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
- Add a model Use the Compare buttons on any of the monitors.
Yearly running cost
Bars in proportion to the energy each model uses.
- Shenzhen Test Display CX123-P €4.34
- ASUS XG129C €3.72
| Model | Shenzhen Test Display CX123-P | ASUS XG129C |
|---|---|---|
| Running cost | ||
| Running cost (per year) | €4.34 | €3.72 |
| over 10 years | €43 +€6 over 10 years | €37 |
| kWh per year | 15.3 | 13.1 |
| kg CO₂e per year from electricity use | 3.2 | 2.8 |
| Specifications | ||
| Brand | Shenzhen Test Display | ASUS |
| Model | CX123-P | XG129C |
| Energy class | A | C |
| Screen size | 12″ (31.2 cm) | 12″ (31 cm) |
| Power in on mode (SDR) | 7 W | 6 W |
| Energy class (HDR) | D | – |
| Power in on mode (HDR) | 13 W | – |
| Standby | 2.5 W | 0.2 W |
| Networked standby | 0 W | – |
| Off mode | 0.3 W | 0.2 W |
| Resolution | 1920 × 720 | 1920 × 720 |
| Aspect ratio | 8:3 | 16:6 |
| Panel | LED LCD | LCD |
| Refresh rate | 60 Hz | 75 Hz |
| Power supply | Internal | External |
| Guaranteed support | 3 years | 7 years |
| Software updates | 5 years | 8 years |
| Spare parts available | 3 years | 7 years |
| On the market since | January 23, 2026 | March 6, 2026 |
| EPREL registration number | 2610036 | 2504872 |
Rows where the models differ are highlighted.