Re: [gentoo-user] Gigabyte and controlling fans

[Andrea Conti]

> It's a Gigabyte 770T series mobo.  It uses the it8720 chip.

You can try writing directly to the pwm control inputs under the
platform device node (i.e. /sys/devices/platform/it87.xxx/pwm*); these
usually take 8-bit (0-255) values.

E.g. to set pwm1 to a value of 127 you just do

echo 127 >/sys/devices/platform/it87.xxx/pwm1

You should take a look at the it87 driver source to find out what the
various parameters mean.

Note that I don't have a board with a modern it87 chip (i.e. one which
can do fan PWM control) at hand, so the device names might be different;
these were taken from a board using a Winbond w83627dhg chip.

Also, if you wish to control the fans manually you should probably turn
off any kind of automatic fan control in the BIOS.

andrea