Controlling multiple 4pin FANS with MOBO

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alexzafish

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Jul 14, 2011
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Hello, I have a question! I have a 360 Radiator with 6 fans (PUSH-PULL) and they are 3 pin fan, my MOBO has only 3 controllers for CHA_FAN and I wanna control all 6 of them with the MOBO because I'm using SpeedFan Software for temps and fan speeds. Can I connect 2 fans on each connector on the MOBO and the 3 case fans to the cpu connector? I found many fan splitters but will they control all the fans speed or just the first one with the yellow line, and same for the pwm splitters I saw the 4 lines going only in the first socket the 2 line to the rest of them. Can someone help me?
 
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Feldmarschall

Feldmarschall

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PWM splitter's have 2 wires because they are meant to use only + and - component of 5V nad nothing else for regulation.

As far as connecting it, it will work one way or the other.

I don't know how the speed is regulated (voltage or current). If it is current that is used for control you'll need to connect them in serial connection in order to get wanted speeds from speed fan. If it's voltage regulated then you'll need paralel connection to make them work equally.
But do it right otherwise your CPU could get a little warmer :)
 
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JackNaylorPE

JackNaylorPE

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alexzafish

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Thank you for the answers, but I already know about the Y cables but this is what I had in mind: using one of these direct on MOBO http://www.dc-shop.ro/accesorii-ventilatoare/cablu-adaptor-akasa-pt-5-ventilatoare-pwm-l/ and then 5 of these on each soket of the other one http://www.dc-shop.ro/accesorii-ventilatoare/cablu-adaptor-akasa-pt-2-ventilatoare-pwm-l/

My real question is that wil it work? Because in the 1st Y cable 2 of the wires goes into the MOBO and the other 2 goes on the PSU (Molex).

I know about overloading the header thats why I requested help about controlling them but supplying them from another source then the MOBO header!
 
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Feldmarschall

Feldmarschall

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I think that it won't, but i may be wrong. Sense and tachometer from your CPU cooler could have huge interference and may not work proper (wrong readings due to bunch of fans no matter how you connect them).

Of course you allready know that you need fans which can be controled by pulse modulation and that signal could provide CPU cooler mess.

If I were you, i would use front panel with fan control. This way you'll be able to supply them all from your PSU control would be made outside of mobo.

Best regards :)
 
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