ACPI driverek kellenek a hibátlan működéshez, és a BIOS is lehet régi.

Flashing your bios to version 503 will fix the problem perfectly, but v503 is only available through LiveUpdate. If you can't get LiveUpdate to flash your bios, do the following:

Download the bios zip directly: here
Extract it to a temporary location
Run WinFlash and point it to the bios file. If it likes the look of the rom, it'll let you restart and flash. Bingo, no more loud fan.

http://liveupdate01.asus.com/pub/ASUS/nb/F5R/F5R503AS.zip