We measure system-wide power draw from the wall while the card is sat idling at the Windows 10 desktop for 30 minutes. A reading under load comes from running the 3DMark Fire Strike Ultra stress test 20 times.
As expected, the GTX 1650 draws the least power of any graphics card on the above chart, with a peak reading of 131W. Again, we can expect lower power draw from other GTX 1650 than don't have a supplemental power connector, but even so this is still a top result.