Pwm fans with fanspeed
Pwm fans with fanspeed
I own these fans
http://www.newegg.com/global/au/Product/...6835856012
and this adapter
http://www.newegg.com/Product/Product.as...lsrc=aw.ds
with my GA 990 Fxa UD3 R5, and after connecting everything in the computer it functions like a generator and prevents the fans from running at full speed.
It's essentially a molex powered PWM splitter setup. PWM fans operate at a steady 12v. The PWM signal rapidly switches the fans on and off, maintaining them near full speed whenever the signal is active. These fans connect through female ports while the 1x male plugs into the motherboard, supplying the PWM control. This configuration functions only with 4-pin PWM fans. For 3-pin fans, voltage control would be necessary since the molex provides a fixed 12v from the PSU, requiring a controller with rheostats for proper output adjustment.
The answer applies when using Molex cables, a fan controller is the best option.
RagingRabbits :
If the fans are not connected to the motherboard the software does not work.
Ok but then how do i make the fans slow down its way too loud
You need to get a fan controller, as shown in this example: http://www.newegg.com/Product/Product.as...6811990009. I don't think I'll buy one now since the reviews say it functions properly.
That's nothing more than molex powered pwm splitter. Pwm fans run at a constant 12v. The pwm signal turns the fans off/on really fast, so at anything under 100% the fans are in a state of always trying to run.
The fans plug into the female ports and the 1x male plugs into the motherboard. That's what provides the pwm signal, the molex just provides power. This only works with 4 pin pwm fans. If you have 3 pin fans, they are voltage controlled and will not work with this adapter as the molex is providing a constant 12v from the psu. In that, you'd need an actual controller with rheostats to control the output voltage.
As to the motherboard connection, some ports can't be controlled, like cpu_aux. This too runs 12v constantly in many cheaper boards. Other than that, it can depend on the bios setting. If you use analog/legacy for fan control, it'll only run 3 pin fans, not pwm. Fan control must be set for pwm and use sys_fan1 or sys_fan2 as these are usually 4 pin pwm accepted, higher ports often using 3 pin analog ports.