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Shrouds and push vs pull - Page 2

post #11 of 39
http://www.performance-pcs.com/catal...ducts_id=25703

Or

http://www.performance-pcs.com/catal...ducts_id=29195

Or (at FPU - same products - more expensive)

http://www.frozencpu.com/products/11...tl=g47c121s262

http://www.frozencpu.com/products/90...tl=g47c121s262
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post #12 of 39
Thread Starter 
The problem is "slim profile" and "low profile" -- I want 25-ish mm of depth, the same as if I had a dedicated shroud. Those don't appear to be as deep as a 25mm fan, and 25 seems to be the magic number according to the shroud config article Martin wrote.
    
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post #13 of 39
While they aren't quite 25mm, they are pretty close and the performance difference between this and 25mm shrouds will probably be pretty small:

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post #14 of 39
Thread Starter 
Do you think an extra 25mm on top of that would help? Hurt? Feser Xtender or hollowed out 120mm for the fan/120 side, orhollowed out 140mm on the 140/rad side? Not sure of the physics of this -- would the "blank" space between the rad and shroud just create more turbulence?

Without any advice to the contrary, think I'll go with a shroud on the 120/fan side if I do put shrouds on.

Thanks! smile.gif
    
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post #15 of 39
hope will help,

    
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post #16 of 39
Thread Starter 
That would be Martin's article that's been linked to, but thanks. wink.gif It's been confirmed elsewhere that shrouds help with fan noise, and that's why I'm using one. It's nice to know that a single fan in push won't melt my proc though. biggrin.gif
    
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post #17 of 39
Personally I wouldn't use the extra shroud because having a shroud that is too thick also hurts performance. Based on this graph:



As you can see having a shroud that is 40mm thick (25mm shroud + 15mm adapter) offers almost the exact same amount of performance as simply having a 15mm shroud. That's why I'd just stick with the adapter, it's simpler and there won't be a performance difference anyways.
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post #18 of 39
Thread Starter 
Crap, I completely missed that chart. You're right, there's no performance hit either way. I don't mind, really, the main reason I'm going to use a shroud is for the noise reduction. Performance is nice, but it's the sound I have to have. Not elimination -- reduction. The computer lives where my wife and I sleep, so I don't want to die. smile.gif
Edited by Glacialis - 1/10/11 at 8:40am
    
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post #19 of 39
Quote:
Originally Posted by Glacialis View Post
Crap, I completely missed that chart. You're right, there's no performance hit either way. I don't mind, really, the main reason I'm going to use a shroud is for the noise reduction. Performance is nice, but it's the sound I have to have. Not elimination -- reduction. The computer lives where my wife and I sleep, so I don't want to die.
If you want silence the best way to accomplish it is:

-More Radiators
-GentleTyphoons (By far the best fan for noise/CFM)
-Fan Controllers

But mainly just more radiators.
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post #20 of 39
Thread Starter 
Silence, nah. Max 40dBA would be nice, but I'll take what I can get.

One of my design goals for this project was to have all water cooling components contained internally. With the case I have I may be able to add a small radiator up front, but I don't think I need to do that just yet.

A fan controller is going to be in the mix, but Gentle Typhoons are out. My rad is a BlackIce GTX 420 so I need the extra pressure vs CFMs.
    
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