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4 monitors side by side.

Country

Hours a day

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.

Show only differences

Model	Dahua DHI-LM34-E330CA	AOC CU34E4CW	ASUS VU34WCIP-W	MSI PRO MP341CQPHG E12
Running cost
Running cost (per year)	€17.99	€12.40	€15.07	€15.51
over 10 years	€180 +€56 over 10 years	€124	€151 +€27 over 10 years	€155 +€31 over 10 years
kWh per year	63.5	43.8	53.2	54.8
kg CO₂e per year from electricity use	13	9.2	11	11
Specifications
Brand	Dahua	AOC	ASUS	MSI
Model	DHI-LM34-E330CA	CU34E4CW	VU34WCIP-W	PRO MP341CQPHG E12
Energy class	F	D	E	E
Screen size	34″ (86.4 cm)	34″ (86.4 cm)	34″ (86.4 cm)	34″ (86.4 cm)
Power in on mode (SDR)	29 W	20 W	24.3 W	25 W
Energy class (HDR)	G	G	G	G
Power in on mode (HDR)	40 W	46 W	34.7 W	40 W
Standby	0.3 W	0.5 W	0.5 W	0.5 W
Off mode	0.2 W	0.3 W	0.3 W	0.3 W
Resolution	3440 × 1440	3440 × 1440	3440 × 1440	3440 × 1440
Aspect ratio	21:9	21:9	21:9	21:9
Panel	LED LCD	LED LCD	LED LCD	LCD
Refresh rate	60 Hz	60 Hz	60 Hz	60 Hz
Power supply	External	Internal	External	Internal
Guaranteed support	15 years	8 years	7 years	3 years
Software updates	8 years	8 years	8 years	8 years
Spare parts available	7 years	7 years	7 years	3 years
On the market since	June 10, 2025	October 15, 2025	January 6, 2025	April 20, 2026
EPREL registration number	2383609	2418682	2205883	2664456
Networked standby	–	2 W	–	–

Rows where the models differ are highlighted.