mini itx mobo with more than 2 true pwm fan headers?

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susdu
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mini itx mobo with more than 2 true pwm fan headers?

Post by susdu » Fri Apr 25, 2014 9:25 am

is there such a thing?

Vicotnik
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by Vicotnik » Fri Apr 25, 2014 11:30 pm

Do you need independent headers? Otherwise there are pwm fan splitters.

susdu
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by susdu » Sat Apr 26, 2014 10:09 am

How many fans can I ran from a single header? Current wise

ggumdol
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by ggumdol » Sat Apr 26, 2014 3:14 pm

No. Not that I'm aware of. Asrock ITX motherboards provide only 2 genuine PWM headers.
susdu wrote:is there such a thing?

washu
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by washu » Sat Apr 26, 2014 4:41 pm

susdu wrote:How many fans can I ran from a single header? Current wise
Depends on the MB. It's usually specified somewhere in the manual.

There are PWM splitters that use a standard 4-pin molex (PATA hard drive power) connector so you don't have to worry about how much the MB can supply.

Zolishoru
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by Zolishoru » Sat Apr 26, 2014 8:46 pm

4-Wire Pulse Width Modulation (PWM) Controlled Fans Specification(PAE Tech Pubs - Intel, Folsom) wrote: 2 Electrical Specifications
2.1.2 Current
Steady state operation fan current draw (with 12.6 V applied, with fan operating in the free stream
condition) shall not exceed 1.5 A.
Fan current spike during start-up operation (with 12.6 V applied, with fan operating in the free
stream condition) shall be allowed to exceed 1.0 A, up to 2.2A maximum for a duration of no
greater than 1.0 sec.
I would interpret the quote that up to 1A is safe load, just to be on the safe side.

susdu
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Re: mini itx mobo with more than 2 true pwm fan headers?

Post by susdu » Sun May 04, 2014 11:40 pm

Thank you all for the info. PWM splitters it is.

WiSK
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Joined: Thu Aug 28, 2014 5:32 am

Re: mini itx mobo with more than 2 true pwm fan headers?

Post by WiSK » Thu Aug 28, 2014 5:35 am

susdu wrote:is there such a thing?
Asus P8Z77-I Deluxe has two true PWM fan headers, and no DC control

Came here via google wondering if anyone knows of a Z97 mini ITX board with more than one true PWM fan headers? :D

After more searching Asus Z97I-Plus might have 3 PWM headers. The manual lists pin4 as 5V, but suggests there is an option in BIOS to switch from DC to PWM control.

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