20 pin 12v atx power connector definition

#20 pin 12v atx power connector definition serial#

Yellow (+12V): Generally, it provides power supply for spindle motor and seek motor of hard disk, optical drive and floppy drive, and provides working voltage and serial port circuit logic signal level for ISA slot.

(Power is still supplied after shutdown)ĩ. Purple (+5VSB): ATX power supply provides + 5V 720mA power supply to the motherboard through pin9, which provides power for WOL (wake up on LAN) and boot circuit, USB interface and other circuits. White (-5V): It provides a method to judge the level for logic circuit and is not essential.Ĩ. Gray (PWR_OK): Monitoring line, which plays a signal feedback role.ħ. When it is short circuited to the ground, it will start the power supply.Ħ. The p/n for a standard P4 is 39-01-2040 or equivalent. Some PSUs may have three or four 12 volt 4-pin connectors. When the signal level of the port is greater than 1.8V, the main power is off If the signal level is lower than 1.8V, the main power supply is on. Most of today's motherboards supply their CPU with a separate 12 volt cable, which has 4 pins for ATX style (sometimes called P4) or 8 or more pins for EPS and non-standard high-power systems. Green (PS_ON): Through the electrical level control power on. The quality of its power supply is directly related to the stability of the computer system.ĥ. Red (5V): The working voltage provided to CPU, PCI, AGP, ISA and other integrated circuits is the main working power supply in computer. If several parts share a common ground wire, its work efficiency will be greatly reduced. Tips: ATX power supply is divided into several parts, each part must have a ground wire. Black (0V): The power line is ground line, and other power lines need to be used in conjunction with it to supply power for the computer. The required current is small, generally less than 1 ampere.ģ. Blue (-12V): Provides logic judgment level for serial port.

The voltage requirement is strict, the output is stable, the ripple coefficient is small, and the output current is large, which needs more than 20 amperes.Ģ. Orange (+3.3V): Provides power for memory. The work of this connector supplies power to the entire motherboard. There are nine kinds of colors on connector as the following picture and they have different functions.ġ. The largest power connector in SMPS is called a 20+4 pin ATX power connector. What is the pin of different colors on connector for Power the fan, monitor and control the fan speed of CPUĢ. Power to old IDE devices, such as hard disk and optical drive of IDE connector The Molex 4-pin power supply connector is one of the standard peripheral power connectors in computers today. Power hard drives and optical drives (15 pin, 5-wire) There are six kinds of common connectors. Due to larger current required for higher performance of CPU and AGP, +12V power connector is added because 20-pin connector cannot afford required voltage due.

20 pin 12v atx power connector definition