<Li> ATX12V 4 - pin power connector (also called the P4 power connector). A second connector that goes to the motherboard (in addition to the main 24 - pin connector) to supply dedicated power for the processor . For high - end motherboards and processors, more power is required, therefore EPS12V has an 8 - pin connector . </Li> <Ul> <Li> 4 - pin Peripheral power connectors: These are the other, smaller connectors that go to the various disk drives of the computer . Most of them have four wires: two black, one red, and one yellow . Unlike the US standard mains electrical wire color - coding, each black wire is a ground, the red wire is + 5 V, and the yellow wire is + 12 V. In some cases these are also used to provide additional power to PCI cards such as FireWire 800 cards . </Li> <Li> 4 - pin Molex (Japan) Ltd power connectors (usually called Mini-connector, mini-Molex, or Berg connector): This is one of the smallest connectors that supplies a 3.5 - inch floppy drive with power . In some cases, it can be used as an auxiliary connector for Accelerated Graphics Port (AGP) video cards . Its cable configuration is similar to the Peripheral connector . </Li> <Li> Auxiliary power connectors: There are several types of auxiliary connectors designed to provide additional power if it is needed . </Li> <Li> Serial ATA power connectors: a 15 - pin connector for components which use SATA power plugs . This connector supplies power at three different voltages: + 3.3, + 5, and + 12 V . </Li> <Li> 6 - pin Most modern computer power supplies include six - pin connectors that are generally used for PCI Express graphics cards, but a newly introduced eight - pin connector should be seen on the latest model power supplies . Each PCI Express 6 - pin connector can output a maximum of 75 W . </Li> <Li> 6 + 2 pin For the purpose of backwards compatibility, some connectors designed for use with high end PCI Express graphics cards feature this kind of pin configuration . It allows either a six - pin card or an eight - pin card to be connected by using two separate connection modules wired into the same sheath: one with six pins and another with two pins . Each PCI Express eight - pin connector can output a maximum of 150 W . </Li> <Li> An IEC 60320 C14 connector with an appropriate C13 cord is used to attach the power supply to the local power grid . </Li> </Ul> <Li> 4 - pin Peripheral power connectors: These are the other, smaller connectors that go to the various disk drives of the computer . Most of them have four wires: two black, one red, and one yellow . Unlike the US standard mains electrical wire color - coding, each black wire is a ground, the red wire is + 5 V, and the yellow wire is + 12 V. In some cases these are also used to provide additional power to PCI cards such as FireWire 800 cards . </Li> <Li> 4 - pin Molex (Japan) Ltd power connectors (usually called Mini-connector, mini-Molex, or Berg connector): This is one of the smallest connectors that supplies a 3.5 - inch floppy drive with power . In some cases, it can be used as an auxiliary connector for Accelerated Graphics Port (AGP) video cards . Its cable configuration is similar to the Peripheral connector . </Li>

What does a mother board do in a computer