I have the above computer with a problem...It starts up with CPU fan on full and then the fan dies.......
I have now done the following:
Tried another PSU...
Reset BIOS......
Removed Heatsink and cleaned and reset again......
Changed the CPU fan twice...
Connected the fans up to an independant supply...no problems with the fans..
LOL You are chasing a problem that does not exist, The fan runs at full speed on reset then the speed control kicks in, if the cpu starts to get warm it will start to turn, not really fast just enough to keep things cool, you can turn it of in the BIOS if you wish.
Brum.