All CPU's will heat up when they are busy, Openoffice is open source and as with most open source Programs and OS's It's light and easy on hardware, whereas Microsoft word is more heavy and power hungry, Can I ask what tempreatures you are experiencing, Normal running 50oC could be acceptable, but more than that and you are looking at instability and a reduced lifetime.
Hi everyone: I notice that when using Word 97 my cpu temp shoots up dramatically. This does not happen at all with openOffice. My PC's got Windows XP Home, 250 RAM, P4 2.4 GHz. Can anyone explain this?