They managed to put the most PC demanding content to the demo, which is... not quite smart indeed, but turning your graphics down a bit should solve your problem. The rest of their content is a piece of cake, hardware requirement-wise, so they are probably on the logic, that if you can run this, you can run the rest perfectly. I did not have a single problem with the game though, except for one thing. Which was freezing after 16+ cars joining the race online, but that was caused by my 32bit system. Even upgraded PC since then.