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Old 09-19-2007, 06:44 AM   #21 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

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Originally Posted by Andyf View Post
Urgh, I wouldn't go with that (nice drawing btw!).
Why the fans before and after the HD cages? Its a complete waste to have two fans working in series!
not when there's hard drives in the way.

Plus, it does look better.

*edit*
the PCI and PCI-E cards benefit from the fans on the inside, too.
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Old 09-19-2007, 07:08 AM   #22 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

Only fans I'm ever going to buy now are Yate Loons from jab-tech
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Old 09-19-2007, 08:05 AM   #23 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

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Only fans I'm ever going to buy now are Yate Loons from jab-tech
why?
there are better fans that produce less noise for the same or more CFM
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Old 09-19-2007, 10:39 AM   #24 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

Id get 2 120mm fans, ive got 4 of them in my Antec 900 and there quiet as a mouse but put your hand/head inside my case and you can feel a constant breeze through the whole case
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Old 09-19-2007, 06:14 PM   #25 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

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The c/s area of a 120mm fan is more than twice that of an 80mm fan. So to obtain the same massflow through an 80mm fan, you need to spin it much faster, hence its much louder (and higher pitched in noise) and much shorter lifespan.
Ah, I see.
Area of 80mm fan=3.14*(.4*.4) or ~.5 square mm
Area of 120mm fan=3.14*(.6*.6) or ~ 1.1 square mm

So a 120mm fan has slightly more than twice the area or an 80mm fan. So, two 80mm fans will have almost the same area as one 120mm fan.

Now that I search for fans, I see that most 80mm fans move 29-34 CFM and 120mm fans between 60-79 CFM. Would two 80mm fans use more electricity than one 120mm fan?

I guess I need to buy some good 120mm fans.
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Old 09-19-2007, 06:22 PM   #26 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

hmm i think of it more as "Nag" "Asthma"
haha j/k, and your welcome for coming up with your new title
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Old 09-19-2007, 11:40 PM   #27 (permalink)
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Default Re: Which is better? 2 120mm fans or 4 80mm fans

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Nah. The slickest thing is the monster that you never see (hear) coming.
nah the slickest thing ever is the monstah you know is coming...you can hear, and its scary.
nag. as$. mah.
nice nvisible.
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