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Sudden loud buzzing noise

T

Traxan

Senior member
I'm trying to get to the bottom of a loud buzzing noise that suddenly starts up on my PC. It has an annoying habit of coming on at 4 in the morning, too. It's loud and steady, doesn't appear to be coming from the onboard speaker. There are no software alerts and none of the temperatures or voltages seem out of order on Speedfan. I'm at a total loss to find the fix, other than shutting the PC down.

Theories? The gear in my sig is current. Mobo is Gigabyte Z87-D3HP
 
Could be the fan. Many people keep their fans but not sure today but in the past the logo sticker would be on the center of the fan and we would just lift that off and you could drop WD40 down into the fan with just 1 or 2 drops and the noise would go away.

Usually the noise might happen because you have antivirus installed and it performs automated scans and makes the cpu run hotter thus the fans spin faster.

I have not any need for the past 5 years to suffer any dying fans yet but when it does happen I got my WD40 on standby. Usually happens because dust or some other containment got in the way. But then again it could going through its end of life stage per the MTBF which most products have.

turn pc off and turn the fans by hand. The ones that moves the most freely will not need the WD40.
Lucky for you replacing the fan is the most cheapest of parts.

Could also mean your CPU paste is improperly applied and or not enough or fan is improperly seated.
 
Try to isolate to either electrical or mechanical. Couple tricks I use are:

1. Temporarily stop each fan one at a time (just for a few seconds typically using my finger) to determine if the noise ceases.

2. Use something like a wooden dowel with one end pressed against various parts of the system while listening closely at the other end (ie, conducts the sound). Try to locate the source of maximum sound level. Often that is enough to get you sufficiently close to the problem source for better diagnosis. (Hopefully the problem becomes obvious.)

A possibility too is something like capacitors in the PSU might be the cause, but it might, if your lucky, be something that only requires tightening a loose screw.
 
Well the problem goes away on shut down or reboot. So I'll chase down the loose fan theory first. Thanks guys.

Now to wait for another 4 am wakeup call.
 
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