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PWM Fan controller needed! - Page 2

post #11 of 16
Quote:
Originally Posted by xXSebaSXx View Post

If the header is a PWM header (4-Pin) chances are that there will be an option for Smart Fan control for it in BIOS... Just disable that option and the header will push 12V all the time. biggrin.gif

Mostly it's just Gigabyte boards that have such an option, things are a bit different with other boards.
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post #12 of 16
Thread Starter 
I'm using a PWM splitter cable, but either I'm retarded, or it's failing. I clipped the "sense" line on both pairs, and plugged it into my motherboards optional cpu and cpu fan ports, my mobo reports 700rpm or so, but I'm hearing a noise louder than Corsair h100 stock fans at 2200 rpm which I doubt is right...

EDIT:

I clipped ONE sense line on ONE/TWO of each pair of PWM splitters so my motherboard doesn't get "confused".
Edited by JassimH - 2/4/12 at 11:58am
    
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post #13 of 16
Thread Starter 
Alright....I've given up.

The yate loon high speed fans seem to be exactly like the corsair fans (just rebadged) so I'll be picking up 4 of them and installing them into the h100 block and put that on low settings. Thanks biggrin.gif.
    
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post #14 of 16
well, before you go out and do that, have a look at these two schematics. If you're not afraid of getting your hands dirty with electronics, that is...

one's using a 556 timer for PWM duties... http://www.overclockers.com/wp-content/uploads/2010/12/PWM-circuit556.png

and one using a LM317 for analog voltage control. Just make sure you replace R2 with a 2200ohm potentiometer. http://4.bp.blogspot.com/-7EY0uW0OE2g/TcDxgE7hzAI/AAAAAAAAAKo/NHRMUA7h_vc/s1600/lm317.gif
    
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post #15 of 16

JassimH -

 

Don't give up. You can follow xXSebaSXx's advice on getting a PWM splitter (read this). You can control the fans from your motherboard, but power them with your PSU via Molex.

 

Or you can get a PWM splitter and connect it to a PWM Mate, which is a PWM controller. My review of the PWM Mate is here.

 

As an example, here are five PWM fans connected through an FP5 (5-way PWM splitter) to a PWM Mate:

 

PWM fans with PWM Mate and FP5

 

They all get their power from the PSU through the Molex connectors, but they are all controlled by the PWM Mate. You will note that there is no motherboard in sight.

 

So: there are two different ways to make this work. Just remember that the whole point of PWM control is to control the speed of multiple fans without having to overdraw a fan header.

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post #16 of 16
^^^^ What he said.

Whenever I try do do/make something and fail; I always think about what Mr. Edison said when interviewed about the light bulb. Edison commented that it had taken him about 1000 tries before he could get the thing to work properly and when asked if having failed so many times didn't discourage him; he simply replied: "No; I did not see them as failures. I saw them as having found 999 ways of how NOT to make a lightbulb".
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