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Fan management

post #1 of 10
Thread Starter 
Hello guys, I have a question.

I'm planning to build a water cooling setup, but regarding the fans used for the radiators, how do I "connect" all of the many fans together?
I've estimated that I need about 8 fans for a 360 rad and 140 rad in push pull.
Question is, do I plug all of the fans into my mobo using Y splitter? Can the mobo have enough power?

Do I use a fan controller to control all the fans? How about PWM fans, how do I control them, I haven't seen a controller that are able to support 8 PWM fans.

FYI: I'm using the Asus Maximus IV Extreme Z
post #2 of 10
You could use the board to connect all the case fans
for the other 8 fans of the radiators i would use a fan controller.

something like this:
http://www.newegg.com/Product/Produc...82E16811998089

*4pin PWn fans work on 3pin connection aswell
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post #3 of 10
Or a lot of fans come with a 3pin to Molex connector. The molex connector fan connector usually lets you chain a bunch together. Something similar to this http://www.newegg.com/Product/Produc...82E16812119149, Notice how the molex connector can be plugged into from both sides.

OR like stated already you can hook them up t a fan controller.
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post #4 of 10
Thread Starter 
Thanks, does this means if I hook up the PWM fans to the 3 pin fan controller, the PWM fan will function like a 3 pin fan, using voltage to regulate the fan speed?

Also, since the PWM fans are 4 pin, I guess I would need a 4 pin to 3 pin converter cable?

One side note, can I simply use Y cables and connect all my PWM fans to my mobo? This way I can skip the fan controller and control my radiator and case fans via software?
post #5 of 10
Quote:
if I hook up the PWM fans to the 3 pin fan controller, the PWM fan will function like a 3 pin fan, using voltage to regulate the fan speed?
Yes the PWM fan will just be controlled by voltage and act like a normal 3pin fan, you will still be able to read the RPM.

Quote:
Also, since the PWM fans are 4 pin, I guess I would need a 4 pin to 3 pin converter cable?
Unless the PCB is cramped(cap against it or something), you should be able to plug the 4 pin connector on to the 3pin header.

Quote:
One side note, can I simply use Y cables and connect all my PWM fans to my mobo? This way I can skip the fan controller and control my radiator and case fans via software?
If you want you can control almost as many PWM fans as you like from the mobo(off a pwm header) and then use a molex to power the fans. Useing a cable like this. http://www.gelidsolutions.com/produc...2&cid=11&id=63
Edited by andrewmchugh - 10/23/11 at 8:30am
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post #6 of 10
Do not connect that may fans to a single port on your board. The header is only rated to give so much power, and you risk frying something if you overload it.

Either hook it up to a fan controller (check the watts per channel first!!) or hook it up directly to your PSU.
post #7 of 10
Thread Starter 
Oh sweet, that cable seems like what I will need =)

Alternatively, since my a total of 8 4-pin ports(CPU_FAN, PWR_FAN, OPT_FAN1, OPT_FAN2, OPT_FAN3, CHA_FAN1, CHA_FAN2, CHA_FAN3) Can I like use a 4-pin Y splitter and connect 2 fans to each of the ports, that way I won't overload it? This will allow me to connect the 8 rad fans into 4 ports?
post #8 of 10
Quote:
Originally Posted by XenoJin View Post
Oh sweet, that cable seems like what I will need =)

Alternatively, since my a total of 8 4-pin ports(CPU_FAN, PWR_FAN, OPT_FAN1, OPT_FAN2, OPT_FAN3, CHA_FAN1, CHA_FAN2, CHA_FAN3) Can I like use a 4-pin Y splitter and connect 2 fans to each of the ports, that way I won't overload it? This will allow me to connect the 8 rad fans into 4 ports?
I wouldnt recomend it, either use PWM or a normal fan controller, you will get a much more precise control with a Fan controller, As least on my MOBO I only have one or two headers that allowed me to adjust the speeds.
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post #9 of 10
Personally, I wouldn't want to connect that many fans to the mobo... especially the one you have. I'm in the process of doing my first build, and I had the same question. I'm using 10 GT AP-15's as push/pull rad fans, and I want to connect it to a fan controller.

I researched (google) if I could couple fans together in and plug them into a fan controller. Found a few forums that said, it's possible to connect fans together by soldering the red and black wires in parallel, and leave 1 yellow wire connected to 1 fan. However, like the person said above, check the watts/channel. In my research 3 GT fans coupled together is still under 1 watt, so I made my own spitter for 3 fans, and tested if it would work. It tested fine, and I was able to control all 3 fans from one channel.




    
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post #10 of 10
Thread Starter 
Cool~ The mobo manual says The CPU_FAN connector supports the CPU fan of maximum 1A (12W) fan power. Not sure exactly what is 1A, but I suppose 12W is rather plenty for a few fans though.

Hmmm, maybe I should make my own splitters.
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