I also have a p4 3.2 . This has been the same problem i had. If your using the fan that came with the cpu i would buy another one. I,m using the Volcano 7+ controled by my Nexus 101 panel. I have it set at low speed 3650 rpms and change my case fans locations. Side fan blowing in front fan blowing in and the rear fan blowing out. Went from 51 c to 39 c. Also saw that after 30 hrs of use the temperature started to go down. Hope this helps. Or you can you go it get liquid cooling system that I keep reading about.