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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.

  • AOC CU34E4CW €12.40
  • ASUS VU34WCIP-W €15.07
  • Hgfrtee B340QQU16 €4.96
Model AOC CU34E4CW ASUS VU34WCIP-W Hgfrtee B340QQU16
Running cost
Running cost (per year) €12.40 €15.07 €4.96
over 10 years €124 +€74 over 10 years €151 +€101 over 10 years €50
kWh per year 43.8 53.2 17.5
kg CO₂e per year from electricity use 9.2 11 3.7
Specifications
Brand AOC ASUS Hgfrtee
Model CU34E4CW VU34WCIP-W B340QQU16
Energy class D E C
Screen size 34″ (86.4 cm) 34″ (86.4 cm) 34″ (85 cm)
Power in on mode (SDR) 20 W 24.3 W 8 W
Energy class (HDR) G G –
Power in on mode (HDR) 46 W 34.7 W –
Standby 0.5 W 0.5 W 0.1 W
Networked standby 2 W – –
Off mode 0.3 W 0.3 W 0 W
Resolution 3440 × 1440 3440 × 1440 3440 × 1440
Aspect ratio 21:9 21:9 16:9
Panel LED LCD LED LCD LCD
Refresh rate 60 Hz 60 Hz 165 Hz
Power supply Internal External External
Guaranteed support 8 years 7 years 1 year
Software updates 8 years 8 years 1 year
Spare parts available 7 years 7 years 1 year
On the market since October 15, 2025 January 6, 2025 March 18, 2026
EPREL registration number 2418682 2205883 2665077

Rows where the models differ are highlighted.