Humming sound from my PC case

Pramit Kumar Biswas · Dec 17, 2015

Recently during some stress tests I get the humming sound from my PC. Specially when the fan spins fast. Bit when I tilt my case forward the sound disappears and comes back when I place it back to original position. The humming sound does not occur all the time during stress testing or benchmarking. Sometimes it remains silent during the whole tests. I have recently seen dusts in my stock cooler heatsink and fan. I don't rule out the possibility source of that light buzzing sound of resonance from HDD / PSU. Can anyone help me??? My temps are always normal. My fans are also tight on their places. Rescently I am hearing this sound.
Please help. Please explain why tilting the case stops the sound .

Terrorsquad1990 · Dec 17, 2015

Well you could always detach the PSU and HDD from its place, have the PC run and tilt both of them to see if the sound remains/disappears.

If it stays and you hear it's not from both of mentioned above, than it might be a case fan or a GPU fan..

Pramit Kumar Biswas · Dec 17, 2015

Terrorsquad1990 :

I don't have a GPU right now. But it might be the case fan or cpu fan. Because both of them r filled with dust. Does the PSU and HDD also work heavily during a stress test??? Because I don't hear the sound while surfing net and light gaming. My pc is just 5 months old.

photonboy · Dec 17, 2015

Just carefully STOP one fan at a time when the buzzing occurs. You can do it manually by pressing in the CENTER of the fan if careful, or better open the FAN SOFTWARE and stop the fan if possible when it's buzzing.

PSU and HDD?

The PSU would obviously work harder to supply power to the parts, thus the fan can spin harder, but the hard drive won't. It will just load the program into main system memory. Usually an HDD noise is pretty obvious, and you can touch the drive itself to dampen resonance if you suspect it.

CPU fan?
Possibly, though it's pretty hard to cause case resonance.

Having said that, stock fans can get pretty loud so you may wish to investigate a better cooler like:
a) $25 or so -> Cooler Master ... "EVO" (see pcpartpicker)
b) $63 of so -> Noctua NH-U12S

The Noctua is a lot more money but also SILENT most of the time if setup properly in fan control software (preferably from motherboard support site).

Summary:
*I'm pretty sure it's a CASE FAN, which again you can test by stopping when it's buzzing as suggested.

My dad's front fan would suddenly cause the case to be horribly loud. I ended up just removing it since it turned out it wasn't really needed. My dad has an i5-4670K, no graphics card, and the case temperatures never go above 40degC. I could have cooled the hard drive slightly but it's temps are fine so I just unplugged the fan since I'd have to go back and fix it if it started up again...

If so, you can google for information on reducing noise, but basically find a thin material you can place in between the fan and case to dampen noise. Sometimes a few pieces of folded, thin cardboard can help if jammed in or look for some rubber, plastic, gasket, whatever.

Pramit Kumar Biswas · Dec 17, 2015

photonboy :

Just carefully STOP one fan at a time when the buzzing occurs. You can do it manually by pressing in the CENTER of the fan if careful, or better open the FAN SOFTWARE and stop the fan if possible when it's buzzing.

PSU and HDD?

The PSU would obviously work harder to supply power to the parts, thus the fan can spin harder, but the hard drive won't. It will just load the program into main system memory. Usually an HDD noise is pretty obvious, and you can touch the drive itself to dampen resonance if you suspect it.

CPU fan?
Possibly, though it's pretty hard to cause case resonance.

Having said that, stock fans can get pretty loud so you may wish to investigate a better cooler like:
a) $25 or so -> Cooler Master ... "EVO" (see pcpartpicker)
b) $63 of so -> Noctua NH-U12S

The Noctua is a lot more money but also SILENT most of the time if setup properly in fan control software (preferably from motherboard support site).

Summary:
*I'm pretty sure it's a CASE FAN, which again you can test by stopping when it's buzzing as suggested.

My dad's front fan would suddenly cause the case to be horribly loud. I ended up just removing it since it turned out it wasn't really needed. My dad has an i5-4670K, no graphics card, and the case temperatures never go above 40degC. I could have cooled the hard drive slightly but it's temps are fine so I just unplugged the fan since I'd have to go back and fix it if it started up again...

If so, you can google for information on reducing noise, but basically find a thin material you can place in between the fan and case to dampen noise. Sometimes a few pieces of folded, thin cardboard can help if jammed in or look for some rubber, plastic, gasket, whatever.

Thank U very much. Is this buzzing a very serious issue??? My temps does not go beyond 53°C during stress test with the idle being at 30°C with the stock cooler . Is that a normal temp??

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