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3Pin Case fans to 4Pin fan controller

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July 24, 2013 8:21:30 PM

Hey everyone i'm gonna be building a budget build featuring the i5 4570 with a gtx 670 in the Coolermaster HAF 912.

I will be using a 200mm top exhaust fan, the stock 120mm rear exhaust, and i will be using Bitfenix Spectre Pro's 120mm for intakes, and i will mount the stock intake on the side panel of the haf912. Unfortunately, the motherboard i have chosen (ASUS B85-PLUS ATX 1150)
http://www.ncix.com/products/?sku=84514&promoid=1360

It only has 2 chasis fan connectors and they're 4pin. So I will be buying a fan controller: The AeroCool STRIKEX-X1000
http://www.ncix.com/products/?sku=81430&promoid=1360

Now here is my question. The fan controller controls up to 5 fans using 4pin connectors. However i do not want my side panel intake fan and front intakes to run at full speed, and they are all 3pin connectors. Can 3pin fans be run on a 4pin fan controller and still have full control?

Thanks in advance =)

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July 24, 2013 8:35:20 PM
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Here's where NewEgg's descriptive value comes in handy, check out the pics on this link http://www.newegg.com/Product/Product.aspx?Item=N82E168... the fan controller has one 4pin molex input and the 5 outputs are 3pin so you should be fine (click on the product picture and check out the pic that shows the back)
July 24, 2013 8:36:24 PM

The images and the manual seem to indicate it is a 3 pin controller.

3 pin fan headers will control 4 pin fans, but not all 4 pin controllers can control 3 pin fans(my MB will NOT control 3 pin fans on the cpu header.).

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July 24, 2013 8:56:43 PM

C12Friedman said:
Here's where NewEgg's descriptive value comes in handy, check out the pics on this link http://www.newegg.com/Product/Product.aspx?Item=N82E168... the fan controller has one 4pin molex input and the 5 outputs are 3pin so you should be fine (click on the product picture and check out the pic that shows the back)


so in other words, I'm fine with my set up and I can control my fans no problemo?
July 24, 2013 8:59:39 PM

Also, would this power supply be enough for my rig? (i5 4570, gtx 670, 5fans -1 200mm, 4-120mm, 8GB of ram)? No overclocking.
July 24, 2013 9:00:26 PM

Hello.
The difference between 3-pin and 4-pin fan headers is that the 4-pin ones have an extra PWM pin. This PWM pin, when connected to a 4-pin motherboard fan header for example, can control the speed of the fan automatically.

This AeroCool STRIKEX-X1000 has 3-pin fan headers. The AeroCool fan functions do not connect to the motherboard in any way!!! You connect each fan to the AeroCool and connect the AeroCool to a 4-pin MOLEX on your POWER SUPPLY. You control the speed of the fans with the knobs on the front.

Hope this helped.

EDIT: 620W should be more than enough to power that system at full load.

EDIT 2: 4-pin motherboard fan headers can power 3-pin fans, but the fans will run at full speed. You can plug 4-pin fans into motherboard 3-pin headers, but they'll just run at full speed as well.
July 24, 2013 9:17:09 PM

Patosai said:
Hello.
The difference between 3-pin and 4-pin fan headers is that the 4-pin ones have an extra PWM pin. This PWM pin, when connected to a 4-pin motherboard fan header for example, can control the speed of the fan automatically.

This AeroCool STRIKEX-X1000 has 3-pin fan headers. The AeroCool fan functions do not connect to the motherboard in any way!!! You connect each fan to the AeroCool and connect the AeroCool to a 4-pin MOLEX on your POWER SUPPLY. You control the speed of the fans with the knobs on the front.

Hope this helped.

EDIT: 620W should be more than enough to power that system at full load.

EDIT 2: 4-pin motherboard fan headers can power 3-pin fans, but the fans will run at full speed. You can plug 4-pin fans into motherboard 3-pin headers, but they'll just run at full speed as well.


Thanks a lot! This really helped me. So my 3pins will be controlled perfectly fine on the fan controller I'm buying?
July 24, 2013 9:19:51 PM

Yes!! Don't forget about the knobs.
July 24, 2013 9:27:22 PM

Every 4 pin(PWM) fan I have ever owned could be controlled with voltage as well. So i am 90+% sure that any 4 pin fan will get speed control on a 3 pin header that has control built in(voltage).

For a while boards used to have a bios option to set voltage OR PWM.

I fully agree with the above poster. The power supply is good and the controller will work with the fans just fine.
!