My MOBO is Asus P7P55D-E PRo. Currently I have 2 scythe gentle typhoons on a megahalem cooling my cpu. They are both 3 pin fans. I have one hooked up to CPU_fan header and another to Chassis_fan header. They are running at full speed which I didn't mind as I was testing OC and max loading anyways.
In any event, I'm done OC and want to be able to start having the fans run quieter at idle but am having problems. I've tried both BIOS control and Asus Fan Xpert and they are both able to slow down the fan on the Chassis_fan header but not the CPU_fan header.
My guess is that the CPU_Fan header is trying to control it with PWM as it is a 4 pin fan header. Is there any way around this? Is the CPU_Fan header only capable of PWM control and not able to just drop voltage like I believe the chassis_fan header is doing?
In any event, I'm done OC and want to be able to start having the fans run quieter at idle but am having problems. I've tried both BIOS control and Asus Fan Xpert and they are both able to slow down the fan on the Chassis_fan header but not the CPU_fan header.
My guess is that the CPU_Fan header is trying to control it with PWM as it is a 4 pin fan header. Is there any way around this? Is the CPU_Fan header only capable of PWM control and not able to just drop voltage like I believe the chassis_fan header is doing?