Hello there! After I upgraded my PSU to a BEQUIET Straight Power 600W and my video card to a EVGA 8600 GTS the CPU fan of my E521 is very loud! When I boot up there is only the fan of the 8600 GTS, but after 10 sec or so the CPU fan gets louder and louder until it reaches his maximum speed! What's wrong with it? PS: Wenn i connect the fan to the PSU its not that loud, but still too loud and then I get that F1 failure because the fan is undetected(I think its called CPU fan failure)