Nobody has any experience with that configuration, because the components are incompatible. It is like using water in a barbeque, it will not work.
Questions like these are better asked in the hardware forum.
I don't know anything about the specific components you mention, but basically a Win7 64/Intel i7/ 12 GB RAM system should be right on the money for CS5 Production Premium. Particularly if you add an nVidea CUDA GPU certified by Adobe for MPE.