ATXv12- add power support for the motherboard by adding another 4-pin power connector.
Most connectors today are keyed connector.
Keyed connectors are designed to be inserted in only one direction.
Power Color Codes
Power Supply Ground: Used to complete circuits with other voltages BLACK 0V ISA bus cards and early PROMS WHITE -5V Motherboard, Baby AT and earlier CPUs, and many motherboard components RED +5V Most newer CPUs, some types of system memory and AGP video slots ORANGE +3.3V Some types of serial port circuits and early Programmable Read Only Memory (PROM) BLUE -12V Disk drive motors, fans, cooling devices, and system bus slots YELLOW +12V ATXv12 Power Supply ATX Power Supply AT Power Supply Use Wire Color Voltage