GA-Z77X-UD5H SYS_FAN2 Causing whining noise

[NozakiKoken]

Every 120mm fan I plug into the SYS_FAN2 header will start to make a loud high pitch whine. If i move to a different fan header the whine stops.

Anyone have this issue? Is this a hardware fault or something that can be fix with firmware update?

[autotech]

It could be that the fan 2 header on your motherboard is usb 3 i think that has something to do with it. Can you use a header that is only usb2?

[NozakiKoken]

I'm confused a 4pin fan header uses usb?

Anyways, I have other fans in other headers and they work. Whatever fan i swap to SYS_FAN2 header will start to generate a loud buzz/whining noise.

Guess there is no way to fix it?

[autotech]

Let me dig into it for a bit see if i can find something that will at least give it shot.



MY BAD  you are right is what i get for hurrying it is a 4 pin.  Strange that the fan whines though if it was mb i would say bad capacitor. Me myself id say that the header was getting overvoltage somehow or it is grounding by it causing the problem. Dont know that id do a RMA but i would contact tech assit about it.

http://www.gigabyte.us/support-downloads/support-downloads.aspx

Please expect 2 to 4 days for a reply sometimes it does happen but they will read it and reply.

[NozakiKoken]

Do you really think its a bad capacitor and will it affect other things down the road?

I just got this board new and don't want to jump the gun and RMA wasting time/shipping/hassle.I suppose I can live without SYS_FAN2 and just get y-splitter using other fanheads. Not sure if other users are experiencing this or just me.

[autotech]

I cant say for sure as the whine is in your fans and not on the board. But im a type of guy i dont take chances and fan in that header shouldnt make noise and there is a reason it is and since it is every fan and i assume you have tried 3 or 4 then it has to be the header. You can update bios see if it helps or shoot an email to tech assist depending on your local warrant. If i had it for a week id email first jump the gun if the email didnt solve it.

[NozakiKoken]

The noise is not coming from the motherboard. Its coming from the fan it self.

I tried two different 120mm fan
-Coolmaster 120mm
-Cougar Vortex 120mm

When plugged into SYS_FAN2 there will be a loud high pitch whine coming from the fan. Did some more testing and found the high pitch noise only happens when the speed is between 20-90%. So when it is at max RPM or lowest RPM the whine doesn't happen.

Now if i plug the same two fan into SYS_FAN1/3/4 or the CPU header the high pitch whine is not there at any RPM speed.

[autotech]

Email tech assist at the above link. They might of heard of that problem or just want you to RMA the board.

[MarkJohnson]

Did you check the fan speed?  Maybe it's set to max speed.  Does the fan sound faster in that port than the others?