I just upgraded from a 2400+ to a 3200+ and I have a MSI K7N2 mobo as well. Everything was fine with my 2400+ and I was able to OC it to 2200mhz without any heat problem.
Now with my 3200+, each time I play a 3D game for more than 5 minutes at stock speed (11 x 200 FSB) my temp goes from 57 to 65 (if not more) and the computer crashes. Even if it's running on a Volcano11+ HSF and uses Artic Silver 5 compound. The only setting that seems to be stable is multi 11 x 190 FSB with regular TermalTake compound.
Now with my 3200+, each time I play a 3D game for more than 5 minutes at stock speed (11 x 200 FSB) my temp goes from 57 to 65 (if not more) and the computer crashes. Even if it's running on a Volcano11+ HSF and uses Artic Silver 5 compound. The only setting that seems to be stable is multi 11 x 190 FSB with regular TermalTake compound.