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post #14261 of 19729
Quote:
Originally Posted by BigFrank;12408296 
I would check out the R4 fans cooler master makes. They run about 65~70 CFM and are under 20 dBa. They come in black,red led, green, and blue led. They run 8-9$. I would check out SVC they have free shipping and if you order more then 3 they are 8$ with shipping included.
I would put a direct link up but I'm posting via my phone.

They aren't 20db at 70cfm, they are 20 db at around 38cfm. At their full 70cfm they are around 35to 40db. It's physically impossible to move 70cfm at only 20db.
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post #14262 of 19729
Quote:
Originally Posted by PapaSmurf View Post
They aren't 20db at 70cfm, they are 20 db at around 38cfm. At their full 70cfm they are around 35to 40db. It's physically impossible to move 70cfm at only 20db.
how bout these?

http://www.pccasegear.com/index.php?...oducts_id=8022

90cfm at 19db
    
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post #14263 of 19729
Quote:
Originally Posted by PapaSmurf View Post
They aren't 20db at 70cfm, they are 20 db at around 38cfm. At their full 70cfm they are around 35to 40db. It's physically impossible to move 70cfm at only 20db.
http://www.svc.com/r4-l2r-20ac-gp.html

specs say 69.69CFM @ 19dba. I'm not debating, I'm just saying that is what they are rated. When I turn my up 100% they aren't that loud.
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post #14264 of 19729
I suck at cable managment.
post #14265 of 19729
Quote:
Originally Posted by bennieboi6969 View Post
About 45 to 50db at 90cfm. The 19db is only at their lowest rpm and about 35cfm. As I stated in one of my previous posts fans tend to have a 2:1 ratio of cfm to db (re: 70cfm would be about 35db). It does vary a bit, but not nearly that much. Maybe 2.1 to 1 or so, but never 4.5 to 1 like those. It's physically impossible.
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post #14266 of 19729
Quote:
Originally Posted by BigFrank View Post
http://www.svc.com/r4-l2r-20ac-gp.html

specs say 69.69CFM @ 19dba. I'm not debating, I'm just saying that is what they are rated. When I turn my up 100% they aren't that loud.
I don't care what the specs say, they are misleading. It makes the fans sound better by listing the maximum cfm and the minimum db level instead of the actual db level at maximum rpm/cfm. Anyone who knows anything about fans will tell you the same thing. Only a fool takes fan specs literally.
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post #14267 of 19729
Well call me a fool then. Until someone runs some test using testing meters to measure sound and air flow what are we supposed to go by then? Just take a guess? Assume the worst?
I have some fans that are rated to run quieter than others but make more noise, same goes for some that say they push 80 CFM but push less air than ones rated at 40CFM.
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post #14268 of 19729
There are several threads here at OCN and other places that have done exactly that and have backed up what I have just stated. Start here and go from there. If one of the fans isn't there use some common sense. If everyone elses fans fit into the same pattern of an app. 2:1 ratio of cfm to db there is no reason why one company is able to make fans that are more than a couple of percentage points from that same ratio. If it was possible, all of the others would be doing it.
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post #14269 of 19729
Quote:
Originally Posted by BigFrank View Post
Well call me a fool then. Until someone runs some test using testing meters to measure sound and air flow what are we supposed to go by then? Just take a guess? Assume the worst?
I have some fans that are rated to run quieter than others but make more noise, same goes for some that say they push 80 CFM but push less air than ones rated at 40CFM.
PapaSmurf knows what he's talking about. You can go by what he says, and it will be more accurate than a manufacturers misleading blurb.

There is a thread on this site by Martin testing fans. Here.

http://www.overclock.net/water-cooli...-part-1-a.html

And this is his current 120mm fan testing:
http://www.overclock.net/water-cooli...ng-thread.html
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post #14270 of 19729
Quote:
Originally Posted by spiderm0nkey View Post
Yeah, you'd just have to chop it out and solder on a new one
or replace the whole fan altogether. They're not good fans by any stretch of the imagination
I regret getting more of the same crap. I have 3 140's and a 120 in my case
at i think either 1k or 1.2k rpm they don't really push that much air
I got the extra 3 for $20 so i guess i can't complain too much
Quote:
Originally Posted by torture View Post
Another update, I guess it's the last one (nothing left to upgrade):

New fans:


DVD stealth mod and Lamptron controller connected to CM690II light switch (kills only the screen):
http://www.youtube.com/watch?v=daxi77zlk9Y
That's a cool mod. do they go together or can you simply do the stealth dvd mod
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