Then turn off the power supply by using the switch on the back of the power supply by turning it to the off position and don’t forget to unplug the P1 plug from the motherboard. Once you have finished testing remove the probes from the P1 plug and turn off your meter. The yellow wire is a 12 volt wire and should read somewhere between 10.8 volts and 13.2 volts. Now remove the red probe from the red wire and connect it to the yellow wire. Once again since this is a red wire, it is a 5 volt wire and should read somewhere in the range of 4.5 to 5.5 volts. Then place the red probe into the red wire. The blue wire is a (negative) -12 volt wire and should read somewhere between -10.8 volts to -13.2 volts. Now test the blue wire by removing the red probe from the orange wire and sliding it into the P1 plug where the blue wire is. Since the orange wire is a 3.3 volt wire it should read somewhere between 3.0 volts and 3.63 volts. ![]() Start by testing the orange wire by placing the red probe into the back of the P1 plug where the orange wire is. Once the ground is in place you can leave it there while we test the other wires. The conclusion of this article is that a 2-pin fan may be connected to a 4-pin motherboard, however, an adapter is recommended.Now to test the P1 (10x2) 20 pin plug you will want to slide the black probe into one of the black (ground) wires in the back of the P1 plug while it is still connected. Make sure it goes down far enough to make contact. A 4-pin motherboard connector is a connector that connects a motherboard to a 4-pin power supply. Last WordsĪ 2-pin fan connector is a type of power supply connector that connects a fan to a motherboard. Another benefit of employing a 2-pin fan is that it allows users additional alternatives for fan installation. This provides for improved cooling and noise reduction. The 2-pin fan’s key advantage is that it can be controlled by the motherboard, allowing the fan’s speed to be modified according to the system’s requirements. The black wire serves as a ground wire, while the yellow wire serves as a 12V power line, the red wire serves as a 5V power wire, and the blue wire serves as a 3.3V power wire. Some power supply has both connectors, while others only have the 4-pin.Ī black wire, a yellow wire, a red wire, and a blue wire make up the 4-pin connector. This 4-pin connector is seen on greater power supplies, such as those used by graphics cards. The 4-pin connector is larger and more rectangular than the 2-pin connector. This will allow you to connect the fan to the motherboard‘s 4-pin header and then use the adapter. Using a 4-pin to 2-pin adaptor is another option. ![]() This is the simplest method, but it can also be the most costly. You can use a fan splitter to connect the fan to one of the motherboard’s 4-pin headers and then split the signal into two 2-pin connectors. Different Ways of ConnectionĪ 2-pin fan can be connected to a 4-pin motherboard in a few different ways.
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