[vdr] Re: How to get the VDR box silent

[Henning Holtschneider <hh@holtschneider.com>]

--On Montag, 20. Januar 2003 09:48 +0100 Ondrej Wisniewski 
<ondrej.wisniewski@eri.ericsson.se> wrote:

> I think that the only really noisy parts of the box will be the cooling
> fans of the power supply unit and the main processor. Now I read in a
All moving parts will generate noise. You have to silence the fans and the 
hard drive.

> Does anyone know of a less expensive CPU that will run without active
> cooling ? How did you deal with the noise problem ?
I took an old Slot 1 Pentium II CPU originally clocked at 433 MHz and 
slowed it down to 300 MHz (the mainboard didn't allow a slower speed ;-). 
It's equipped with a passive heatsink that covers both front and back of 
the processor. I can't play DivX movies through the DVB card with this 
configuration but everything else works just fine.

I also replaced the power supply fan with a slower and more quiet fan 
(which made the biggest audible  difference). If you are willing to spend 
at least 250 EUR on the power supply, you can also buy a fan-less unit.

Last but not least I did not screw on the hard drive but instead placed it 
on a cork pad instead.

> I wonder why commercial sat receivers (like the DreamBox running on Linux
> http://www.dream-multimedia-tv.de/cat_eng/produkte/dreambox.php4) don't
> have the cooling problem ? They have a Main processor and power supply as
> well.
They are

a) not using PC processors (Intel/AMD) which have a high thermal power loss 
and draw a lot of power and
b) they are using more energy-efficient power supplies (PC power supplies 
are dead cheap, not efficient)

Regards,
hh


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