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3 monitors side by side.

6 h a day
  • 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.

Yearly running cost

Bars in proportion to the energy each model uses.

  • Xgaming 27G2JE €13.09
  • Cepter C27ESPORTP4 €9.92
  • Ozone OZON G2790 QHD €11.29
Model Xgaming 27G2JE Cepter C27ESPORTP4 Ozone OZON G2790 QHD
Running cost
Running cost (per year) €13.09 €9.92 €11.29
over 10 years €131 +€32 over 10 years €99 €113 +€14 over 10 years
kWh per year 46.2 35 39.9
kg CO₂e per year from electricity use 9.7 7.4 8.4
Specifications
Brand Xgaming Cepter Ozone
Model 27G2JE C27ESPORTP4 OZON G2790 QHD
Energy class E D E
Screen size 27″ (68.4 cm) 27″ (69 cm) 27″ (68.6 cm)
Power in on mode (SDR) 21.1 W 16 W 18.2 W
Standby 0.5 W 0.2 W 0.3 W
Off mode 0.3 W 0.2 W 0.2 W
Resolution 2560 × 1440 2560 × 1440 2560 × 1440
Aspect ratio 16:9 16:9 16:9
Panel LCD OLED LED LCD
Refresh rate 165 Hz 240 Hz 180 Hz
Power supply External External External
On the market since August 8, 2023 July 20, 2026 August 22, 2025
EPREL registration number 1692567 2732628 2451289
Energy class (HDR) – F –
Power in on mode (HDR) – 22 W –
Guaranteed support – 7 years 6 years
Software updates – 7 years 6 years
Spare parts available – 7 years 6 years
Networked standby – – 0 W

Rows where the models differ are highlighted.