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4 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.
  • Cooler Master

    GP2711
    F 27″QHDLCD / LED165 Hz

    €14.70 per year

    +€6.95 a year

  • Nilox

    NXM27CV2K2001
    E 27″QHDLCD / LED200 Hz

    €12.71 per year

    +€4.96 a year

  • Cheapest to run

    Gamepower

    RAPID Q-MAX
    E 27″QHDLCD / LED300 Hz

    €7.75 per year

  • Cepter

    C27ESPORTP4
    D 27″QHDOLED240 Hz

    €9.92 per year

    +€2.17 a year

Yearly running cost

Bars in proportion to the energy each model uses.

  • Cooler Master GP2711 €14.70
  • Nilox NXM27CV2K2001 €12.71
  • Gamepower RAPID Q-MAX €7.75
  • Cepter C27ESPORTP4 €9.92
Model Cooler Master GP2711 Nilox NXM27CV2K2001 Gamepower RAPID Q-MAX Cepter C27ESPORTP4
Running cost
Running cost (per year) €14.70 €12.71 €7.75 €9.92
over 10 years €147 +€69 over 10 years €127 +€50 over 10 years €78 €99 +€22 over 10 years
kWh per year 51.9 44.9 27.4 35
kg CO₂e per year from electricity use 11 9.4 5.7 7.4
Specifications
Brand Cooler Master Nilox Gamepower Cepter
Model GP2711 NXM27CV2K2001 RAPID Q-MAX C27ESPORTP4
Energy class F E E D
Screen size 27″ (68.5 cm) 27″ (68.2 cm) 27″ (68.6 cm) 27″ (69 cm)
Power in on mode (SDR) 23.7 W 20.5 W 12.5 W 16 W
Energy class (HDR) E – – F
Power in on mode (HDR) 20.6 W – – 22 W
Standby 0.5 W 0.3 W 0.3 W 0.2 W
Networked standby 2 W – 0.4 W –
Off mode 0.3 W 0.2 W 0.3 W 0.2 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 LCD OLED
Refresh rate 165 Hz 200 Hz 300 Hz 240 Hz
Power supply External External External External
Guaranteed support 8 years 3 years – 7 years
Software updates 9 years 5 years – 7 years
Spare parts available 8 years 5 years – 7 years
On the market since August 23, 2023 July 25, 2025 December 27, 2024 July 20, 2026
EPREL registration number 1718876 2388209 2231840 2732628

Rows where the models differ are highlighted.