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In this situation, follow the instructions of the fan controller system to get it installed into your computer’s case. Many models allow for control over each fan, and in some cases and can remove a lot of frustration when trying to set up a fan speed curve profile. Using add-on fan controllersįor some enthusiasts, adding an independent fan controller system is a more desirable option. Make sure that the fan’s plug groove is aligned with the pin header clip. Then plug your fan connector into the pin header connection on the PCB adapter the same way as described for a motherboard connector. Power Supply to Fan Pin Header Adapter Board Note: Pin 1 will always be marked on any circuit board. If you don’t have the luxury of things being like they are supposed to, simply match the color of the wires to the correct pin number shown in the pin-out table above. Simply align the fan’s connector housing slot to match the shroud clip on the header on the motherboard end. If you find that your fan has only a 3 pin Molex connector, while your motherboard only offers a 4 pin connector, all is good.
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How to connect a 3 pin fan to a 4 pin Molex connector Motherboards usually have the designation name of the connector on the silkscreen print. Usually, you will find the connector housing will match with a clip on the back of the pin header connector on the motherboard.Īlso, double-check that you are in fact plugging the fan connector into a fan connector header.
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You can easily create fan speed profiles either using your BIOS or with third-party software like SpeedFan.Īll you have to watch out for when plugging a fan connector onto the motherboard connector is that it goes on the correct way.
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The 4 pin header has everything the 3 pin connector offers, plus an extra pin for PWM (Pulse Width Modulation) which can add speed control to your fan without the need for an extra speed control circuit. The 3 pin header includes a pin for ground power or negative (-), and for positive power (+), and the third pin for an RPM (Revolutions Per Minute) sensor. Most motherboards include fan connector headers that either have 3 or 4 pins.
Important: Always make sure that your computer has been turned off and isn’t connected to power before connecting or disconnecting any fans. This can lead to poorer cooling compared to that of which you had before adding the new fan(s) and I’m sure that wouldn’t have been the desired outcome from anyone adding more fans.
This is a handy first step to understand before adding more fans.Īdding fans that are mounted the wrong way, or that are placed in the wrong area of the computer case could detract from the overall cooling strategy of your system.
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In our other article about PC airflow optimization, we discuss how you should set up the airflow and air pressure type. Cases generally provide more than enough fan mount areas so you don’t have to worry about your computer overheating. With most computer cases today, adding more fans is easy enough for most people to do. Not only do the connection types differ to various computer fans, but how you attach them is also important. We will cover everything you need to know about how to connect extra fans to your PC.