|Please report the actual numbers on BIOS as well as another software program like HWMonitor since high 40C's to low 50C's does sound high for your idle temps, even for a Q9550, even somewhat overclocked. If you are not running stock settings, please include your actual OC settings as well. Your issue may well still be a poorly installed heat sink with those numbers. Simply, if the thermal compound does not cover the correct area, is too thick, or has air bubbles (spread it on), it may well be the problem. Please also look at this:|
select your processor from the list and read the advice.
You have to be a little bit crazy to keep you from going insane.