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Silence seems impossible, help?

post #1 of 34
Thread Starter 
So I've installed new fans, namely apollish and a gentle typhoon all with a sound rating of 16db, then i installed the accelero xtreme plus on my 6870 and ran under the 7v wire to get noise down.
I had originally bought the thermaltake toughpower XT 775w since it got such good reviews, particularly for it's 'audio performance'.
Now ive switched all the fans down to minimum RPM, individual case fans make seemingly no noise.
However i can still definitely hear something and it aint all that quiet.
So i opened up the case and manually tried stopping all the fans, the only one left was the psu and it still seemed as noisy as before.
Surely my thermaltake touhgpower XT 775w isnt loud given the reviews?
Maybe I've just gone insane. The good news is it's an airflow type noise rather than a buzz or whine.
Any help?
    
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post #2 of 34
Thread Starter 
And time for the worlds most inaccurate audio test.
Decided the only way I could measure the sound produced by my pc is to set my surround sound to an inaudbile level of decibels then turn it up until i couldnt hear the pc, at -30DB on my AV receiver i couldnt hear the music i was playing, when I reached -4DB i couldnt hear the PC, does this mean my pc is producing 26DB of sound, i doubt it, but thats the best measure iv got. Is it feasible for me to make my PC quieter.
Just thinking when I go to uni it will be in the same room as i sleep, and i tend to leave it on.
    
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post #3 of 34
It's a decent way to test the sound level being produced by your computer, but not a great way.

ON the minimum, the ToughpowerXT's fan spins down to a rating of 25dB(A).

SO that's most likely your culprit.

You could build sound dampening foam, and then dampen that fans noise output. It's cheaper than buying anew PSU.

A new PSU is your other option.

Your PSU, electrically, is solid though.
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post #4 of 34
Foam makes sense if it's the vibration that's actually causing the noise.
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post #5 of 34
Quote:
Originally Posted by Plex View Post
Foam makes sense if it's the vibration that's actually causing the noise.
Foam also helps with sound directioning. Sound is a lot like air, it'll choose the path of least resistance to travel.

Also, it's a ball bearing fan. So the vibration is greater than that of a sleeve bearing fan.
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post #6 of 34
Thread Starter 
cheers for the responses, will seriously consider foam, just wondering though how possible it is to replace a psu fan with something quieter? or would that not be advisable?
Given my psu cost like £70 id prefer not to replace cause I don't think the resale value would be particularly great.
If I were to fit foam could I just pack it all the way around the psu without worrying about it potentially disturbing anything or heating it up?
Thanks
    
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post #7 of 34
You don't want to replace the fan, because it's more trouble than it's worth. It also requires some soldering skills.

The foam you would want to put on the inside of your case panels (or at least the ones facing you) that way sound is reflected into the other direction and thus sounds quieter.
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post #8 of 34
Thread Starter 
Only issue is in the phantom I have meshing that I use as like a window, so how much i insulate against that?
Thanks
    
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post #9 of 34
Quote:
Originally Posted by Point Blank Rob View Post
Only issue is in the phantom I have meshing that I use as like a window, so how much i insulate against that?
Thanks
If you don't have a fan mounted there you can put foam over it.

Or you could mod a solid piece of acrylic in as a window.

Mesh will always allow more sound through.
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post #10 of 34
Quote:
Originally Posted by Point Blank Rob View Post
So i opened up the case and manually tried stopping all the fans, the only one left was the psu and it still seemed as noisy as before.
To make sure, you can manually stop the PSU fan. While it is on, push a pencil eraser against the fan hub through the grill to gently stop the fan. If noise goes away, then that is the culprit. If not, then maybe something is making some strange electrical noise?
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