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Goobertron

I can hear my rad fans at 400rpm :(

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Posted · Original PosterOP
When i was still air cooling i had three Corsair ML120s as case fans and couldn't hear a think at 600rpm so when i decided to build a custom loop i bought three more.  Even at 400rpm i can now hear them and i can only assume it's because of the air travelling through the radiators.
 
Is this normal or have i simply bought the wrong fans and/or radiators?  I'm starting to regret moving to custom water, i feel like i've made one mistake after another. :(
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There are quieter fans from noctua, bequiet, noiseblocker.


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You could play with the configuration (push or pull). I doubt buying quieter fans would make much of a difference, the variable here is likely 100% the radiator.


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2 minutes ago, chckovsky said:

You could play with the configuration (push or pull). I doubt buying quieter fans would make much of a difference, the variable here is likely 100% the radiator.

ML fans are not that quiet.

Good quiet fans will still be quiet even on a radiator.

Also adding more fans always adds morenoise, so obviously going from 3 to 6 adds more noise, which you can counteract by using quieter fans.


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Posted · Original PosterOP

Having spent a small fortune on these ML120s i think i'm stuck :(  I can no longer return them and i'd lose tons of money selling them.

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1 hour ago, Enderman said:

ML fans are not that quiet.

Good quiet fans will still be quiet even on a radiator.

Also adding more fans always adds morenoise, so obviously going from 3 to 6 adds more noise, which you can counteract by using quieter fans.

This...the dBA doubled...(weighted sound perceived by the human ear)

 

example - 1x Fan = 15dBA x3 fans = 45 dBA in the air.

Turn down 33% = 10dBA per fan x6 = 60 dBA in the air to listen to

 

This is just a quick math, quick bleh understanding of why its louder.

 

And yes, adding a radiator blocking the airflow will cause sound to spill out and be more amplified potentially.  The air is being "buffeted" against the radiator.


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45db would be 1000 times louder than 15 db. Also, I have 22 SW3's running at 400 rpm in my build and you literally have to put your ear up to the case to tell it's turned on. more fans add more noise, but it's not 1:1 additive like you're suggesting.

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9 minutes ago, Ttnuagmada said:

45db would be 1000 times louder than 15 db. Also, I have 22 SW3's running at 400 rpm in my build and you literally have to put your ear up to the case to tell it's turned on. more fans add more noise, but it's not 1:1 additive like you're suggesting.

For the plebs that don't want to google that's the quickest way to get them to understand.

 

You aren't a pleb eh?  Explain to him then why adding more fans against a restricting surface is causing more noise - rather than respond to my farmboy description.

 

OMGRee I have like 17 fans in my case last I looked from varying companies running on varying RPMs in various sizes from 40mm - 200mm.  Cant hear it either.  Guess we both know what we are talking about (since that's the factor that gives you "an understanding" I guess)


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I’d get better fans. Wouldn’t go out of my way to get Corsair fans, the lights make people go to them even more. 


Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 16GB, EVGA 1080 SC, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

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Posted · Original PosterOP
Just now, Mick Naughty said:

I’d get better fans. Wouldn’t go out of my way to get Corsair fans, the lights make people go to them even more. 

Which fans do you consider to be better? Specifically for radiators of course.

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Just now, Goobertron said:

Which fans do you consider to be better? Specifically for radiators of course.

Only fans Ive ran after making a loop would be noctua. Could give ek a try. The top brands are a normal go to, performance wise.


Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 16GB, EVGA 1080 SC, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

Spare RIg Corsair Air 540, I7 4770K, Asus Maximus VI Extreme, G.Skill Ares 32Gb, EVGA 1080 SC, Corsair CX850M, Acer xG270HU 2560x1440@144hz

 

 

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Posted · Original PosterOP
1 minute ago, Mick Naughty said:

Only fans Ive ran after making a loop would be noctua. Could give ek a try. The top brands are a normal go to, performance wise.

For Noctua would you be talking about NF-F12s?

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1 minute ago, Goobertron said:

For Noctua would you be talking about NF-F12s?

Id take anything over what you have. But yes, Id take those now that they offer them in black. I cant hear my 2k fans 600. Slight hum at 700 but that's mainly the 140mm versions. 


Main RIg Corsair Air 540, I7 8700k, ASUS ROG Strix Z370-H, G.Skill TridentZ 16GB, EVGA 1080 SC, EVGA 850 GQ, Acer KG251Q 1920x1080@240hz 

 

Spare RIg Corsair Air 540, I7 4770K, Asus Maximus VI Extreme, G.Skill Ares 32Gb, EVGA 1080 SC, Corsair CX850M, Acer xG270HU 2560x1440@144hz

 

 

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