A standard PCIe x16 slot can provide up to 75W of power. If you add another 150W from an 8-pin connector, you're looking at 225W from the motherboard alone.

The latest version lets users choose to use it, or a standard Nvidia 16-pin 12V-2x6 connector, but even when using the Asus option, the 12V-2x6 has to plug into the rear of the motherboard to ...