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air cooling noise, new after changed direction

Sirgeorge
By Sirgeorge
in Cooling
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I got this new noise that showed up in my PC right after I changed the direction of a fan. I don't think it is coil whine because of the "coincidence" and I switched out the screws for rubber ones that reduce vibration so it isn't that (I tried with both the metal screws and the rubber ones). What is the problem? I did this to get a slightly net possitive airflow from a slightly net negative airflow.

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could be anything im affraid without a video or audio snippet its hard to tell

Gaming PC: • AMD Ryzen 7 3900x • 16gb Corsair Vengeance RGB Pro 3200mhz • Founders Edition 2080ti • 2x Crucial 1tb nvme ssd • NZXT H1• Logitech G915TKL • Logitech G Pro • Asus ROG XG32VQ • SteelSeries Arctis Pro Wireless

Laptop: MacBook Pro M1 512gb

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you can use a screwdriver gently touched to areas that aren't sensitive to being damaged (plastic shrouds etc) to find the source of the noise if you can't find the exact source otherwise, you just stick your ear to the handle while it's touching stuff. What kind of fan is it? If it's a cheap fan the bearing/sleeve/wtf ever may have been damaged in the process of flipping it around. What kind of noise? High pitched like a screech (if from the fan, fan bearing likely damaged), low pitched or clicking, or a whooshing noise (likely turbulence from fans fighting or not getting adequate air/room) Does the noise change when fans are sped up, cpu stressed without changing case fans speed, gpu stressed without changing case fans speed?

desktop

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r5 3600,3450@0.9v (0.875v get) 4.2ghz@1.25v (1.212 get) | custom loop cpu&gpu 1260mm nexxos xt45 | MSI b450i gaming ac | crucial ballistix 2x8 3000c15->3733c15@1.39v(1.376v get) |Zotac 2060 amp | 256GB Samsung 950 pro nvme | 1TB Adata su800 | 4TB HGST drive | Silverstone SX500-LG

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The fans aren't damaged. They aren't cheap. The noise is coming from the fan with the switched flow (now flowing into the case). I'm going to try reversing the flow again and having another fan going inwards to take its place.

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If you have the fans pushing air into each other (eg front and rear both pushing air into the case) they may be creating a lot of turbulence.

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On 2/10/2017 at 11:55 PM, Sirgeorge said:

The fans aren't damaged. They aren't cheap. The noise is coming from the fan with the switched flow (now flowing into the case). I'm going to try reversing the flow again and having another fan going inwards to take its place.

What fans do you have and does stopping the fans with your hands stop the noise?

You need to quote a post or tag a member or else they won't get a notification you replied to them.

If you ever need help with a build, read the following before posting: http://linustechtips.com/main/topic/3061-build-plan-thread-recommendations-please-read-before-posting/
Also, make sure to quote a post or tag a member when replying or else they won't get a notification that you replied to them.

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