SickleFlow Buzzing

[Kyle]

Hi, I've got a Cooler Master Cosmos 2 case and I just bought 2 blue Cooler Master SickleFlow fans and hooked them up to the fan controller built into my case. They work well at full power but are very, very loud; so when I turn then down via the controller, they make an even louder buzzing noise. This happens at minimum and middle power settings. So if I don't want the buzzing I have to turn them to full which they are naturally loud at. Should I return the fans?

 

[airdeano]

this is an inherent issue on the SF fans. under-volting them. as with other fans
like GT-15, some deltas, and even cougar PWM fans. a click, grind or whine.
i investigated some of the issues to be the armature (field windings) stacks. used
some RC electical motor capacitors on some to calm/cure the ills, but some just
made noise.

 

[Kyle]

So will I be able to return them or am I stuck?

EDIT: are there any other LED fans that don't get whine when changing speeds?

 

[airdeano]

try, what do you have to lose.. honestly, get a lower RPM fan with better specs.

 

[Kyle]

i'll try get an aftermarket cpu cooler and put them on that, then

 

[jamesriley94]

That's just fan controllers for you. Coolermaster fans are terrible with them.

I used to have Xigmatek fans on my old fan controller - they worked alright.

But you are honestly better just getting voltage resistors or something instead and undervolting them properly

 

[S_I_N]

Spectre pro LEDS behave well on a fan controller. I have 13 of them on mine.

 

[Pr3d4t0r]

i have 2x 140mm and 1x 230mm specter pro led, on my haf 922, i ussually run 230 on minimum via contoller and 140's on medium, no whine or noises made even on max the specters are very quiet