Compare models
2 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
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Yearly running cost
Bars in proportion to the energy each model uses.
- KTC ZN27OL240 €21.40
- BenQ EX270QM €15.57
| Model | KTC ZN27OL240 | BenQ EX270QM |
|---|---|---|
| Running cost | ||
| Running cost (per year) | €21.40 | €15.57 |
| over 10 years | €214 +€58 over 10 years | €156 |
| kWh per year | 75.6 | 55 |
| kg CO₂e per year from electricity use | 16 | 12 |
| Specifications | ||
| Brand | KTC | BenQ |
| Model | ZN27OL240 | EX270QM |
| Energy class | G | F |
| Screen size | 27″ (67 cm) | 27″ (68.5 cm) |
| Power in on mode (SDR) | 34.5 W | 25.1 W |
| Energy class (HDR) | G | G |
| Power in on mode (HDR) | 36.5 W | 54.8 W |
| Standby | 0.4 W | 0.4 W |
| Off mode | 0.2 W | 0.3 W |
| Resolution | 2560 × 1440 | 2560 × 1440 |
| Aspect ratio | 16:9 | 16:9 |
| Panel | OLED | LED LCD |
| Refresh rate | 240 Hz | 240 Hz |
| Power supply | External | External |
| On the market since | October 11, 2024 | August 15, 2022 |
| EPREL registration number | 2168005 | 1265424 |
| Guaranteed support | – | 7 years |
| Software updates | – | 8 years |
| Spare parts available | – | 7 years |
Rows where the models differ are highlighted.