Gaming-ITX/ac fan control not working

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   Hello,

I have three fans:
SYS
CPU
AUX

I am able to control CPU and AUX, but not SYS. Is this intended or a fault in the motherboard?

I opened my chassis to see which header corresponds to which signal:

CPU_FAN1 = CPU (can control)
CHA_FAN1 = AUX (can control)
CHA_FAN2 = SYS (control not working)

What should I do? Is this a BIOS or HW fault?

I used both SpeedFan and F-Stream to test.

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x6phenom Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jan 2016 Status: Offline Points: 38	Post Options Post Reply Quote x6phenom Report Post Thanks(0) Quote Reply Topic: Gaming-ITX/ac fan control not working Posted: 02 Feb 2016 at 10:05pm
	Hello, I have three fans: SYS CPU AUX I am able to control CPU and AUX, but not SYS. Is this intended or a fault in the motherboard? I opened my chassis to see which header corresponds to which signal: CPU_FAN1 = CPU (can control) CHA_FAN1 = AUX (can control) CHA_FAN2 = SYS (control not working) What should I do? Is this a BIOS or HW fault? I used both SpeedFan and F-Stream to test.

x6phenom Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jan 2016 Status: Offline Points: 38	Post Options Post Reply Quote x6phenom Report Post Thanks(0) Quote Reply Posted: 02 Feb 2016 at 11:03pm
	Updated from BIOS 1.7 to 1.8 SYS / CHA_FAN2: control still not working

tmorris Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Feb 2016 Status: Offline Points: 2	Post Options Post Reply Quote tmorris Report Post Thanks(1) Quote Reply Posted: 03 Feb 2016 at 1:35am
	I ran into the same issue. Are you using 3-pin or 4-pin (PWM) fans. I found that the CHA_FAN2 pin ran at full speed for voltage but worked if using a PWM fan. Then I found this in the on-line specifications: "CPU_FAN1 and CHA_FAN1 can auto detect if 3-pin or 4-pin fan is in use." I think the first two can do both but the third can only control a PWM fan.

x6phenom Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jan 2016 Status: Offline Points: 38	Post Options Post Reply Quote x6phenom Report Post Thanks(0) Quote Reply Posted: 03 Feb 2016 at 3:38am
	All three are 3 pin connectors. Its so weird.. why would they even do this? I had to move my radiator fans to CPU_FAN and CHA_FAN1 and move my pump head connecter to the CHA_FAN2 (which doesnt control and runs at max always). The problem is configuring fan profiles in BIOS. Since CPU_FAN1 responds to ? (CPU temp presumably) and the CHA_FAN1 can be configured for either motherboard or CPU. But when I set simialar fan profile settings, the CPU_FAN1 is always running at a lower speed than the CHA_FAN1 (no matter if I make it respond to motherboard or CPU temp). It as pretty frustrating, eventually gave up and decided to use SpeedFan.