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 Post subject: Silenced Sonata - hopefully final
PostPosted: Thu Jul 29, 2004 8:04 am 
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Joined: Sat Jun 26, 2004 8:48 am
Posts: 17
Location: Vienna
I've changed my rig completely, again. This time, the PSU is ducted!

The original trick with the harddrive I did on the other thread, turned out to be terrible (here's what it used to look like). I hadn't noticed that the strings holding the harddrive were letting vibrations get to the case. The entire case was "humming"! Yikes. I figured out a better way using foam.

Temps: are looking good. M/B: 37°, HD: 33°. Bad part about the Zalman7000Alcu is that it's failry loud. I'm running it at ultra-low voltages, but that makes the cpu hot: between 55° at 5V and 65°/71° at 3V/2.5V (big difference in noise through subtle changes in fan speed). I've opted for 3V, 65° is safe enough for me & a sweet spot in noise/cooling. This is at 2GHZ/Athlon T-Bred 2400+, while folding, ambient room temp 22°.

Good news is that the PSU is getting fresh/cool air through the duct. The duct was fairly simple: Carefully measuring & cut out some cardboard. I made sure the cardboard is covering as much as it can, so that no hot air from the cpu can "go up" to the psu. The harder part was getting the cardboard in. Proud of this duct. :-) Here some pics:

Image
Image


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 Post subject:
PostPosted: Thu Jul 29, 2004 11:02 am 
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Joined: Sat Nov 23, 2002 6:33 am
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Location: Sunny SoCal
How do you get your fans to start up at 2.5 and 4V?

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 Post subject:
PostPosted: Thu Jul 29, 2004 4:40 pm 
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Joined: Tue Feb 17, 2004 8:53 pm
Posts: 81
Location: Illinois, USA
Where did you get that foam? :shock:

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 Post subject:
PostPosted: Fri Jul 30, 2004 12:45 am 
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Joined: Sat Apr 17, 2004 7:49 pm
Posts: 127
Location: Australia
prof99 wrote:
Where did you get that foam? :shock:


Looks like a car wash sponge :P


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 Post subject:
PostPosted: Fri Jul 30, 2004 4:58 pm 
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Joined: Sat Jun 26, 2004 8:48 am
Posts: 17
Location: Vienna
The foam was just laying around in the garage. Yes it's more like a sponge. :-)

I supply the case fan with 2 fan mates connected one after another, both at minimal settings. The first one produces 5V, the seond cuts that in half to 2.5.
The CPU fan is similar. Instead of a Fan Mate it's a knob that cabe with some other fans. Here I have two of these knobs attached to each other to produce the <5V. One of the knobs is sticking out of the front of the case on the pictures. Isn't that what you expected? Maybe you're refering to fans that won't run at these low voltages.


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 Post subject:
PostPosted: Sat Jul 31, 2004 2:09 pm 
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Joined: Sun Mar 07, 2004 10:33 am
Posts: 330
Location: Keene, New Hampshire, USA
what fans are you using that start at that low of a voltage?

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 Post subject:
PostPosted: Sun Aug 01, 2004 7:19 am 
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Joined: Sat Jun 26, 2004 8:48 am
Posts: 17
Location: Vienna
It's a stock Antec Sonata case fan (comes with case). Not sure if you can buy it seperately... The Zalman Alcu also has it's stock fan. Tip for getting fans to start: Try different combinations. I've found that certain setups don't work with certain fans (they don't start). Example three fan mates in a row didnt work for me, even with all set on high... Use different parts: like a 4pin-Power adapter that has 4 extra fan connectors, two 5V, two 12V (from Zalman). Also, try starting with a high voltage (that will get the fan to start) and slowly lower it.


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 Post subject:
PostPosted: Thu Jan 13, 2005 6:03 am 
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Joined: Wed Jan 05, 2005 11:34 pm
Posts: 158
I've started up my antec case fan as low as 3v no problem, at 5v it's still audible but at 3 it's just about right, I might put it a little lower to fully silence it.

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