I can't speak well on the simulation requiring a Pro GPU. But I can easily tell you that for a small bump, you should be able to add one on(check MoBo slot type/availability, but any recent machine SHOULD have a PCI-E 2+ slot). Many people here recommend the V4900 as a cheap entry level Pro card. Less than I plan on paying for my next gaming card. Under $200 and you have your Pro level card.
The rest of the specs are ok, but a small bump in RAM will pay off for medium to large assemblies.
Thanks a lot Patrick for pay you attention & your valuable comments.