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Noob question, how do I control my pwm fans?

post #1 of 8
Thread Starter 
I can't find an option for it in my BIOS (only gives me voltage settings). Do I need some kind of third party software or a fan controller? (I would rather not get the latter)

Here's a pic of my BIOS just fyi. The fan I'm trying to control is plugged into JPWR
post #2 of 8
Quote:
Originally Posted by Snuckie7 View Post

I can't find an option for it in my BIOS (only gives me voltage settings). Do I need some kind of third party software or a fan controller? (I would rather not get the latter)

Here's a pic of my BIOS just fyi. The fan I'm trying to control is plugged into JPWR
Lowering the voltage lowers the RPM's respectively. A fan running at 5v is much quieter than at 12v. thumb.gif
And that will work for non pwm fans as well. It was designed for non-pwm fans.
Edited by ripsaw - 3/4/13 at 11:44pm
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Ripsaw0.9
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Samsung Miracle Ram DDR3 2x4Gb 1866Mhz Samsung 830 Hitachi 2tb 7200rpm OCZ Vertex 3 120 
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post #3 of 8
Thread Starter 
Yea but I bought a pwm fan for a reason. I want a little more precision over the fan speed control.
post #4 of 8
Quote:
Originally Posted by Snuckie7 View Post

Yea but I bought a pwm fan for a reason. I want a little more precision over the fan speed control.
Should have checked your mobo specs first, it has voltage regulation not pulse width modulation. They're all 4 pin headers though...what the heck?That would make me think they're pwm controlled as well. mad.gif I'm trying to find a definite answer on this......
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Samsung Miracle Ram DDR3 2x4Gb 1866Mhz Samsung 830 Hitachi 2tb 7200rpm OCZ Vertex 3 120 
Optical DriveCoolingCoolingOS
LG BluRay Burner h100 Coolermaster sickleflow red x4 Windows 7 Ultimate x64  
KeyboardPowerCaseMouse
Razer BlackWidow Cougar powerx 700 Custom Test Bench (in progress) Gigabyte Gaming Mouse 
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post #5 of 8
Thread Starter 
Yea i thought the 4 pin headers would be fine. Time to give EVGA support a call I guess.
post #6 of 8
Thread Starter 
So EVGA support said that the only fan header that supported PWM control was the CPU fan header. . .

I don't feel like returning the fan so I guess I'll just mess with the voltage. Anyone have a graph of voltage vs. fan speed for this fan?

Edit: Just messed with the voltages, and I had to drop it all the way down to 2V to get the fan to drop at all under 1500RPM. And at 2V the fan only runs at 800RPM now -____-

I'm probably going to exchange it for the 1200RPM non pwm version and hope that fixes things.
Edited by Snuckie7 - 3/6/13 at 2:10pm
post #7 of 8
Buy a PWM splitter with a molex power socket. Plug it's PWM into your CPU fan and CPU fan into master socket in splitter (the one with all 4 wires) and plug in molex to PSU molex. Now all fans will run the same as CPU fan.
post #8 of 8
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