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Case Fans Question

post #1 of 22
Thread Starter 
Hello, I'm going to put some fans to my case, but I don't know where to connect them. On my motherboard I found 3 connectors: PWR_FAN; SYS_FAN 1 and SYS_FAN 2.... Where I must connect them? Can I conntrol their speed without a controller (I don't want to work on full speed) or they will work automatic (low t°C = low RPM and high t°C = high RPM)? And my last question is: can I put more than 3 fans (I wanna put 4) if "yes" where to connect the 4-th one?

P.S. I'm going to put fans from Arctic Cooling, they are with Fluid Dynamic Bearing. I think they are good smile.gif
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Lyralei
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post #2 of 22
Which AC fans do you plan on getting?
Your mb has two PWM fan connectors cpu and sys fan 1.
Pwr fan and sys fan2 are three pin.
If you get a AC PWM fan with "power sharing technology" you can daisy chain up to five fans off of one header.

Gyro
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post #3 of 22
Quote:
If you get a AC PWM fan with "power sharing technology" you can daisy chain up to five fans off of one header.

Not advisable. Most mobo headers can only handle a max of 1 amp draw before you cook it.wink.gif
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post #4 of 22
Quote:
Originally Posted by Mr.Scott;11885127 
Not advisable. Most mobo headers can only handle a max of 1 amp draw before you cook it.wink.gif

AC PWM fans only draw .15 amps x 5 = .75 amps.That's at max rpm.

Gyro
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post #5 of 22
Quote:
Originally Posted by Gyro;11885178 
AC PWM fans only draw .15 amps x 5 = .75 amps.That's at max rpm.

Gyro
I'll take your word for it, I didn't look up the fans. FWIW, I think the 1 amp spec is over-rated anyway. I've cooked headers on 1 fan with less than 1 amp draw before. Rule of thumb is 1 header, 1 fan, and if you're using a high performance fan, don't use the header at all. Use a controller or go directly from the PSU.

EDIT- Also, maximum draw is at fan startup, not maximum RPM.
Edited by Mr.Scott - 1/4/11 at 6:38am
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post #6 of 22
Thread Starter 
Quote:
Originally Posted by Gyro;11885178 
AC PWM fans only draw .15 amps x 5 = .75 amps.That's at max rpm.

Gyro

You mean if I get 4 from these, and connect them in chain? Will they be controlled by the motherboard? (I mean the RPM)(low t°C = low RPM and high t°C = high RPM)
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post #7 of 22
Yes.

Gyro
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post #8 of 22
Thread Starter 
Quote:
Originally Posted by Gyro;11885319 
Yes.

Gyro

And Mr.Scott think that is ot safe, are you sure that this is safe?
Lyralei
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post #9 of 22
I wouldn't do it, but that's just me.
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post #10 of 22
Yeah not wroth your mobo for a little extra noise.
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