In Win 805 PC Case strange vibrations when fans are on

Luyuan20

Commendable
May 9, 2016
24
0
1,510
Hey guys,

So recently I built a new PC using the In Win 805 glass + aluminum PC case and while it looks great, there are some weird vibration noises coming from the case.

The build is as follows:

Case: In Win 805
Case fans: four Noctua NF-F12 120mm fans total; (1 on exhaust, 1 on CM 212 EVO, 2 intake)
[Low noise adapter (limits to 1200rpm) equipped on all fans in the system]
PSU: EVGA 750W-P2 Platinum Power Supply
CPU: i7-6700K (stock, no OC)
GPU: Intel HD 530 (Waiting on GTX 1080)
RAM: G.skill TridentZ 16GB (2x8GB) 2800Mhz
Motherboard: Asus VIII Maximus Hero
Storage: 256GB Samsung 830 SSD

I've actually been having issues with vibration/pulsating droning noise for this case for a few weeks now since I got it. Even after replacing every fan with supposedly quiet Noctua NF-F12s, the case still has this weird vibrating/ pulsating droning sound. I've checked to make sure everything is screwed on right, PSU is in ECO mode so the fan is off on that all the time since without a GPU the system never draws enough to start the fan anyway.

The CPU fan is run usually around 500rpm, rear exhaust about 450rpm, and the two intake fans are synced at 350rpm. CPU is 35C. These are idle measurements, and also when the droning noise is pretty obvious. CPU is NOT overclocked, leaving it at stock until I can figure out this annoying sound.

I went as far as to putting foam in the top of the case without any success. Something weird I found was if there was an object (eg my iPhone 5s) resting on top of the case the strange noise goes away. I thought the fans had hit the case's resonance frequency but playing with fan speeds didn't get me anywhere, its all solved by putting a phone/ipad/some sort of weight on top of the case.

To be clear, I have no idea where the vibration/pulsating droning noise is coming from. I'm hoping theres a solution to the issue rather than having to put something on top of the PC case at all times just to avoid the weird droning noise.

Any help would be appreciated. Thanks for your time.



 
Solution
IF adding a sizable weight at the top of the chassis causes the audible vibration to disappear then it's quite probable that the chassis's build has been compromised as it seems to have multiple panels with which they all form one chassis. Often times a chassis can and will see abuse during transit/shipping due to which a screw or two or perhaps a panel might have ended up being bent. Leading further into that hypothesis the panels/screws may be vibrating due to a the system's low rpm vibration translated via the panels.

If you've read physics and have read through resonance then you'll appreciate the fact that the noise being generated can be produced at lower rpm fan speeds or even at high rpm fan speeds. My advice is to live with it...

Lutfij

Titan
Moderator
IF adding a sizable weight at the top of the chassis causes the audible vibration to disappear then it's quite probable that the chassis's build has been compromised as it seems to have multiple panels with which they all form one chassis. Often times a chassis can and will see abuse during transit/shipping due to which a screw or two or perhaps a panel might have ended up being bent. Leading further into that hypothesis the panels/screws may be vibrating due to a the system's low rpm vibration translated via the panels.

If you've read physics and have read through resonance then you'll appreciate the fact that the noise being generated can be produced at lower rpm fan speeds or even at high rpm fan speeds. My advice is to live with it or start a support ticket with In Win and/or your seller and inform them of the issue. Perhaps an RMA would be in order though in hindsight it'd be better if you could strip the case/build and inspect the case for any signs of bumps or tampering. The glass panels may also be the source of the vibration/hum should they be touching a metal edge/part.
 
Solution

Luyuan20

Commendable
May 9, 2016
24
0
1,510


I think you're right. It turns out every time the fan changed speeds the minor vibration rattled the glass against the metal. I bought a new case now that is hopefully better, the Phanteks Enthoo Evolv ATX. Thank you for your time.