What is suitable pc for 3d

Amd and intel is good for autudesk maya but that need vga professional like Nvidia fx quadro or amd firepro .. That's vga important for autodesk.
I7990x + nvidia quadro
or phenom II 1090T / next month Bulldozer 8core + amd firepro

In link minimum requirement system for autodesk Maya http://usa.autodesk.com/maya/system-requirements/

Also you can find with search in google system for it