Are you really sure of it, Gabriela?

Do you use the stock Finder, or the DP2 Finder instead? Have you tried parallels desktop 7? And the new Xcode, does it work without issues? These are 64-bit apps which should not run by any means on your CPU, since it doesn't support ssse3.

If you made these apps above to work with a Phenom 965 x4, you made a breakthrough discovery and should share your methods...