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H105 little buzzing and one fan louder noise

post #1 of 7
Thread Starter 
So I have two problems with my H105. First one is little buzz sound of pump.

I have my H105 connected to PSU (radiator on top). My case is 780T Corsair with 1x140 mm back fan, 2x120mm bottom, 3x120mm front and 2x120 mm on radiator push top. All fans are typically running at low, quiet profile thanks to build-in fan controller of 780T case. All fans are SP Quiet Edition.

Case is sealed and is standing 30/40 cm next to me on desk and I can hear little buzz from pump. It is not loud, but I can hear it when I want over fans. It is just a little, I have to focus ear a little bit to hear it but I defienetly can hear it from case with fans on.

It sounds exactly like this (although this guy is closer and has open case but when I am that close it sound pretty much like that): https://www.youtube.com/watch?t=4&v=25515gnTmjM

My second problem is with second fan on radiator. I already replaced stock fans with SP120 fans. And the second fan is always making louder sound, like humming from time to time, then getting quite then humming again. I thought it was fan fault, as first one is dead silent, so I replaced it with new SP120 fan (same model). Was quiet for some time and then again humming sound returned to the same fan! I already checked and confirmed it is same fan as I plugged out and in its power and whole system was getting silent.

This is how I run my radiator and fans:




The noise fan is always this second one, close to water hoses. Can it be that somehow it takes vibration from tubes maybe and that is why this fan is always louder? I tried screwing it harder and looser but it didn't help at all (with first one and now second that replaced it)... I am either extremely unlocky and second fan broke in a row or there is something going on here I don't get.
Edited by Benny89 - 10/6/15 at 2:29am
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post #2 of 7
Hey there, I don't have a H105 but i do have a H75 which i believe uses the same pump, the pump does make a slight buzzing sound that is quite annoying, however i did reduce it the buzz quite a bit by tightening it down as much as possible as it might be resonating with the motherboard when its slightly loose.

For the annoying second fan problem, try switching the second fan's power connector with the first fan's and see if the problem then migrates to the first fan.
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post #3 of 7
Thread Starter 
Quote:
Originally Posted by Phenomanator53 View Post

Hey there, I don't have a H105 but i do have a H75 which i believe uses the same pump, the pump does make a slight buzzing sound that is quite annoying, however i did reduce it the buzz quite a bit by tightening it down as much as possible as it might be resonating with the motherboard when its slightly loose.

For the annoying second fan problem, try switching the second fan's power connector with the first fan's and see if the problem then migrates to the first fan.

Screws on pump are as tight as possible. It is not loud, it is just audiable enoug that I can hear it over my Quite Edition fans, running at 5V.

As for fan- I tried switching but it didn't help. It is defienetly from this fan. When switch this fan off- whole system is quiet, expect from little buzz from pump.
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post #4 of 7
Quote:
Originally Posted by Benny89 View Post

Screws on pump are as tight as possible. It is not loud, it is just audiable enoug that I can hear it over my Quite Edition fans, running at 5V.

As for fan- I tried switching but it didn't help. It is defienetly from this fan. When switch this fan off- whole system is quiet, expect from little buzz from pump.

Yeah the pump still makes a slight hum for me when i re-tighten it but it did reduce the noise. well for me it did.

As for the second fan, have you tried running the fan from a different power source? like the CPU fan connector? Is the fan in contact with something and maybe is transmitting some vibration? Or you could have the worst of luck and get 2 fans in a row with failed bearings
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by Phenomanator53 View Post

Yeah the pump still makes a slight hum for me when i re-tighten it but it did reduce the noise. well for me it did.

As for the second fan, have you tried running the fan from a different power source? like the CPU fan connector? Is the fan in contact with something and maybe is transmitting some vibration? Or you could have the worst of luck and get 2 fans in a row with failed bearings

I just wonder if all AIO pumps make that kid of slight buzz noise. Some people claim that yes and if you want silent system you need custom water loop and AIOs will always generate some sound since they work on max power all the time.

I checked cables and other things, nothing touch fan. I tried with different connections. I heard that when you keep fans upside down you have a quite a chance to broke them as they tend to break more often when working upside down.

Well, maybe someone here had simillar experience. If not I will have to buy another 2 SP120 fans and try them out.
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post #6 of 7
The upside down issue is only for sleeve/rifle bearing fans. Ball bearing and FDB fans shouldn't have that issue.

Maybe try some rubber dampers, you can get them from ebay for ~$1
Edited by Gilles3000 - 10/7/15 at 3:11pm
post #7 of 7
Well i have the H105 for 3 month and i see similar problem the fix very very easy you just need to untight the fans screws thumb.gif

also untight the radiator screws for dead silent cooler smile.gif
   
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