I have a 540j 3.2 ghz processor and in the bios it reads 55-60c but when I install speedfan the 2nd temp is 45-47c..... which is correct??? if the bios temps are correct then the cpu will shut down when I play HL2 or UT 2004...I was playing UT 2004 and switched between the game and speedfan and it reads 60-62c which in tern would mean that the bios temps are reading 70-75c which would shut it down.... any suggestions