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Alienware Area-51 r2 motherboard switch - fans running at MAX

post #1 of 6
Thread Starter 
After having the Alienware for 2 years, I decided I needed an upgrade. I swapped it out with an EVGA X99 Classified motherboard; flashed to the latest bios. My problem is that all my case fans (original from the ALIENWARE) which are 4-pin run at 100% and it's super loud. The pump and CPU fan take up the only 4 pin fan connectors on the motherboard. This leaves me with only 3-pin fan inputs for fans that have 4-pin connectors.

In short - I have two fans with 4-pin connectors and only 3-pin inputs on the motherboard. I can't figure out how to make all the fans not run at full speed.

In the bios I tried SMART, PWM, and even just lowering the fans down to 5% just to see what would happen. So far the only thing I could find is that the fans will work and info about changing voltages. But that is over my head. Any help would be much appreciated as it feels like I'm working inside a blower.

thumb.gif
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post #2 of 6
I think the problem is that since not all the pins are being used on the fans, the mobo cannot control them so you end up with max speeds. Get a bay fan controller for like ~$50 and have direct control again.
 
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post #3 of 6
Quote:
Originally Posted by Gunderman456 View Post

I think the problem is that since not all the pins are being used on the fans, the mobo cannot control them so you end up with max speeds. Get a bay fan controller for like ~$50 and have direct control again.
Maybe I am misunderstanding you, but all 4-pin fan plugs I have seen have always 4 lead PWM .. while 4-pin fan headers on motherboard are not always using all 4-pins and are not always PWM headers. Pins 1, 2 and 3 are always ground, power and rpm. Pin-2 is variable voltage for well, veriable voltge control and 12v for PWM with pin-4 being PWM signal for PWM control.
post #4 of 6
Quote:
Originally Posted by mikeguy3086 View Post

After having the Alienware for 2 years, I decided I needed an upgrade. I swapped it out with an EVGA X99 Classified motherboard; flashed to the latest bios. My problem is that all my case fans (original from the ALIENWARE) which are 4-pin run at 100% and it's super loud. The pump and CPU fan take up the only 4 pin fan connectors on the motherboard. This leaves me with only 3-pin fan inputs for fans that have 4-pin connectors.

In short - I have two fans with 4-pin connectors and only 3-pin inputs on the motherboard. I can't figure out how to make all the fans not run at full speed.

In the bios I tried SMART, PWM, and even just lowering the fans down to 5% just to see what would happen. So far the only thing I could find is that the fans will work and info about changing voltages. But that is over my head. Any help would be much appreciated as it feels like I'm working inside a blower.

thumb.gif

are you sure those fans are below 1 amp?
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post #5 of 6
The real question is what is the model number of the fans
finally quiet
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post #6 of 6
Thread Starter 
After getting in there with a light. These are the cooling fans. I found a link to someone selling them refurbished:

https://www.buffalocomputerparts.com/products/delta-electronics-dc-brushless-afc1212de-cooling-fan-d8794?utm_medium=cpc&utm_source=googlepla&variant=34421929166&gclid=Cj0KEQjwuZvIBRD-8Z6B2M2Sy68BEiQAtjYS3CcXyFbMk_qXm3ZJydl9xk1Q_f-yK3PNNNuATvZ1ryEaAj-D8P8HAQ

I hope this helps. Also, I've never even heard of the company... hmmsmiley02.gif
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Otis
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