Hey your psu is fine.
I also wonder if you need a $500 6 core cpu? If your budget is tight? The requirments for that software are not that cpu demanding. Ram and graphics seem to be more important. You definitly do not need it for gaming. Just my opinion.
Windows 7 64-bit, Windows Vista 64-bit (SP2), or Windows XP Professional x64 Edition (SP2)
AMD64 or IntelÂ® 64 processor
6 GB RAM or more
CAD workstation-class graphics card