I just recently purchased a cooling fan for my computer and it turns out that my SYS_FAN4 on my motherboard doesn't work. I plugged my fan into sys_fan3 and it works perfectly fine. My motherboard is the gigabyte z77x-ud3h. Anyone know how to fix this?
More aboutsys_fan working
Check in the BIOS and see what the settings are for SYS_FAN4.