Mailing List Archive: MythTV: Users

Near Ultrasonic Noise - PVR150

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diwelf at gmail

Aug 27, 2007, 4:02 PM

Post #1 of 4 (453 views)
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Near Ultrasonic Noise - PVR150

Hi Guys,

I have a weird recurring issue with my mythbox (combined
backend/frontend). The temperature in the box seems fine, but I get
this very high pitched noise coming from it every now and again. It's
highly irritating.

If I listen to the back of the case, the noise sounds to come from the
power supply, however if I remove the case, it sounds more like it's
coming from the PVR150 or Nvidia Card I have in there.

In order to stop the noise, what I have done is got a stand up floor
fan, and laid it down on the ground behind the server pointing
directly into the air vents. This seems to stop the noise.

Has anyone else experienced this with their cards? or know if there's
some kind of fan that will fit in a PCI slot that I can direct down on
the PVR? Obviously a fan laying behind the computer isn't the most
elegant solution and my girlfriend is getting annoyed looking at it :)

Any help would be appreciated.

Thanks,
Matt
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philledwards at gmail

Aug 27, 2007, 8:07 PM

Post #2 of 4 (408 views)
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Re: Near Ultrasonic Noise - PVR150 [In reply to]

> Has anyone else experienced this with their cards? or know if there's
> some kind of fan that will fit in a PCI slot that I can direct down on
> the PVR? Obviously a fan laying behind the computer isn't the most
> elegant solution and my girlfriend is getting annoyed looking at it :)

Google shows up lots here - have a look at
http://www.tigerdirect.com/applications/Category/category_slc.asp?CatId=804
However, you'll need to watch out for noise levels with these, so
alternatively you could do what I did - I bought a 120mm fan and cut a
hole in the top of my desktop PC case to install it above the PCI and
video cards.

Funnily enough, it occurred to me only this week that I may have
installed it the wrong way up! I'd be interested to hear people's
comments (sorry if this steals your thread a bit, but if you decide to
install a fan this way you'll need to know the answer to this anyway).
I have a Zalman power supply (which I presume expels air from the
case?) so I should have installed the fan on the top of the case to
pull air in, rather than suck air out, shouldn't I? That way the air
flow would be working properly. At the moment, I think I might have 2
fans fighting against each other to suck air out of opposite ends of
the case. Comments anyone?

Regards,
Phill
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rpooser at gmail

Aug 28, 2007, 6:11 PM

Post #3 of 4 (407 views)
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Re: Near Ultrasonic Noise - PVR150 [In reply to]

Matt Gibson wrote:
> Hi Guys,
>
> I have a weird recurring issue with my mythbox (combined
> backend/frontend). The temperature in the box seems fine, but I get
> this very high pitched noise coming from it every now and again. It's
> highly irritating.
>
> If I listen to the back of the case, the noise sounds to come from the
> power supply, however if I remove the case, it sounds more like it's
> coming from the PVR150 or Nvidia Card I have in there.
>
> In order to stop the noise, what I have done is got a stand up floor
> fan, and laid it down on the ground behind the server pointing
> directly into the air vents. This seems to stop the noise.
>
> Has anyone else experienced this with their cards? or know if there's
> some kind of fan that will fit in a PCI slot that I can direct down on
> the PVR? Obviously a fan laying behind the computer isn't the most
> elegant solution and my girlfriend is getting annoyed looking at it :)
>

Zalman fb123: http://www.endpcnoise.com/cgi-bin/e/std/sku=fb123
I took away the 92mm fan that came with it and replaced it with this
nearly inaudible fan (well, from 5 feet away it's not audible anyway):
http://www.newegg.com/Product/Product.aspx?Item=N82E16835119072

It's set up so that it blows over the graphics card, one pvr-150, the
wireless card, and partially over the other pvr-150. It really worked
wonders for bringing down the pvr 150 temps; they went form being hot to
cool to the touch.
Raphael
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diwelf at gmail

Aug 30, 2007, 7:44 PM

Post #4 of 4 (390 views)
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Re: Near Ultrasonic Noise - PVR150 [In reply to]

I ended up picking up two PCI Card Fans (I was searching for the wrong
term - video card fan). I'll see how those work, otherwise I will most
likely switch to your solution. Thanks.

Matt

On 28/08/2007, Raphael <rpooser [at] gmail> wrote:
> Matt Gibson wrote:
> > Hi Guys,
> >
> > I have a weird recurring issue with my mythbox (combined
> > backend/frontend). The temperature in the box seems fine, but I get
> > this very high pitched noise coming from it every now and again. It's
> > highly irritating.
> >
> > If I listen to the back of the case, the noise sounds to come from the
> > power supply, however if I remove the case, it sounds more like it's
> > coming from the PVR150 or Nvidia Card I have in there.
> >
> > In order to stop the noise, what I have done is got a stand up floor
> > fan, and laid it down on the ground behind the server pointing
> > directly into the air vents. This seems to stop the noise.
> >
> > Has anyone else experienced this with their cards? or know if there's
> > some kind of fan that will fit in a PCI slot that I can direct down on
> > the PVR? Obviously a fan laying behind the computer isn't the most
> > elegant solution and my girlfriend is getting annoyed looking at it :)
> >
>
> Zalman fb123: http://www.endpcnoise.com/cgi-bin/e/std/sku=fb123
> I took away the 92mm fan that came with it and replaced it with this
> nearly inaudible fan (well, from 5 feet away it's not audible anyway):
> http://www.newegg.com/Product/Product.aspx?Item=N82E16835119072
>
> It's set up so that it blows over the graphics card, one pvr-150, the
> wireless card, and partially over the other pvr-150. It really worked
> wonders for bringing down the pvr 150 temps; they went form being hot to
> cool to the touch.
> Raphael
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
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