Compare models
3 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
- Cheapest to run
- Add a model Use the Compare buttons on any of the monitors.
Yearly running cost
Bars in proportion to the energy each model uses.
- ASUS XG34WCDMS €16.13
- AOC CU34E4CW €12.40
- Hgfrtee B340QQU16 €4.96
| Model | ASUS XG34WCDMS | AOC CU34E4CW | Hgfrtee B340QQU16 |
|---|---|---|---|
| Running cost | |||
| Running cost (per year) | €16.13 | €12.40 | €4.96 |
| over 10 years | €161 +€112 over 10 years | €124 +€74 over 10 years | €50 |
| kWh per year | 56.9 | 43.8 | 17.5 |
| kg CO₂e per year from electricity use | 12 | 9.2 | 3.7 |
| Specifications | |||
| Brand | ASUS | AOC | Hgfrtee |
| Model | XG34WCDMS | CU34E4CW | B340QQU16 |
| Energy class | E | D | C |
| Screen size | 34″ (86.8 cm) | 34″ (86.4 cm) | 34″ (85 cm) |
| Power in on mode (SDR) | 26 W | 20 W | 8 W |
| Energy class (HDR) | G | G | – |
| Power in on mode (HDR) | 34 W | 46 W | – |
| Standby | 0.5 W | 0.5 W | 0.1 W |
| Off mode | 0.3 W | 0.3 W | 0 W |
| Resolution | 3440 × 1440 | 3440 × 1440 | 3440 × 1440 |
| Aspect ratio | 21:9 | 21:9 | 16:9 |
| Panel | OLED | LED LCD | LCD |
| Refresh rate | 60 Hz | 60 Hz | 165 Hz |
| Power supply | Internal | Internal | External |
| Guaranteed support | 7 years | 8 years | 1 year |
| Software updates | 8 years | 8 years | 1 year |
| Spare parts available | 7 years | 7 years | 1 year |
| On the market since | March 23, 2026 | October 15, 2025 | March 18, 2026 |
| EPREL registration number | 2613441 | 2418682 | 2665077 |
| Networked standby | – | 2 W | – |
Rows where the models differ are highlighted.