First things first though. You'll need to reinstall the PhysX software that can be located at " /streamapps/common/mafia ii public demo/3rd ". If you don't, the game will run the PhysX effects in CPU mode, so make sure you do it.
We'll use a common PC gaming system (Q6600 @ 3.02Ghz, 4GB DDR2 and a GTX295). We've tested the demo with max details at 2048x1536. Without enabling the APEX settings, the demo run great, with some minor frame drops here and there. The GPU usage was around 80-90% and the game was taking full advantage of SLI and the multicores as you can see bellow.
