PCI Express (PCIe) 6pin power Connector Pinout - AllPinouts
This connector is used to provide extra 12 volt power to PCI Express expansion cards. Many video cards draw significantly more than 75 watts provided by the motherboard slot, so the 6 pin PCI Express power cable was created. These high-power cards draw most of their power from the 12 volt rail so this cable provides only 12 volts. These are sometimes called "PCI Express cables". They are also occasionally called "PEG cables" where "PEG" stands for PCI Express Graphics.
|2||12V or NC||yellow||+12 V or not connected|
Connector part numbers
Video card connector: Molex 45558-0002 Cable connector: Molex 45559-0002 Terminals: Molex 39-00-0168, Molex 44476-1111 Maximum current per circuit: 8 amps