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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.
  • Planar

    PXN2490MW-WH
    F 24″QHDLCD / LED

    €13.15 per year

    +€4.47 a year

  • Cheapest to run

    AOC

    Q24B36X
    D 24″QHDLCD / LED

    €8.68 per year

  • Dell

    P2425D
    E 24″QHDLCD / LED

    €9.68 per year

    +€0.99 a year

  • iiyama

    XUB2492QSU-B1 A
    E 24″QHDLCD / LED

    €9.74 per year

    +€1.05 a year

Yearly running cost

Bars in proportion to the energy each model uses.

  • Planar PXN2490MW-WH €13.15
  • AOC Q24B36X €8.68
  • Dell P2425D €9.68
  • iiyama XUB2492QSU-B1 A €9.74
Model Planar PXN2490MW-WH AOC Q24B36X Dell P2425D iiyama XUB2492QSU-B1 A
Running cost
Running cost (per year) €13.15 €8.68 €9.68 €9.74
over 10 years €131 +€45 over 10 years €87 €97 +€10 over 10 years €97 +€11 over 10 years
kWh per year 46.4 30.7 34.2 34.4
kg CO₂e per year from electricity use 9.7 6.4 7.2 7.2
Specifications
Brand Planar AOC Dell iiyama
Model PXN2490MW-WH Q24B36X P2425D XUB2492QSU-B1 A
Energy class F D E E
Screen size 24″ (60.5 cm) 24″ (60.4 cm) 24″ (60.5 cm) 24″ (60.4 cm)
Power in on mode (SDR) 21.2 W 14 W 15.6 W 15.7 W
Standby 0.2 W 0.5 W 0.3 W 0.5 W
Off mode 0.2 W 0.3 W 0.3 W 0.3 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 LED LCD LED LCD
Refresh rate 60 Hz 60 Hz 60 Hz 60 Hz
Power supply Internal External Internal Internal
On the market since April 1, 2020 November 15, 2025 March 6, 2025 October 1, 2024
EPREL registration number 580323 2486294 2151579 2083266
Energy class (HDR) – G – –
Power in on mode (HDR) – 30 W – –
Guaranteed support – 8 years 7 years 7 years
Software updates – 8 years 8 years 8 years
Spare parts available – 7 years 7 years 7 years

Rows where the models differ are highlighted.