case Width with Stand | 21.96 in 55.8 cm 557.89 mm 1.83 ft |
24.1 in 61.2 cm 612.2 mm 2.01 ft |
| Case Height with Stand | 16.92 in 43 cm 429.69 mm 1.41 ft |
15.36 in 39 cm 390.2 mm 1.28 ft |
| Case Depth with Stand | 8.48 in 21.5 cm 215.46 mm 0.71 ft |
7.09 in 18 cm 180 mm 0.59 ft |
| Case Weight with Stand | 4.1 kg 9 lbs |
6.24 kg 14 lbs |
| Case Color | Black | Black |
| Hardware | ||
| Built-in Camera | No | No |
| Connectivity | 1 x 3.5 mm Audio Out 1 x HDMI 1.4 1 x D-sub |
1 x USB 3.1 (Type-C; upstream; DP; 65W) 1 x Ethernet RJ45 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out 1 x DisplayPort 1.4 (Output MST) 1 x HDMI 1.4 2 x USB 3.0 (downstream) 2 x USB 3.0 (downstream; BC 1.2) |
| Audio | ||
| Features | ||
| Cool Features | Flicker-free technology HDCP (High-bandwidth Digital Content Protection) AMD FreeSync technology Blue Light Filter |
Flicker-free technology Low Blue Light |
| Extra Features | Security lock slot | |
| Ergonomics | ||
| Case Width | 21.96 in 55.8 cm 557.89 mm 1.83 ft |
24.1 in 61.2 cm 612.2 mm 2.01 ft |
| Case Height | 13.1 in 33.3 cm 332.7 mm 1.09 ft |
13.98 in 35.5 cm 355 mm 1.16 ft |
| Vesa Mount Support | Yes | Yes |
| VESA Interface Standard Size | 100 x 100 | 100 x 100 |
| Removable VESA Stand | Yes | Yes |
| Height Adjustment | No | Yes |
| Height Adjustment Range | 130 mm 13 cm 5.1181 in 0.4265 ft |
|
| Landscape or Portrait Pivot Support | No | Yes |
| Left Pivot | 90 ° | |
| Right Pivot | 90 ° | |
| Left or Right Swivel Support | No | Yes |
| Left Swivel | 40 ° | |
| Right Swivel | 40 ° | |
| Forward and Backward Tilt Support | Yes | Yes |
| Forward Tilt | 5 ° | 5 ° |
| Backward Tilt | 15 ° | 21 ° |
| Frequency and Interpolation | ||
| Vertical Digital Frequency | 55 Hz - 75 Hz | 56 Hz - 76 Hz |
| Horizontal Digital Frequency | 30 kHz - 85 kHz | 30 kHz - 90 kHz |
| Screen Interpolation Measurement Unit | NULL | |
| Accessories | ||
| Extras | D-sub cable HDMI cable |
DisplayPort cable USB Type-C to Type-C cable |
| Certificates and Standards | ||
| Licenses | ENERGY STAR ErP TCO Certified Displays |
ENERGY STAR EPEAT TCO Certified RoHS NFPA 99 |
| Usage and Storage Requirements | ||
| Safe Operating Temperature Level | 0 °C - 40 °C 32 °F - 104 °F |
|
| Safe Operating Humidity Level | 10 % - 80 % | |
| Internal Storage Temperature | -20 °C - 60 °C -4 °F - 140 °F |
|
| Internal Storage Humidity | 5 % - 90 % | |
| Max Operating Altitude | 5000 | |
| Max Storage Altitude | 12192 |
| Acer KG251Qbiix | Dell U2721DE |
