For those looking for more power from pin 3, don’t forget that the PCI-E slot itself draws up to 75W of power. 150W (pin 1), 150W (pin 2), 75W (pin 3), and 75W (PCI-E slot) totals 450W. Also, keep in mind that you won’t always been drawing 450W as it really depends on what load the card is under. And, as a reminder, software readings of power draw aren’t always accurate. For higher accuracy, use a multimeter or a clamp meter.