Compare models
4 monitors side by side.
- Electricity at €0.2832 per kWh (household price with taxes, Eurostat 2026-S1).
- 210 g CO₂e per kWh generated in 2023 (European Environment Agency). Counts use only, not manufacturing.
Electricity prices in all EU countries
Yearly running cost
Bars in proportion to the energy each model uses.
- ViewSonic VS21367(VX2738-2K) €13.02
- iiyama X2792QSU-B1 A €6.64
- ASUS VA27AQSE €8.06
- AOC Q27P4U €8.06
| Model | ViewSonic VS21367(VX2738-2K) | iiyama X2792QSU-B1 A | ASUS VA27AQSE | AOC Q27P4U |
|---|---|---|---|---|
| Running cost | ||||
| Running cost (per year) | €13.02 | €6.64 | €8.06 | €8.06 |
| over 10 years | €130 +€64 over 10 years | €66 | €81 +€14 over 10 years | €81 +€14 over 10 years |
| kWh per year | 46 | 23.4 | 28.5 | 28.5 |
| kg CO₂e per year from electricity use | 9.7 | 4.9 | 6 | 6 |
| Specifications | ||||
| Brand | ViewSonic | iiyama | ASUS | AOC |
| Model | VS21367(VX2738-2K) | X2792QSU-B1 A | VA27AQSE | Q27P4U |
| Energy class | E | B | C | C |
| Screen size | 27″ (69 cm) | 27″ (68.5 cm) | 27″ (68.5 cm) | 27″ (68.5 cm) |
| Power in on mode (SDR) | 21 W | 10.7 W | 13 W | 13 W |
| Energy class (HDR) | G | – | G | C |
| Power in on mode (HDR) | 34 W | – | 37 W | 13 W |
| Standby | 0.5 W | 0.5 W | 0.5 W | 0.3 W |
| Networked standby | 0 W | – | – | – |
| Off mode | 0.3 W | 0.3 W | 0.3 W | 0.3 W |
| Resolution | 2560 × 1440 | 2560 × 1440 | 2560 × 1440 | 2560 × 1440 |
| Aspect ratio | 16:9 | 16:9 | 16:9 | 16:9 |
| Panel | LED LCD | LED LCD | LED LCD | LED LCD |
| Refresh rate | 60 Hz | 60 Hz | 60 Hz | 60 Hz |
| Power supply | Internal | Internal | Internal | Internal |
| Guaranteed support | 8 years | 8 years | 7 years | 8 years |
| Software updates | 9 years | 8 years | 8 years | 8 years |
| Spare parts available | 8 years | 7 years | 7 years | 7 years |
| On the market since | June 24, 2026 | June 1, 2026 | July 14, 2025 | July 3, 2025 |
| EPREL registration number | 2768414 | 2702610 | 2378081 | 2377208 |
Rows where the models differ are highlighted.