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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.

  • Cooler Master GM27-FFS €13.02
  • iiyama XU2763HSU-B1 €6.45
  • iiyama XB2792HSU-B1 A €6.64
Model Cooler Master GM27-FFS iiyama XU2763HSU-B1 iiyama XB2792HSU-B1 A
Running cost
Running cost (per year) €13.02 €6.45 €6.64
over 10 years €130 +€66 over 10 years €65 €66 +€2 over 10 years
kWh per year 46 22.8 23.4
kg CO₂e per year from electricity use 9.7 4.8 4.9
Specifications
Brand Cooler Master iiyama iiyama
Model GM27-FFS XU2763HSU-B1 XB2792HSU-B1 A
Energy class E B B
Screen size 27″ (69 cm) 27″ (68.6 cm) 27″ (68.6 cm)
Power in on mode (SDR) 21 W 10.4 W 10.7 W
Standby 0.3 W 0.3 W 0.5 W
Off mode 0.2 W 0.3 W 0.3 W
Resolution 1920 × 1080 1920 × 1080 1920 × 1080
Aspect ratio 16:9 16:9 16:9
Panel TF-L-CD LED LCD LED LCD
Refresh rate 60 Hz 60 Hz 60 Hz
Power supply External Internal Internal
On the market since August 12, 2022 December 1, 2023 June 1, 2026
EPREL registration number 1332248 1828497 2692644
Guaranteed support – 7 years 8 years
Software updates – 8 years 8 years
Spare parts available – 7 years 7 years

Rows where the models differ are highlighted.