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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.

  • iiyama B1780SD-W1 D €7.38
  • Dell E1715S €5.58
  • Philips 172B9TL €6.20
Model iiyama B1780SD-W1 D Dell E1715S Philips 172B9TL
Running cost
Running cost (per year) €7.38 €5.58 €6.20
over 10 years €74 +€18 over 10 years €56 €62 +€6 over 10 years
kWh per year 26.1 19.7 21.9
kg CO₂e per year from electricity use 5.5 4.1 4.6
Specifications
Brand iiyama Dell Philips
Model B1780SD-W1 D E1715S 172B9TL
Energy class E D D
Screen size 17″ (43.3 cm) 17″ (43.2 cm) 17″ (43.2 cm)
Power in on mode (SDR) 11.9 W 9 W 10 W
Standby 0.4 W 0.2 W 0.3 W
Off mode 0.3 W 0.2 W 0.3 W
Resolution 1280 × 1024 1280 × 1024 1280 × 1024
Aspect ratio 5:4 4:3 5:4
Panel LED LCD LED LCD LCD
Refresh rate 60 Hz 60 Hz 60 Hz
Power supply Internal Internal External
Guaranteed support 7 years 7 years 8 years
Software updates 8 years 8 years 8 years
Spare parts available 7 years 7 years 7 years
On the market since March 1, 2021 February 6, 2014 August 22, 2020
EPREL registration number 389715 344935 393967

Rows where the models differ are highlighted.