HCL/Main Boards/Gigabyte/GA-J1900N-D3V
Sensors chip
The motherboard use the ITE IT8620E chip (useful also to read voltages, mainboard temp, fan speed). Since today 06/10/2014 lm-sensors has no driver support for chip ITE IT8620E [1] [2]. lm-sensors developers had a report that the chip is somewhat compatible with the IT8728F for the hardware monitoring part.
You can load the module at runtime with modprobe:
$ modprobe it87 force_id=0x8728
Or you can use systemd-module-load.service to load the module during boot process by creating the following two files.
/etc/modules-load.d/it87.conf :
it87
/etc/modprobe.d/it87.conf :
options it87 force_id=0x8603
Once the module was loaded you can read informations with Lm_sensors :
$ sensors
Now you can also use fancontrol to control the speedsteps of your case fan.