Hi Dmitry, > > First, check your BIOS for an automatic fan speed adjustment option. Is > > there one? If there is one, disable it. > > I've found only 'CPU Warning Temperature', 'CPU FAN fail warnig', > and 'System FAN fail warning' all disabled. Unfortunately, this could be an indication that PWM is not wired on this board. the two Gigabyte boards using the it87 driver I have access to and that have their PWM lines wired do have the option in BIOS. > It is like the same motherboard with Windoze is silent, though I'm not > sure. Please make sure ;) If the motherboard is actually silent under Windows, please try to find out what the difference can be. Maybe you are using a specific tool under Windows? If your CPU supports some form of power saving or throttling, maybe it is enabled under Windows but not under Linux (which could result in a faster fan speed if your fan is themoregulated). > Where to find the datasheet? On ITE's web site: http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.8.2.pdf > There is a second definition in the file about it87. Maybe I'd > better to use it? I can't tell, all motherboards are different. For the temperatures, you would most likely simply do: ignore temp2 label temp3 "CPU Temp" -- Jean Delvare