High end case fans?

[Vince604]

thx phsstpok! I'm on the site now and going to test out the sound. This is exactly what I needed. I looked at the Evercool CUD-715 and read one of the reviews. I'd say it's a pretty good cpu cooler for AMD. Alright then thx! <P ID="edit"><FONT SIZE=-1><EM>Edited by Vince604 on 03/20/02 01:58 PM.</EM></FONT></P>

 

[Vince604]

Ok thx for the info. What is the point of having two fans in your powersupply? Is the bottom one an intake fan and the other an outake. I was looking at all the new enermax power supply's and they have the dual fans. But are they really worth while having the two fans?

 

[bum_jcrules]

Coversational speech from 3 feet away is considered to be 60dBA's. (Look at the bottom of the <A HREF="http://www.dataaire.com/heatexch/sound.html" target="_new">linked page</A>.)

So where are you coming up with your vacuum cleaner numbers??

Delta Electronic's fans can be loud but not always the case. The <A HREF="http://www.deltaww.com/products/dcfans/pdf/AFB8080254.pdf" target="_new">AFB0812H-F00</A> moves 35.31CFM while producing 31dBA. The <A HREF="http://www.deltaww.com/products/dcfans/pdf/WFB120120254.pdf" target="_new">WFB1212M-F00</A> is a 120mm fan that moves 72.39CFM and produces 34dBA. So like I said, "Delta Electronic's fans can be loud but not always the case."

<b>"Kenny! Give me the whoobie."

"You don't feed a baby chile!" - Mr. Mom</b> :lol:

 

[VulcanSoulPatch]

i have 3 80mm thermaltake case fans and its a little loud (about 32dba or at least thats what it says on the box)

If you have 3 fans with a noise level of 32dBA each, you get a higher sound level. Here's a basic table for adding decibels:

Diff between dBs: 0-1, 2-3, 4-8, 9+
Add to higher dB: 3dB, 2dB, 1dB, 0dB

32 - 32 = 0
Add 3dB to 32dB
35 - 32 = 3
Add 2dB to 35dB

So, for three 32dBA fans, your sound level would actually be 37dBA.

You can do this for all of the components in your case.

Either that, or get a SLM (Sound Level Meter) and just take a measurement.

I wonder, though . . . how do these companies arrive at the decibel ratings they give their fans?

Open air? or in case?
1 inch away? or 4 feet away?

These are variables in the equation.

Moral of the story?

Multiple low-level dBA fans may end up being louder than 1 mid-level dBA fan.

Second moral of the story?

Screw the fans . . . watercool!

VSP

<i>Whatever causes your water transportation vessel to maintain proper buoyancy.</i>

 

[bum_jcrules]

"I went to the hardware store and bought some used paint. It came in the shape of a house. I also bought some batteries but they weren't included, so I had to buy them again."

"I put instant coffee in the microwave and I almost went back in time."

"I went in for an interview the other day and right when the interview began I opened a book and started to read. The guy said, 'What the heck do you think you are doing?' I said to him, 'ANswer this question. If you were in a car traveling at the speed of light and you turned your headlights on, would they do anything?' 'He said, I don't know?' I said, 'I don't want to work for you then.'"



<b>"Kenny! Give me the whoobie."
"220-221...Whatever it takes."
"You don't feed a baby chili!" - Mr. Mom</b> :lol:

 

[bum_jcrules]

That fan is a dual fan design with a mass of 170 grams. You could do better with a really huge fan like a 120mm but I would not advise putting a 120mm on a 80mm base. Be my guest and try to do it. While we are in the rhelm of fantasy you could put on it the 120mm triple blade GFB1212HW-F00.(55.5dBA, 183.92CFM, and a mass of 570grams.) You could do it but probably in all reality rip the motherboard apart. So back to reality... You could change to the 92mm AFB0912VH-F00. (67.80CFM, 45.0dBA, and only 99 grams. That is 70 grams lighter than the FFB0812SHE-F00 and is 3dBA quieter.)

You would have to retrofit the fan onto the base but that is fairly simple with the Swiftech MCX 478 heatsink. See another post on a <A HREF="http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=646961#646961" target="_new">different thread</A>.

<b>"I put instant coffee in the microwave and almost went back in time" - Steven Wright</b> :lol:

 

[VulcanSoulPatch]

Back atcha . . .

"I'm living on a one-way, dead-end street.
I don't know how I got there."

<i>Whatever causes your water transportation vessel to maintain proper buoyancy.</i>

 

[VulcanSoulPatch]

I've always likes this guy, though . . . he's the one with the "Joke Grenades" . . . 'cuz it usually takes a few seconds . . .

"One time we were driving through a construction zone and the sign said, SPEED LIMIT 35 AHEAD. And there were four of us in the car. We were through there in no time."

VSP

<i>Whatever causes your water transportation vessel to maintain proper buoyancy.</i>

 

[Vince604]

That's a great idea bum_jcrules. I never knew bout that retrofit idea. Well I'm looking for the quiestest fan with with a high CFM. So 45dbA it considered pretty loud already. Looking for fans with a max of 30dbA. I was maybe thinking of maybe a Panaflo fan? But it's 120mm but has 68.9CFM with a noise level at 30dbA. So it's 1.1 CFM higher and 15dbA quieter. Would that due any good? thx again