How To Connect Multiple rgb Fans To Motherboard

How To Connect Multiple rgb Fans To Motherboard

So you have a case with dual 5.25″ drive bays, and want to put 2 RGB fans up front as intake, but your motherboard only has one rgb header. I ran into this problem as well, so I decided to figure out exactly how many rgb fans my motherboard could control from the rgb header provided. The answer is four. Can you use more fans than your motherboard can control? Sure, but there is no guarantee it will work.

This page details how I tested which computers can power multiple rgb fans with an rgb header. If you want the short answer without the possible issues of powering too many fans read the summary .

How To Connect Multiple rgb Fans To Motherboard

FAN TESTING METHODOLOGY: I tested multiple ways to power the fans. Connecting fans directly to 12v with molex, connecting fans via a splitter, and each combination of daisy chaining rgb headers together. I chose three different types of rgb headers:

  1. A split header with two sets of wires running out in opposite directions, where either side will work with rp- rgb fans.
  2.  A header with three sets of wires running out in opposite directions, where either side will work with rp- rgb fans.
  3. A single wired strip from the split header connected to a motherboard’s 4pin rgb header via a splitter cable that came with a corsair k70 keyboard.

The testing consisted of powering all four fans with a fan controller and recording the RPMs of each fan. I did not hook up any sensors to measure voltage, so keep in mind that my results are just estimated.

NOTE: All images can be expanded by clicking on them for a larger view. I was not provided with any corsair products for this test, everything used is personally owned.

FAN SETUP EXAMPLES: A 120mm rgb fan can be plugged into a motherboard’s 4pin header via a splitter cable since the wire gauge of the split header and a corsair k70 rgb keyboard’s splitter are 24awg. Three fans on a split header which has 30awg wires will not work. I used a multimeter to test the thickness of the wires in various rgb headers.

ALL FANS WERE CONNECTED TO A SINGLE CONTROLLER, ALL TESTING WAS DONE AT THE SAME TIME USING SMALL DISTANCE BETWEEN FANS TO KEEP VARIABLES TO A MINIMUM

MOTHERBOARD FAN CONTROLLER TESTING: I tested how many fans a motherboard’s rgb header could power from the controller itself. I used a corsair link Commander pro and an asus aura sync capable motherboard to test this. The commander pro’s rgb header is rated for 18 watts, while the asus aura sync header is rated for 3.3v at 12v (4.74 watts).

FAN RPMs (CURRENT LIMIT) CONCLUSION: If you can’t find your motherboard model or year anywhere on this list your motherboard does not support more than one rgb header connected to the rgb header. If your motherboard only has one rgb header it is most likely an 18 watt 4pin header, but search for your model just in case.

Note: The hardware tested is owned by me and was not provided by corsair. I am not responsible for any damage you may cause during this modification.

The information in this article does not reflect the official view or opinions of corsair and is purely the work of the author.

HIGH POWER FAN WIRING: You can wire rgb fans to a motherboard directly via 12v with molex, but i wouldn’t recommend it because you could burn out your fan controller’s power supply if its not powerful enough.

You can wire rgb fans to each other like daisy chaining your motherboard’s rgb header, this is how I tested all 4 fans at once. rgb fans can be wired together via 12v with molex using the daisy chain method, but only if the voltage of the first fan is not greater than 3 volts (12v x 3 = 36 watts = max of one rgb header).

The first fan of the daisy chain must be powered by 12v with molex. Fans connected via daisy chain will not work if they are on separate headers, only if they are all connected to the same motherboard’s or fan controller’s rgb header. If you want to feed 12v to a fan header make sure you use the proper voltage for that header. If the rgb, pwm, or molex fan connector has a small led in it then its voltage is 5v and not 12v.


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Brent Justice
By Brent Justice

My name is Brent Justice and I am a passionate tech reviewer. I believe there should be a strong relationship between price and features. If the price doesn't match UX or requirements then I will not recommend them.



Productxy is reader-supported. When you buy through links on our site, we may earn an affiliate commission.

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