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PWM Fan controller needed!

post #1 of 16
Thread Starter 
Hey guys, I got four replacement fans for my h100 fans, yet my mobo has two pwm connectors. Two of the fans are placed in the normal pwm fan mounts, which have an increased minimum RPM rate than the CPU (lovely Asus motherboards), so basically I need a pwm fan controller (preferably one that's small profile so I can stick it somewhere in my case, which needs to be able to output 1.8 amps at MAXIMUM, and which has a permanent manual knob/low setting as I want the fans to be on low ALL THE TIME.

I have the Haf X case and I have excalibur fans on my radiator, it's very noisy atm, but I don't want a silent build because firstly I like the slight noise (in a hot country and am used to the AC so it's nice to have a quiet whirring in winter), and secondly it doesn't bother me during idle/browsing, and in game time I have lots of noise from explosions so slight increases don't really matter.

I can REALLY only use Amazon.com as they ship internationally, and I'm not using my credit card so it's a hassle to retype all the information...

Thanks everyone!

If it's impossible to find one, I could throw out my front fan and mount a dual/single bay PWM fan controller but eeh. Secondly I've seen one or two pwm pcie fan controllers but they'll have the wires running in-front of my case window, and they will hamper air-flow.

IF ANYONE HAS FIRST HAND EXPERIENCE WITH THE FANS/SHOWS ME SOME LINKS, I will consider buying voltage reduction cables from Amazon.com for the fans smile.gif. I bought PWM splitter cables but they don't work very well, I.E. it keeps the fans on a MODESTLY high setting, and yes I ripped out the rpm read cable on one of the inputs but still...
    
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post #2 of 16
Sunbeam Rheosmart has 6 channels 30w each. I just don't like the green and red LED's, but I tried some lamptron and prefer this controller.
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post #3 of 16
Quote:
increased minimum RPM rate than the CPU (lovely Asus motherboards),
I was looking at some external PWM fan controllers for this exact reason, as Im out of PWM fan controllers.
I looked at this one: http://www.nesteq.net/gb/products/fancontrollers/maxzero/ but the reviews don't look too positive.

Im looking for others.
post #4 of 16
Thread Starter 
Quote:
Originally Posted by Rognin View Post

Sunbeam Rheosmart has 6 channels 30w each. I just don't like the green and red LED's, but I tried some lamptron and prefer this controller.

"The Rheosmart 6 Fan Controller is designed to make any existing 3-pin fan automatically regularized by the PWM signal from the Motherboard!"


:\ it only accepts 3 pin connectors.
    
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post #5 of 16
You don't need a PWM fan controller. What you need is a PWM spliter cable so that you can connect the two fans to the same header on the motherboard.

Something like this: PWM splitter cable


Or you could make your own.
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post #6 of 16
Quote:
Originally Posted by xXSebaSXx View Post

Or you could make your own.

On a scale of 1 to 10, how hard would it be to create a PWM Y cable without any spare pins?

Ill try making a PWM pin out of paper today.
post #7 of 16
Quote:
Originally Posted by JassimH View Post

"The Rheosmart 6 Fan Controller is designed to make any existing 3-pin fan automatically regularized by the PWM signal from the Motherboard!"
:\ it only accepts 3 pin connectors.

I wonder about the differences because I'm driving 3x12cm + 1x20cm fans with Rheobus (older one with 3 pins) and no problems.
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post #8 of 16
Quote:
Originally Posted by Martiny View Post

On a scale of 1 to 10, how hard would it be to create a PWM Y cable without any spare pins?
Ill try making a PWM pin out of paper today.

I'd say about a 3 or 4 depending on the person. You don't need any special equipment; though a soldering iron and some solder will make things super easy.

- Take the PWM wire from Fan1 out of the connector.
- Remove the pin that clicks it to the connector on the end.
- Strip a bit of the wire and tin it with solder.
- Take the PWM wire from Fan2 out of the connector.
- Strip a section of wire close to the pin at the end of the wire.
- Solder the wire from Fan1 to the stripped wire section on Fan2.
- Insulate everything with heatshrink.

You can now plug Fan2 to the CPU_FAN header; it will send signal to Fan1 and Fan2 to control their speed. You connect Fan1 to a different PWM header on the motherboard.

CPU_FAN header will give power to Fan2 and will send PWM signal to both fans.
The second fan (Fan1) will get power and report RPM through the separate fan header on the motherboard, but its speed will be controlled by CPU_FAN header based on CPU temperatures.

biggrin.gif
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post #9 of 16
Quote:
Originally Posted by xXSebaSXx View Post

I'd say about a 3 or 4 depending on the person. You don't need any special equipment; though a soldering iron and some solder will make things super easy.
- Take the PWM wire from Fan1 out of the connector.
- Remove the pin that clicks it to the connector on the end.
- Strip a bit of the wire and tin it with solder.
- Take the PWM wire from Fan2 out of the connector.
- Strip a section of wire close to the pin at the end of the wire.
- Solder the wire from Fan1 to the stripped wire section on Fan2.
- Insulate everything with heatshrink.
You can now plug Fan2 to the CPU_FAN header; it will send signal to Fan1 and Fan2 to control their speed. You connect Fan1 to a different PWM header on the motherboard.
CPU_FAN header will give power to Fan2 and will send PWM signal to both fans.
The second fan (Fan1) will get power and report RPM through the separate fan header on the motherboard, but its speed will be controlled by CPU_FAN header based on CPU temperatures.
biggrin.gif

As long as that other header is outputting constant 12 V, PWR_Fan headers for example seem to be such headers.
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post #10 of 16
Quote:
Originally Posted by mm67 View Post

As long as that other header is outputting constant 12 V, PWR_Fan headers for example seem to be such headers.

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
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