My new akasa fan controller... problems

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Got my new Akasa 6 fan controller today. Problem is the thing is pulsing like speeding the fans up then slowing them down for a millisecond every few seconds which obviously creates an annoying sound pattern. Do both the molex heads need to be connected?
 
Yes, to two seperate molex, but not two molex on the same cable.
If your psu can't supply enough power on a single molex, you can spilt the load between two on invidual feeds.
What psu you using?

I have the same controller & in the box is also a single molex to single molex as well.

Remember, the controller is rated at 30w, @ 2.5A per channel.
 
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My PSU is a coolermaster gx650. It seems like the controller uses pwm control as it is speeding the fans up quickly then slowing them down which is making a horrible pulsating woosh...
 
Should be fine only using 1 molex even with 6 fans on it, u only really need to use both if u are really loading the controller up with say 4 fans on each channel, do u mean the fans speed is fluctuating ? as they should stay at the speed u choose.
Edit: Also what starting and running current does it say on the box of the fans ? and how many have u got rigged up and in what channel config ?
 
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Each fan is on a separate channel so no overloading. Yeah the speed is fluctuating also the controller doesn't seem to change the speeds when turning the dial. Looks like I'll have to return it.
 
Yea could be faulty, all i could find was thoes fans are 0.53A which i think will be max starting current not normal running current as my 1850rpm GT's have 0.38A starting current and 0.083A running current, so 0.53 x 12 = 6.36W which is nothing on a 30W channel.
Edit: U could try attach another molex to the controller from a different rail on the psu and test just incase it is either overloading that rail or it is a faulty rail.
 
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Coolermaster gx650 only has a single 12 V Power Rail, rated @ 52A, & it only has three molex.

Thinking along the same lines as me Krony.

You got another psu you can try, or another pc you can try controller.
 
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I doubt the rail is faulty as my 6950 works fine overclocked. This is really ******* annoying me. Now I cant use my fans until I get a new controller as there too loud running full power.
 
If it's single rail then that is not the issue, i would still try a seperate molex lead tho before returning the controller just to rule out a defective lead or connector.
 
Nightglow said:
With a 6950 on that psu, there isn't much spare juice available.
Click to expand...

I doubt it's the psu's fault, 650w should be plenty for a single gpu setup, i think he mentioned that he had thoes fans running before with no issues apart from the noise and 6 of thoes starting up is only adding 38W.
 
The problem I think is the controller is using PWM to control the speeds and the fans aren't PWM. So it's fluctuating them, plus when I unplug it put the dials to low and plug it in all the fans go max speed, I think it's faulty.
 
Most controllers use PWM (Pulse-width modulation) which is basically switching the power on and off quickly, should work fine on any fan but the main problem with this as i have experinced is when trying to take an rpm reading, i had my 18W DDC pump running an a single channel on my FC2 and the RPM sensor fitted to the CPU header so that the PC would not startup if the pump was not running, i sued a monitoring program whilst the PC was running and as soon as u turn down the RPM below a certain % the reading goes mental.
 
Its just really annoyed me as it should work fine, but hey it's electronics if 100% of stuff went right there'd be a lot of people without jobs.
 
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