Comparison · Power supplies

5 V 8 A power supply (40 W) or 12 V 40 W power supply

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Test current: 5 V 8 A power supply (40 W) (11.6 A vs. 3.4); Ripple: 5 V 8 A power supply (40 W) (40 mV vs. 650); Efficiency: 12 V 40 W power supply (84 % vs. 74); Temperature rise: 12 V 40 W power supply (60 °C vs. 135).

Model	5 V 8 A power supply (40 W)2026Read review →	12 V 40 W power supply2025Read review →
Current, A	8	3.33
Power, W	40	40
Test current, A	11.6	3.4
Ripple, mV	40	650
Efficiency, %	74	84
Temperature rise, °C	135	60
Review conclusion	Recommended	Recommended

Only in one review: Voltage 5 V (5 V 8 A power supply (40 W)); No load 0.1 W (12 V 40 W power supply); Protection 11.6 A (5 V 8 A power supply (40 W)).

5 V 8 A power supply (40 W): A very good unit that handles 10 A with low ripple, though the inductor overheats under sustained load.

12 V 40 W power supply: A decent supply with closely set protection, suitable for LED strips; ripple is high for sensitive devices.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.