The power supply blows air over the CPU rather ... but to place all the connectors directly on the motherboard. Prior to the ATX, only the keyboard connector was attached to the motherboard.
which can supply up to 600 watts of power through a single connector. PCIe x4 and x8 cards can draw up to 25W from the motherboard's slot, while x1 cards are limited to 10W unless configured as a ...