Red: indicates the 5V power cable (the operating voltage of the chip on hardware such as the mainboard, hard disk, and optical drive).
Yellow: indicates the 12V power cable (the operating voltage of hardware such as hard disks, CD-ROM drives, and fans, and the -12V power supply to the serial port at the same time).
Orange: indicates a 3.3V power cable that directly supplies power to the DIMM and AGP slots.
Gray: represents P.G signal line (power status information line, it is the result of other power lines through a certain circuit calculation, when the computer is pressed at the beginning of the key, this signal indicates that the power supply is good can be turned on no signal indicates that there is a fault motherboard automatic monitoring).
Blue: indicates the -12V power cable that provides EIA power to the serial port.
White: represents the -5V power cord (FDD phase-locked data separation circuit).
Purple: represents the 5V StandBy power cord (powering a small portion of the circuit on the motherboard after shutdown to detect various boot commands).
Green: represents the PS-ON signal line (motherboard power on\/off signal line, not connected to a certain voltage, you can directly connect a switch relative to the black line as a test, it can also be regarded as the power button at startup).
Black: Ground cable of the system circuit.
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Computer power cable connection method:
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1, first of all, the motherboard power supply at present, most of the motherboard is 24PIN interface, we also have 24PIN interface in the power supply, the corresponding insertion can be, the connection has anti-stupid design, so generally will not be inserted wrong.
2, after the motherboard power supply connection is completed, the next installed CPU power supply 4-PIN interface can be connected to the corresponding slot position.
3, and then the hard disk power supply, hard disk power supply is also a 4PIN interface, as long as the corresponding access to the hard disk interface.
4, if your computer is also installed with an independent graphics card, generally a better independent graphics card requires a separate power supply, and a poor independent graphics card is powered by the motherboard inserted into the motherboard. Generally, the graphics card interface that requires a separate power supply is also 4-PIN, similar to the CPU power supply interface.
5, motherboard jumper, which is also a headache for many novice friends installed, mainly related to the power chassis boot button, restart button and chassis power indicator line connection.