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MickLL
Two Grand Man


Reged: 01/08/2004
Posts: 2282
Loc: SE England
PSU
      #655541 - 15/05/2008 18:05

Another dumb question.

A guy repairing a computer for me (he makes his living at it)reported that the PSU in the computer became noisy when connected to the new MoBo.

He's not trying to get more money - he says that he'll swap the PSU, foc, with one that he has lying around.

Here's the question. How on earth can a new MoBo cause a PSU to alter its sound?

MickLL


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Roger_Provins
Made-it Man


Reged: 22/10/2005
Posts: 2413
Loc: Gloucester, UK
Re: PSU [Re: MickLL]
      #655568 - 15/05/2008 19:23

Maybe it takes more power and your old set-up was right on the limit of the PSU output? If so the PSU would get hotter an the fan work harder - different sound?

--------------------
Rog


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MickLL
Two Grand Man


Reged: 01/08/2004
Posts: 2282
Loc: SE England
Re: PSU [Re: Roger_Provins]
      #655606 - 15/05/2008 20:59

That makes sense if PSU's are clever enough to alter their speed according to temperature. Are they?

MickLL


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Ken_Moffat
journeyman


Reged: 01/11/2006
Posts: 69
Loc: Motherwell
Re: PSU [Re: MickLL]
      #655612 - 15/05/2008 21:12

Possibly a build of dirt/dust in or on the the PSU coolinig fan?

My CPU fan sounded like an aircraft taking off. Stripped it down, cleaned it and it is now quiet as a mouse!

Wish I could say the same about the DVD ROM - next project.


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Overread
enthusiast


Reged: 17/01/2008
Posts: 320
Loc: UK; Suffolk
Re: PSU [Re: Ken_Moffat]
      #655692 - 15/05/2008 23:31

Some PSUs will (and not even when under pressure of use) emit a loud rapid flicking sound - its not the fan working overtime, but the alternator (or some other electical thingy that I have forgotten the name of) working overtime. It might not even happen when the PSU is being used intensivly and might be silent when it is - its one of those strange comptuer things.
Best thing is to give it a listen to and see if its too loud for you - I don't think it will ever damage your computer but it can be annoying if it starts happening all the time

--------------------
My photography blog
http://overread.wordpress.com


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Gordon_McGeachie
Joke Historian


Reged: 19/01/2007
Posts: 3686
Loc: East Yorkshire,
Re: PSU [Re: Overread]
      #655825 - 16/05/2008 11:46

I had to put a bigger psu (500w)in my pc when I installed a new graphics card as it needs its own supply.

But you cant beat a good cleanout now and again to help your pc run smoothly.

--------------------
Old Photographers never die,They just go out of focus / Jet Noise - The Sound Of Freedom

www.flickr.com/photos/gordon_mcgeachie/

www.flickr.com/people/26089093@N08/


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Wheelman



Reged: 23/11/2002
Posts: 794
Loc: Kent/Sussex border
Re: PSU [Re: Gordon_McGeachie]
      #655865 - 16/05/2008 14:01

If there is a problem with th PSU I would have no hesitation in changing it for a new, preferably upgraded item.

The three work machines I have had fail have all been PSUs and one of them took the Motherboard and Hard disk with it. Fortunately it was supplied by a local firm and although several years old they had a rummage around and found a compatible MB and along with a new HDD it was up and running again very quickly (and is still going strong)

--------------------
Colin
IRIPN

When you don't know where you are going then any road will do


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