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Need a new Fan Controller which controls LED's aswell!

post #1 of 9
Thread Starter 
Hey All,

I have a BitFenix Hydra - http://www.overclockers.co.uk/showproduct.php?prodid=CA-071-BX&tool=3 and i am happy with it, however there is a slight issue im having. I have some Corsair SP120's hooked upto it and when you lower their rpm using the controller, they buzz, really loud. I take it this is the controller? i havent seen much info about SP120's that cant be down volted?

Anyway, the Hydra also controls the LED's in my Spectre fans, so i would like another Fan Controller which does this also if anyone knows of one?

Thank You smile.gif
post #2 of 9
If your LEDs are wired in series with your fan, and fan controller will control the LED's as well.

The problem is far more likely to be your fans than the controller.

If it is a PWM controller, then it could be the controller. By the nature of PWM, means motors don't run properly at extremely slow speeds (likely making them noisier).

If it is coil whine, then it is definitely the controller.

Perhaps you could post a youtube video or something identifing that noise. The noise of coil whine is very different than the noise cause by the motors straining from running too slow.

I am not sure exactly what the BitFenix Hydra allows you do do? It controls 5 fans, but it has 5 sliders...so how do you control the fans separately than the fans? Is it just an expensive on/off switch for the LED's?

Can we modify it, to make it "down voltage"? I am a electronics engineer, so yeah I can modify it. I am not going to take the time to figure out how to change the voltage regulator unless your serious about this.
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post #3 of 9
Thread Starter 
Here is a quick video showing the SP120's issue - http://www.youtube.com/watch?v=N4U5CDFR_0A

The same thing happens with my Akasa Vipers


The Hydra dims the LEDs when you lower the fan speed etc, it also has an on off switch for the LEDs

Please let me know your thoughts smile.gif
post #4 of 9
Thanks for the video, it's really helps. X-D

Well, that's definitely not coil whine. It is also definitely not noise from the motors going too slow. It doesn't seem like your controller is causing it.

*scratches head*

My best guess is it sounds like mechanical resonance causing constructive interference --> http://en.wikipedia.org/wiki/Constructive_interference . Basically two vibrations combine to form a much bigger vibration at a specific frequency. I have a quick way to test my crazy theory, remove a fan from the heatsink or case,...does that fan stop making noise when it is not attached to anything? If it is does, I'm correct and you should use rubber fan mounts and screws to attach your fans to dampen vibrations.

Let me know if my theory is correct. X-D
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post #5 of 9
Thread Starter 
Thanks for that dude, the same thing does indeed happen, its when i lower the voltage really low that it gets worse, would the vibration be less when it is really low like that?

I have ordered a new better quality fan controller to play about with over Easter anyway smile.gif So ill post my findings smile.gif
post #6 of 9
The vibration can be more at a lower speed if conditions were right, but I would have to go into a lot of math to explain it. There is no point, since my earlier guess was wrong.

Yes, please post your findings. I am very curious! At my job i repair motor controllers, and I am completely stumped and out of ideas.

thumb.gif
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post #7 of 9
Thread Starter 
I have put the new BitFenix Recon in and the problem has completely gone redface.gif, I can now turn the fans up a setup and it jumps about 150rpm each time, i don't get any buzzing on whining sound,

Maybe the Hydra was faulty?
post #8 of 9
That is super weird. Well, I learned something new. X-D
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post #9 of 9
Just saw this thread, I had a Hydra Pro too that I had the same issue with. Ended up sending it back for an Akasa.
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