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Discussion Starter #1
I have 2 fans on my megahalem, I dont know which power to use on my motherboard. My 120x38mm and 120x25mm. I have 2 power option one says CPU fan and the other says power fan. The cpu fan has 4 pins the power fan has the 3.

But on my fan there is only 3 pins on both of them so doesn't it matter which I use?
 

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Quote:


Originally Posted by doc2142
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I have 2 fans on my megahalem, I dont know which power to use on my motherboard. My 120x38mm and 120x25mm. I have 2 power option one says CPU fan and the other says power fan. The cpu fan has 4 pins the power fan has the 3.

But on my fan there is only 3 pins on both of them so doesn't it matter which I use?

Be careful when plugging a high powered fan into a motherboard. I have the same board you do and i'm not sure plugging them directly into the board is a good idea unless they are low speed, low power fans. I would just plug them straight into the psu using molex connectors or use a good fan controller.
 

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Quote:


Originally Posted by doc2142
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I have 2 fans on my megahalem, I dont know which power to use on my motherboard. My 120x38mm and 120x25mm. I have 2 power option one says CPU fan and the other says power fan. The cpu fan has 4 pins the power fan has the 3.

But on my fan there is only 3 pins on both of them so doesn't it matter which I use?

either fan will work. The CPU fan header has 4 pins for PWM fans
 

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Quote:


Originally Posted by doc2142
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Mine is not really a power fan its only 2000 rpm

Is it an ultra kaze? or panaflo? and what about the 25mm?
 

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Originally Posted by doc2142 View Post
No they are not ultra kraze
... well then what are they? lol
 
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Discussion Starter #9
Scythe Model DFs123812L-2000
DC12v .25A

CooolerMaster
A12025-20RB-3BN-F1
Dc12 .37A
DF1202512RFUN

Those are the two. Those are ok right?
 

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Quote:


Originally Posted by doc2142
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Scythe Model DFs123812L-2000
DC12v .25A

CooolerMaster
A12025-20RB-3BN-F1
Dc12 .37A
DF1202512RFUN

Those are the two. Those are ok right?

Yes.
 

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AMD Overclocker
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9,176 Posts
Quote:


Originally Posted by doc2142
View Post

Scythe Model DFs123812L-2000
DC12v .25A

CooolerMaster
A12025-20RB-3BN-F1
Dc12 .37A
DF1202512RFUN

Those are the two. Those are ok right?

yup, those sound like they would be okay.


EDIT: by the way, that scythe fan is just a lower rpm ultra kaze.
 

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Keep the current 1 amp or less for any fan header.

That power fan header is supposed to be a way for a psu fan to communicate to the mb what rpm it is. However, we lucky Gigabyte owners can use it as a fixed voltage fan power source. It's great for your front case fan.

Don't you have any SYS_FAN headers? I have two on my MB.

PWM vs voltage control: in your BIOS opening screen choose PC Health Status. In the PC Health Status screen, at the bottom you see CPU Smart FAN Control. Set that to ENABLED. Beneath that you see CPU Smart FAN Mode. Enter that and set it to Voltage. If you set it to Auto you will get PWM control.

If you want to control more than one high amp fan, Akasa makes a cable that takes PWM input from the MB, power from Molex, and applies it to up to three fans.
 
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