《黑手党2》开启GPU物理加速的方法
来自官方的说法：
SOLUTION: you need to reinstall PhysX drivers.
Uninstall current one, than install PhysX_10.05.12_9.10.0512_SystemSoftware package manually,
from \Steam\steamapps\common\mafia ii – public demo\3rd
1. run GPU-Z, no Physx
2. go to(c:\Program Files (x86)\Steam\SteamApps\common\mafia ii – public demo\3rd\)
3. run PhysX_10.05.12_9.10.0512_SystemSoftware.msi, uninstall physx
4.run again PhysX_10.05.12_9.10.0512_SystemSoftware.msi install physx
5. run GPU-Z, Physx oh YES
6. run Mafia 2
我的还没下玩，有安装过的可以试一下。