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Discussion Starter #1
The Fan Database


After the success of shinji2k's PSU review database here; I thought it would be great to get a similar thing going for another crucial aspect of your system, fans.

There are often many misconceptions floating around OCN and the internet regarding fans, what their true CFM to dba ratio is, static pressure, bearing type, motor size etc, and this often leads people to blindly recommend fans just based upon the noise level or CFM rating. While this can be true and is pretty much spot on for case and open air fans, when you add the slightest obstruction to the fan, these levels can fluctuate and performance can drop (Such as adding to a heatsink or radiator with a dense fin array).

Below is a Google spreadsheet document which I have linked, please fill out the columns and rows with any fans you have (Please keep it Chronological/Alphabetical) and your experiences with them (These will vary, but I am certain most will follow a similar trend); I want people to be able to distinguish the good, the bad and the damn right aweful!

Legend:

CFM: Cubic feet per minute, the amount of air pushed, per minute, in cubic feet, from a stationery position. This is used to measure the amount of air pushed or pulled, ideal for case fans, and a contributing factor for heatsink/rad fans.

dBA: A difficult one to explain, but in layman's terms, this is the noise level of the fan, relative to your hearing. A fan does not have to be 0dBA to be "Silent", as this does not necessarily scale like that, and it all depends on your level of hearing.

RPM: or Revolutions Per Minute, this is the speed of the fan, many are PWM (see below) adjustable, so this figure can vary, in that instance, please put the lowest and highest figure.

PWM: Pulse Width Modulation, a method of monitoring and modulating amounts of electrical power between fully on and off. This is great for fans, as it allows the speed of the fan to dynamically adjust according to heat and/or the load level of critical components.

Pa: or Static Pressure, in laymans terms, is the amount of pressure exerted upon an area, so if this was on a heatsink or radiator, that would be it. Important for the above uses.

Size: Fan size in mm, measured corner to corner, common sizes included 80, 92, 120, 140 and 200mm, but feel free to add others!

Width: Fan width, common widths are 15,25 and 38mm, but again, custom sizes are welcome


Bearing Type: Common types include Sleeve, Ball, Rifle, Fluid and Magnetic, but again, if your's is unique, feel free to add it.

Typical Usage: Does this fan exceed as a case fan? or does the high level of static pressure make it ideal for mounting on your Radiator? Feel free to give your opinion on this, after all, this is only going to help others!

For adding entries, make/brand name does not need to be alphabetical, but keep model/part no alphabetical, keeps it nice and tidy then


http://spreadsheets.google.com/pub?key=0ArBH0nGz95pMdFFaRmVwRGt3QnI1YnNzb0k3c2hJcHc&w=100&h=500 Google Spreadsheet
 
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Discussion Starter #2
Thread ready to go
 

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I'm gonna make first contribution to as-tested TRUE specs of R4s and high-speed Slipstreams; respectively, rated for each are typically 90CFM (or more recently, 69CFM which IS accurate) and 19dBA (NOT accurate) and 110CFM/34dBA (not accurate). True ratings respectively: 69CFM/~33dBA (approx.; IRL it sounds louder than that) and ~82CFM/~36dBA. I can't comment on real static pressure as nobody has tested that for either fan using proper instruments but I know damn well both are overrated on static pressure. They're both decent case fans if you can bear the noise, but not good for restrictive surfaces. The fans I actually have, I've ensured they're rated accurately, so just looking at my system specs at the fans I have and looking at their specs you can get an idea of those.
 

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Discussion Starter #4
Quote:

Originally Posted by Chunky_Chimp View Post
I'm gonna make first contribution to as-tested TRUE specs of R4s and high-speed Slipstreams; respectively, rated for each are typically 90CFM (or more recently, 69CFM which IS accurate) and 19dBA (NOT accurate) and 110CFM/34dBA (not accurate). True ratings respectively: 69CFM/~33dBA (approx.; IRL it sounds louder than that) and ~82CFM/~36dBA. I can't comment on real static pressure as nobody has tested that for either fan using proper instruments but I know damn well both are overrated on static pressure.
Fantastic, just the sort of contribution I am looking for!


Any chance you could help with the spreadsheet I linked in the second post? really stuck
 

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Discussion Starter #6
Quote:

Originally Posted by Chunky_Chimp View Post
I haven't worked with Google Spreadsheet thus far, sorry. There is a tutorial somewhere on here about that, though, I'll see if I can find it again. Edit; got it. http://www.overclock.net/overclock-n...your-post.html
Yeah just followed that but have had no luck whatsoever, it just wont do it for me
Gonna have a fiddle with it.

In the meantime, people, can you post your results? I will add them later
 

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Oh, all right, then. I'm sure it's something simple that only requires a few key presses, crap like that usually is.
 

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Right guys, with the help of el gappo, database sorted, get in and get posting
 

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Quote:


Originally Posted by Swiftes
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Right guys, with the help of el gappo, database sorted, get in and get posting


Added a few.
 

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Originally Posted by gymenii
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Added a few.

Fantastic, making some contributions myself! Rep + for your hard work
 

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How do I actually add data to the spreadsheet? Or do I just post here?

I can add my Zalman ZM-F3's and Enermax Magma fans.
 

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Originally Posted by alex98uk
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How do I actually add data to the spreadsheet? Or do I just post here?

I can add my Zalman ZM-F3's and Enermax Magma fans.

Scroll down to the bottom, hit edit this page and voila


That would be awesome, I was about to add F3's but haven't got around to it, ill add the Sunon Denki's and some San Aces
 

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Swiftes, Can you add another column for video link? We can then add martinm210 air flow/noise videos or other(s) home testing to the database.

example --
film_go.png
YouTube- GentleTyphoonAP15
 

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Discussion Starter #14
Quote:

Originally Posted by gymenii View Post
Swiftes, Can you add another column for video link? We can then add martinm210 air flow/noise videos or other(s) home testing to the database.

example -- YouTube- GentleTyphoonAP15
Added now mate!
 

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Does this sound realistic? 140mm, 140CFM and 33 dBA?
 

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Quote:

Originally Posted by alex98uk View Post
Does this sound realistic? 140mm, 140CFM and 33 dBA?
Hmm, which fan?
 

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Quote:


Originally Posted by Swiftes
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Hmm, which fan?

It was a 140mm Sharkoon fan. I added it to the database anyway.
 

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Quote:


Originally Posted by alex98uk
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Does this sound realistic? 140mm, 140CFM and 33 dBA?

In my experience most fans @ 100CFM produce roughly 40dBA, so NO that does not sound right. Kinda like the same marketing data as the R4's... 2000 RPM @19dBA
 

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Quote:

Originally Posted by gymenii View Post
In my experience most fans @ 100CFM produce roughly 40dBA, so NO that does not sound right. Kinda like the same marketing data as the R4's... 2000 RPM @19dBA

I am gonna dig up some info on that, I am leaning both ways, not sure tbqh. I have some fans coming next week, so tests will be up and more data!
 

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Quote:


Originally Posted by gymenii
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In my experience most fans @ 100CFM produce roughly 40dBA, so NO that does not sound right. Kinda like the same marketing data as the R4's... 2000 RPM @19dBA


Are you sure? He's talking about a 140mm fan.

EDIT: Or maybe you're right... This kaze maru doesn't have anywhere near 130CFM
http://jab-tech.com/Scythe-Kaze-Maru...m-pr-4627.html

EDIT2: The airflow for the sharkoon is in m3/h, not CFM... It works out to be about 83 CFM, so it is reasonable.
http://www.xtremesystems.org/forums/...5&postcount=12
 
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