What is the recommended power supply wattage and what are the power connector requirements?

ASUS recommends using a power supply unit (PSU) that complies with ATX 12V Specification 2.0 or later and provides a minimum of 350W for a fully configured system. If you plan to use two or more high-end PCIe x16 cards, a PSU of 1000W or above is recommended to ensure system stability. You must connect the 8-pin power plug, or both the 8-pin and 4-pin power plugs to the motherboard.