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PWM controled pump and fans possible?

post #1 of 26
Thread Starter 
Hi,

I was wondering how it would be possible to not only hook up a pwm pump (Swiftech MCP-35X), but to also have the radiator fans on pwm.

Do all motherboards only have one 4 pin connector (CPU fan header) or would a separate controller be required?

I was planning my build and one thing I would like to avoid is having to manually adjust fan speed.
post #2 of 26
Get a PWM fan controller, or just split your PWM lead up. Hmm, Rheosmart 6 or something iirc.
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post #3 of 26
Thread Starter 
If I split the PWM, wouldn't there be confusion on the information coming in from the either the fans or pump?
post #4 of 26
Quote:
Originally Posted by moy View Post

If I split the PWM, wouldn't there be confusion on the information coming in from the either the fans or pump?

Not if you only run one tachometer back to the board.
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post #5 of 26
tsm106 pretty much got it answered. You would need a PWM Y-splitter like this. The only problem I would see is that your fans and pump would be controlled together, which may not always be good. I suggest just sticking either the pump or fans on a 3-pin and letting your motherboard's BIOS take care of it.

Otherwise, a fan controller is probably your best bet. The Rheosmart 6 lets you control each channel through a manual mode (knobs) and a PWM mode, in which you could connect your motherboard's 4pin PWM to the controller's PWM and you can switch any channel to be controlled that way.
    
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post #6 of 26
Asus mobo has 2 cpu fan header, atleast my crosshair v does. Its not good to plug 2 different thing in one header, if it both fans then its good, but pump and fan is not
Edited by ghostrider85 - 1/30/12 at 6:37pm
post #7 of 26
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

Not if you only run one tachometer back to the board.

But the pump and fans are different. The information that is being provided by the fans is different than the information that is being provided from the pump. I'm worried that the wrong info would be sent out.
Quote:
Originally Posted by ghostrider85 View Post

Asus mobo has 2 cpu fan header, atleast my crosshair v does. Its not good to plug 2 different thing in one header, if it both fans then its good, but pump and rad is not
post #8 of 26
Quote:
Originally Posted by ghostrider85 View Post

Asus mobo has 2 cpu fan header, atleast my crosshair v does. Its not good to plug 2 different thing in one header, if it both fans then its good, but pump and rad is not

if you're just splitting the pwm signal and getting 12v power from a molex it's a non-issue, just make sure you don't draw more than 1 amp from a motherboard fan header, though some motherboards can handle 2 amps, i just wouldn't want to roll the dice like that

akasa makes a 5 way pwm splitter that takes the 12v power from a molex
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post #9 of 26
What prevents you from plugging it to the chassis/case fan header? Assuming its pwm header.
post #10 of 26
Quote:
Originally Posted by moy View Post

But the pump and fans are different. The information that is being provided by the fans is different than the information that is being provided from the pump. I'm worried that the wrong info would be sent out.

That's the way you wire it, and you can use a splitter like Kokin linked or cut and splice yourself. If you don't want to or are scared, get a PWM controller. I don't understand the complication here?
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