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 for 30 minutes.
Lastly, as for our power draw figures, there's nothing to split between the two BIOS as they are operating at essentially the same clocks speeds. That puts power draw around 25W above the GTX 1650, but still less than GTX 1060. RX 580, which is closely matched in terms of gaming performance, draws almost double the amount of power as this Strix card.