Did I damage my fans?

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w0rmh0lez

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Sep 29, 2013
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Hello guys! I have 8 PWM fans on a radiator and also a PWM controlled pump. I bought 2 of these: http://www.swiftech.com/8-WayPWMsplitter.aspx

I connected 8 fans to the first splitter, the connected the PWM connector from the splitter to the second splitter and connected the pump to that one, then I took the PWM connector from that one and connected it to my motherboards CPU_FAN header. However it did not work and only the pump was able to be controlled while the fans just ran at full speed.

I am assuming this is because the PWM signal was spread to thin. However I am concerned if this did any damage to my fans or splitter?

I did it like this because my motherboard only has 1 PWM header :/ so its the only way I could get everything to work.
 
Solution
D
Your fans are fine. The PWM signal only tells them how fast to rotate, a lack of signal won't damage them. My suspicion is that the controller isn't working, try plugging one fan into the MB head to make sure it works and then plug it into the splitter without anything else to see if your splitter is working properly.
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dish_moose

dish_moose

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Jul 7, 2010
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Let me get this right. You connected 8 fans and a pump to a header meant to power ONE cpu fan? I would test a single cpu fan on the header to see if it still works - I think you have damaged your mobo.
-Bruce
Edit - my bad - should have looked at the hardware you were using. I see the set-up uses the cpu fan header for the control only - not to power all fans. Tnx i7Baby
 
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ddpruitt

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Jun 4, 2012
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Your fans are fine. The PWM signal only tells them how fast to rotate, a lack of signal won't damage them. My suspicion is that the controller isn't working, try plugging one fan into the MB head to make sure it works and then plug it into the splitter without anything else to see if your splitter is working properly.
 
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someguynamedmatt

someguynamedmatt

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Feb 7, 2010
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Power distribution on your motherboard wasn't designed to power an entire case of fans off of one header - you may have damaged the motherboard itself, trying to pull too much power through the CPU fan header. Like moose said, try one good fan on it to see if the header still functions in the first place...
 
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w0rmh0lez

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Sep 29, 2013
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Everything still works. I am just concerned that I affected to longetivity of the components. And I have a Gigabyte G1 Sniper 5. It have 8 Fan headers but only 1 is PWM controlled. If I try connected a fan to any of the other headers it just default to its full speed.
 
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ddpruitt

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Jun 4, 2012
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Longevity won't be affected, trust me. I've had more setups with fewer "proper" connections (think twist ties) and they worked as long as those plugged in normally. Internally the splitter is just a bunch of wires and a couple of diodes, and is really hard to break. As long as everything works your golden, besides fans are cheap if one stops working get a new one :)
 
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