Only CHA_FAN1 working

Update: I've also tried flashing both version of BIOS, same problem. Reset CMOS using jumper and also removing battery, didn't work too.

xnivx01 wrote: Hi, I own a H170 Pro4/Hyper motherboard and it comes with 3 CHA_FAN headers as stated in the technical specifications. The problem is, only CHA_FAN1 and CHA_FAN2 have adjustable speed in the BIOS, while the RPM speed of CHA_FAN3 can only be seen. What's worse is that the speed of CHA_FAN2 does not change and is not affected no matter what percentage % I've set in the HWMonitor in BIOS, even with 0% the fan on CHA_FAN2 will run at full speed. I've tried different fans for all of the headers, 3-pin and 4-pin does not make any difference. I can only change the speed of the fan that is connected to CHA_FAN1. CHA_FAN2 and CHA_FAN3 only work as a power supply to the fans, and I'm not sure what's the purpose of having CHA_FAN2 adjustable in the BIOS.

The CHA_FAN3 header is a full power only header on your board, and cannot have its speed controlled.

The CHA_FAN2 header should be able to control fan speeds. As wardog asked, what fan models have your tried on that header?

Did you select the Temperature Source that is monitored for the CHA_FAN2 header?

Do you have your board's A-Tuning program running in Windows? If you do, its fan speed control settings will override the settings in the UEFI/BIOS.

xnivx01 wrote: The fans I'm currently using are CM Jetflo 120. I've tried SickleFlow 120 from my old PC and it's the same as well. I understand that CHA_FAN3 is not adjustable since there is no option in the BIOS, but I can adjust the speed of CHA_FAN2. I've tried every percent % at all temps, using CPU source and motherboard source, yet the fan on CHA_FAN2 is running at 100%. Currently I can only adjust the speed of CHA_FAN1, quite disappointed. No I have no utility/tuning programs. Everything is set in BIOS.

Unless the CHA_FAN2 header is not working, that does not make sense. The CM Jetflo is a four pin PWM fan, and the Sickleflow is a three pin voltage controlled fan.

We've heard reports that the four pin fan headers on the more budget oriented boards are only working in PWM mode, so the Jetflow at least should work on the CHA_FAN2 header.

Are you using the low noise adapter cable with the Jetflo fan? That makes it the equivalent of a three pin voltage controlled fan.

As a test, try installing your board's A-Tuning program. The FANTastic Tuning feature in it has a Fan Test button on each of the fan header screens. Select the CHA_FAN2 header screen and run the Fan Test by clicking that button. Try the Jetflo without the low noise adapter, the normal four pin connection. You should easily hear the Jetflo (I have several) at full speed, which is how the test starts. It then reduces the speed of the fan to its minimum speed, which also should be audible.

When the Fan Test is complete, the fan will again run at full speed. You must click the Apply button to select the fan speed profile on the screen, which by default matches the setting in the UEFI/BIOS. You could try the same thing with the three pin Sickleflo.

Please let us know what results you get.

During the fan test I did not hear any differences and the program shows that the fan is running at around 1050 RPM at all stages. I've tried that with the fan on CHA_FAN1 (which could go from 2000 RPM to 500 RPM) and it's the same too. Any fan that is plugged into CHA_FAN2 will be stuck at 1050 RPM.

Edited by xnivx01 - 29 Dec 2016 at 9:26am