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Convection cooling - yet another passive PC idea - Page 2

post #11 of 21
http://www.zalman.co.kr/ENG/product/Product_Read.asp?idx=116
there we go, just remembered that case today.
post #12 of 21
Quote:
http://www.zalman.co.kr/ENG/product/...ad.asp?idx=116
there we go, just remembered that case today.
I like how Zalman says this case can silently cool 75W of heat enough to keep the hottest card on the market cool

I think with a little mod this could be relatively easy, have a PCIe extenderand try to orient the graphics card in a way the passive heatsink can efficiently cool it. All you need is to make sure is that the graphics card is secured in place.
post #13 of 21
Quote:
Originally Posted by linkdiablo View Post
I like how Zalman says this case can silently cool 75W of heat enough to keep the hottest card on the market cool

I think with a little mod this could be relatively easy, have a PCIe extenderand try to orient the graphics card in a way the passive heatsink can efficiently cool it. All you need is to make sure is that the graphics card is secured in place.
You do know how old this computer case is right?
I remember seeing this case like 4 years ago. So 75watts from a graphics card was alot back then.
post #14 of 21
Thread Starter 
Quote:
Originally Posted by thrasherht View Post
I would recommend a set of Gental Typhoon fans for air movement, they are quiet and move a decent amount of air.
Good call - I'll take a look.

Quote:
Originally Posted by Skiivari View Post
Umm, totally passive ISNT possible with any type of hot components..
http://metku.net/index.html?path=mods/passive/index6
Have a look there, it's a massive case made out of aluminum fins with a massive convection tunnel, and it is still pretty hot..
Have a look at that article, if you know how to use google translate..
And those components are old.. 6800 gt and an opteron..
E: and those suggested coolers won't work, convection wont give enough airflow through fins that dense..
I was under the impression that today's CPUs ran cooler than older ones. As for graphics cards? I know for certain that my 4890 couldn't run with the Zalman VF1000 fan off - heated up even when underclocked as much as possible. But that's the point in changing the orientation, and getting a bigger cooler. Forced airflow if necessary - hence speedfan or equivalent.
As for the effect of fin density on convective air flow, I'll have to read into it more - it could be an important factor that I haven't considered.

Quote:
Originally Posted by nolonger View Post
The way I see it the best orientation for convection is to have your motherboard lying on the table. Provided you have enough surface area in the GPU cooler its orientation won't matter much. I see this in my GT210. It does heat up when used to run more intensive applications, but doesn't overheat simply because the chip can't give more heat than the heatsink can dissipate. It uses a very simplistic design probably made to be run on a regular ATX setup with a fan blowing from the side panel, but works fine even without a fan there.

The idea isn't very hard to execute and I've seen it done in one website actually. I just can't remember where I saw it.
That strikes me as the worst way to do it - the fin profile of the both cpu cooler (unless it's a flower) and gpu cooler will be completely wrong for convectional flow. But each to his own...

Quote:
Originally Posted by thrasherht View Post
http://www.zalman.co.kr/ENG/product/...ad.asp?idx=116
there we go, just remembered that case today.
That's way too difficult and custom for what I had in mind, but I sure would like to steal their PSU. See, I have a vague idea in mind but nowhere to put the PSU.

Quote:
Originally Posted by omega17 View Post
someone *almost* already thought of it

http://www.bit-tech.net/hardware/cas...raven-rv02-e/1
...
That's pretty much /thread right there. It's big though - I'm sure this could be done in a more compact way - and if the case is smaller (or at least narrower), there's a better chance of a proper convection flow. I suspect that case relies a lot on its fans, although at 180mm I doubt they're very loud.
Edited by zsolmanz - 1/8/11 at 10:34am
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Tony
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post #15 of 21
Quote:
Originally Posted by zsolmanz View Post
That strikes me as the worst way to do it - the fin profile of the both cpu cooler (unless it's a flower) and gpu cooler will be completely wrong for convectional flow. But each to his own...
http://www.thermalright.com/products...d=95&cat_id=27
http://www.thermalright.com/products...t_id=30&id=111

See how both of these have holes that go through the fins?
post #16 of 21
FYI, I don't think the Accelero S1 will work with a 4890. I couldn't get it to work with mine...mounting hole orientation problem.

I think the best way to get a silent computer is to get a plain case, mod with a 360mm Rexflo fan, and sit back and enjoy.
post #17 of 21
I don't see how it is convection cooling if there's a fan..
    
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post #18 of 21
Quote:
Originally Posted by Skiivari View Post
I don't see how it is convection cooling if there's a fan..
Convection =/= passive
post #19 of 21
Well, that's true but then again I dont see the difference between this build and every other one..
    
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post #20 of 21
you can sink your system in mineral oil... silent
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