I'm encouterning the followning phenomenon on the hardware side of a pc: When powering up the machine, the cpu's fan (cpu cooler's fan accuratelly) is starting to rotate, but it doesn't settle down to a certain angular speed (rpm), instead the latter keeps increasing with a small rate. I also noticed that when putting the computer into stand by mode, the fan kept rotating!
The motherboard is a Gigabyte 81945PL-G. The cooler is the one that came with the motherboard, an Intel c91 968-004 (as it is displayed in the fan's label). The cpu is an Intel Pentium Dual Core at 3.2 GHZ.
The problem is clear due to the noise of the fan, which increases with time. I think it's going to explode it i let it work for an hour or so. Apparently, it can't be related to cpu's temperature since the machine is in power off state for a long time and when i power it on, the cpu is cold.
The bios settings related to the fan, haven't been changed by anybody. Any help on that please?